{"id":31120,"date":"2024-03-08T19:12:24","date_gmt":"2023-01-26T00:13:26","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/"},"modified":"2025-08-12T22:25:55","modified_gmt":"2025-08-12T14:25:55","slug":"%e6%80%9d%e8%80%83java","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/","title":{"rendered":"\u601d\u8003Java"},"content":{"rendered":"

\u5916\u5356<\/p>\n
\n \"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/p>\n

\u80cc\u666f\u548c\u539f\u56e0<\/p>\n

\u4e3a\u4e86\u6210\u4e3a\u4e00\u540d\u4f18\u79c0\u7684\u7a0b\u5e8f\u5458\uff0c\u6211\u5c06\u5b66\u4e60\u300aThink Java\u300b\u3002<\/p>\n

#\u8d44\u6e90
\n\u300aThink Java\uff1a\u5982\u4f55\u50cf\u8ba1\u7b97\u673a\u79d1\u5b66\u5bb6\u4e00\u6837\u601d\u8003\u300b
\n\u4f5c\u8005\uff1aAllen B. Downey
\n\u94fe\u63a5\uff1ahttps:\/\/www.amazon.co.jp\/dp\/1492072508\/ref=cm_sw_r_tw_dp_THGFFJFBXVVCYQ54R9ES<\/p>\n

\u9644\u6ce8\uff1a
\n\u6211\u5c06\u4e3b\u8981\u4f7f\u7528\u300aThink Java\u300b\u524d\u4e00\u4e2a\u7248\u672c\u7684\u7ec3\u4e60\u3002
\n\u94fe\u63a5\uff1ahttps:\/\/books.trinket.io\/thinkjava\/<\/p>\n

\u6ce8\u610f\uff1a
\n\u6559\u6750\u5c06\u4f7f\u75282e\u7248\u672c\u3002
\n\u7b2c\u56db\u7ae0
\n\u7b2c\u4e94\u7ae0<\/p>\n

\u7b2c\u4e00\u7ae0<\/p>\n

\u8a5e\u5f59<\/p>\n

\u95ee\u9898\u89e3\u51b3:
\n\u786c\u4ef6:
\n\u5904\u7406\u5668:
\n\u5185\u5b58:
\n\u9648\u8ff0:
\n\u6253\u5370\u9648\u8ff0:
\n\u65b9\u6cd5:
\n\u7c7b:
\n\u6ce8\u91ca:
\n\u9ad8\u7ea7\u8bed\u8a00:
\n\u4f4e\u7ea7\u8bed\u8a00:
\n\u4fbf\u643a\u5f0f:
\n\u7f16\u8bd1:
\n\u6e90\u4ee3\u7801:
\n\u76ee\u6807\u4ee3\u7801:
\n\u53ef\u6267\u884c\u6587\u4ef6:
\n\u865a\u62df\u673a:
\n\u5b57\u8282\u7801:
\n\u5b57\u7b26\u4e32:
\n\u6362\u884c\u7b26:
\n\u8f6c\u4e49\u5e8f\u5217:
\n\u7b97\u6cd5:
\n\u8ba1\u7b97\u673a\u79d1\u5b66:
\n\u9519\u8bef:
\n\u8c03\u8bd5:<\/p>\n

\u7a0b\u5f0f\u78bc\u4f86\u6e90<\/p>\n

\u4e00\u773c\u770b\u53bb\u5c31\u611f\u89c9\u4e0d\u9519\u3002<\/p>\n

\u953b\u70bc<\/p>\n

1
\na statement \u2192 \u6267\u884c
\ncomment \u2192 \u4e0d\u6267\u884c\u3002
\n2
\nportable
\n\u4e00\u4e2a\u7a0b\u5e8f\u80fd\u591f\u5728\u591a\u79cd\u7c7b\u578b\u7684\u8ba1\u7b97\u673a\u4e0a\u8fd0\u884c\u7684\u80fd\u529b
\n3
\n\u5c06\u6587\u6863\u3001\u6458\u5f55\u8d44\u6599\u7b49\u7f16\u8f91\u6210\u4e00\u672c\u4e66
\n4
\n\u53e6\u4e00\u79cd\u5bf9\u8c61\u4ee3\u7801\u7684\u540d\u79f0\uff0c\u53ef\u5728\u7279\u5b9a\u786c\u4ef6\u4e0a\u8fd0\u884c\u3002
\n\u56e0\u4e3a\u540d\u79f0\u5c31\u662f\u540d\u79f0\u3002<\/p>\n

\r\npackage<\/span> thinkJava2<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ex1<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\/\/      this is my first Program<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello World\"<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Again\"<\/span>);<\/span>\r\n\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7b2c\u4e8c\u7ae0<\/p>\n
\u8a5e\u5f59<\/p>\n
\u53d8\u91cf\uff1a
\n\u503c\uff1a
\n\u7c7b\u578b\uff1a
\n\u58f0\u660e\uff1a
\n\u8d4b\u503c\uff1a
\n\u521d\u59cb\u5316\uff1a
\n\u72b6\u6001\uff1a
\n\u5185\u5b58\u56fe\uff1a
\n\u8fd0\u7b97\u7b26\uff1a
\n\u64cd\u4f5c\u6570\uff1a
\n\u8868\u8fbe\u5f0f\uff1a
\n\u6d6e\u70b9\u6570\uff1a
\n\u820d\u5165\u8bef\u5dee\uff1a
\n\u8fd0\u7b97\u987a\u5e8f\uff1a
\n\u7f16\u8bd1\u65f6\u9519\u8bef\uff1a
\n\u89e3\u6790\uff1a
\n\u903b\u8f91\u9519\u8bef\uff1a<\/p>\n
\u7a0b\u5e8f\u6e90\u4ee3\u7801
\n<\/a><\/p>\n
public<\/span> class<\/span> FloatingPoint<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        double<\/span> pi<\/span>;<\/span>\r\n        pi<\/span> =<\/span> 3.14159<\/span>;<\/span>\r\n\r\n        double<\/span> minute3<\/span> =<\/span> 59.0<\/span>;<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>\"Fraction of the hour that has passed: \"<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>minute3<\/span> \/<\/span> 60.0<\/span>);<\/span>\r\n\r\n        double<\/span> y<\/span> =<\/span> 1.0<\/span> \/<\/span> 3.0<\/span>;<\/span>  \/\/ correct<\/span>\r\n\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>0.1<\/span> *<\/span> 10<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>0.1<\/span> +<\/span> 0.1<\/span> +<\/span> 0.1<\/span> +<\/span> 0.1<\/span> +<\/span> 0.1<\/span>\r\n                         +<\/span> 0.1<\/span> +<\/span> 0.1<\/span> +<\/span> 0.1<\/span> +<\/span> 0.1<\/span> +<\/span> 0.1<\/span>);<\/span>\r\n\r\n        double<\/span> balance<\/span> =<\/span> 123.45<\/span>;<\/span>  \/\/ potential rounding error<\/span>\r\n        int<\/span> balance2<\/span> =<\/span> 12345<\/span>;<\/span>     \/\/ total number of cents<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\npublic<\/span> class<\/span> StringConcat<\/span> {<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>1<\/span> +<\/span> 2<\/span> +<\/span> \"Hello\"<\/span>);<\/span>\r\n        \/\/ the output is 3Hello<\/span>\r\n\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Hello\"<\/span> +<\/span> 1<\/span> +<\/span> 2<\/span>);<\/span>\r\n        \/\/ the output is Hello12<\/span>\r\n\r\n    }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u89e3\u51b3\u65b9\u6848<\/p>\n
\/\/<\/span>\r\n\/\/  Date.java<\/span>\r\n\/\/  ThinkJava-Chapter2<\/span>\r\n\/\/<\/span>\r\n\/\/  Created by Apollo Zhu on 7\/20\/16.<\/span>\r\n\/\/  Copyright \u00a9 2015-2016 WWITDC. All rights reserved.<\/span>\r\n\/\/<\/span>\r\n\r\npublic<\/span> class<\/span> Date<\/span>{<\/span>\r\n   \r\n   public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n   \r\n      String<\/span> day<\/span> =<\/span> \"Wednesday\"<\/span>,<\/span> month<\/span> =<\/span> \"July\"<\/span>;<\/span>\r\n      int<\/span> date<\/span> =<\/span> 20<\/span>,<\/span> year<\/span> =<\/span> 2016<\/span>;<\/span>\r\n      \r\n      System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"American format:\"<\/span>);<\/span>\r\n      System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>day<\/span> +<\/span> \", \"<\/span> +<\/span> month<\/span> +<\/span> \" \"<\/span> +<\/span> date<\/span> +<\/span> \", \"<\/span> +<\/span> year<\/span>);<\/span>\r\n      System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"European format:\"<\/span>);<\/span>\r\n      System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>day<\/span> +<\/span> \" \"<\/span> +<\/span> date<\/span> +<\/span> \" \"<\/span> +<\/span> month<\/span> +<\/span> \" \"<\/span> +<\/span> year<\/span>);<\/span>\r\n   \r\n   }<\/span>\r\n   \r\n}<\/span>\r\n\/\/<\/span>\r\n\/\/  Time.java<\/span>\r\n\/\/  ThinkJava-Chapter2<\/span>\r\n\/\/<\/span>\r\n\/\/  Created by Apollo Zhu on 7\/20\/16.<\/span>\r\n\/\/  Copyright \u00a9 2015-2016 WWITDC WWITDC. All rights reserved.<\/span>\r\n\/\/<\/span>\r\n\r\npublic<\/span> class<\/span> Time<\/span>{<\/span>\r\n   public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n   \r\n      int<\/span> timeOfDayInSeconds<\/span> =<\/span> 24<\/span> *<\/span> 60<\/span> *<\/span> 60<\/span>;<\/span>\r\n   \r\n      int<\/span> hour<\/span> =<\/span> 18<\/span>,<\/span> minute<\/span> =<\/span> 58<\/span>,<\/span> second<\/span> =<\/span> 10<\/span>;<\/span>\r\n      int<\/span> timeSinceMidnightInSeconds<\/span> =<\/span> hour<\/span> *<\/span> 3600<\/span> +<\/span> minute<\/span> *<\/span> 60<\/span> +<\/span> second<\/span>;<\/span>\r\n   \r\n      int<\/span> timeLeftInSeconds<\/span> =<\/span> timeOfDayInSeconds<\/span> -<\/span> timeSinceMidnightInSeconds<\/span>;<\/span>\r\n   \r\n      int<\/span> startHour<\/span> =<\/span> 18<\/span>,<\/span> startMinute<\/span> =<\/span> 45<\/span>,<\/span> startSecond<\/span> =<\/span> 36<\/span>;<\/span>\r\n      int<\/span> startTimeSinceMidnightInSeconds<\/span> =<\/span> startHour<\/span> *<\/span> 3600<\/span> +<\/span> startMinute<\/span> *<\/span> 60<\/span> +<\/span> startSecond<\/span>;<\/span> \/\/in seconds<\/span>\r\n   \r\n      int<\/span> timeInterval<\/span> =<\/span> timeSinceMidnightInSeconds<\/span> -<\/span> startTimeSinceMidnightInSeconds<\/span>;<\/span>\r\n   \r\n      System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Time since midnight: \"<\/span> +<\/span> timeSinceMidnightInSeconds<\/span> +<\/span> \" seconds\"<\/span>);<\/span>\r\n      System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Time remaining today: \"<\/span> +<\/span> timeLeftInSeconds<\/span> +<\/span> \" seconds\"<\/span>);<\/span> \r\n      System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Percentage of day passed: \"<\/span> +<\/span> (<\/span>double<\/span>)<\/span>timeSinceMidnightInSeconds<\/span> \/<\/span> (<\/span>double<\/span>)(<\/span>24<\/span> *<\/span> 60<\/span> *<\/span>60<\/span>)<\/span> +<\/span>\"%\"<\/span>);<\/span>\r\n      System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Elapsed time: \"<\/span> +<\/span> timeInterval<\/span> +<\/span> \" seconds\"<\/span>);<\/span>\r\n      \r\n   }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7b2c\u4e09\u7ae0<\/p>\n
\u6211\u8ba4\u4e3a\u95ee\u9898\u90fd\u89e3\u51b3\u4e86\u5f88\u597d\u3002\u8fd9\u53ef\u80fd\u4e0e\u5f15\u5165\u6d4b\u8bd5\u7a0b\u5e8f\u6709\u5173\u3002<\/p>\n
\u8a5e\u5f59<\/p>\n
\u5305\u88dd\uff1a
\n\u5730\u5740\uff1a
\n\u5716\u66f8\u9928\uff1a
\n\u5f15\u5165\u8a9e\u53e5\uff1a
\n\u6191\u8b49\uff1a
\n\u5b57\u9762\uff1a
\n\u63d0\u793a\uff1a
\n\u795e\u5947\u6578\u5b57\uff1a
\n\u5e38\u91cf\uff1a
\n\u683c\u5f0f\u5316\u6307\u793a\u7b26\uff1a
\n\u5806\u68e7\u8ddf\u8e2a\uff1a
\n\u985e\u578b\u8f49\u63db\uff1a
\n\u53d6\u6a21\uff1a
\n\u9918\u6578\uff1a<\/p>\n
import<\/span> java.util.Scanner<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ex3_2<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        Scanner<\/span> in<\/span> =<\/span> new<\/span> Scanner<\/span>(<\/span>System<\/span>.<\/span>in<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>\"Please write temperature (Celsius?)\"<\/span>);<\/span>\r\n        double<\/span> clss<\/span> =<\/span> in<\/span>.<\/span>nextDouble<\/span>();<\/span>\r\n        double<\/span> fhrnht<\/span> =<\/span> convertsTemperatureFromCelsius<\/span>(<\/span>clss<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"%.1f C = %.1f F\\n\"<\/span>,<\/span> clss<\/span>,<\/span> fhrnht<\/span>);<\/span>\r\n\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> double<\/span> convertsTemperatureFromCelsius<\/span>(<\/span>double<\/span> clss<\/span>)<\/span> {<\/span>\r\n        double<\/span> fhrnht<\/span> =<\/span> clss<\/span> *<\/span> 9<\/span>\/<\/span>5<\/span> +<\/span> 32<\/span>;<\/span>\r\n        return<\/span> fhrnht<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nex3_3<\/span>\r\nimport<\/span> java.util.Scanner<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ex3_3<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        int<\/span> h<\/span> =<\/span> 0<\/span>;<\/span>\r\n        int<\/span> minutes<\/span> =<\/span> 0<\/span>;<\/span>\r\n        int<\/span> second<\/span> =<\/span> 0<\/span>;<\/span>\r\n        int<\/span>[]<\/span> array<\/span> =<\/span> {<\/span>h<\/span>,<\/span> minutes<\/span>,<\/span> second<\/span>};<\/span>\r\n        Scanner<\/span> in<\/span> =<\/span> new<\/span> Scanner<\/span>(<\/span>System<\/span>.<\/span>in<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>\"Please write second\"<\/span>);<\/span>\r\n        int<\/span> bSeconds<\/span>=<\/span> in<\/span>.<\/span>nextInt<\/span>();<\/span>\r\n        array<\/span> =<\/span> convertsTotalNumberOfSecondsToHoursMinutesSeconds<\/span>(<\/span>bSeconds<\/span>);<\/span>\r\n        \/\/\"5000 seconds = 1 hours, 23 minutes, and 20 seconds\".<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"%d seconds = %d hours, %d minutes, and %d seconds\\n\"<\/span>,<\/span> bSeconds<\/span>,<\/span> array<\/span>[<\/span>0<\/span>],<\/span> array<\/span>[<\/span>1<\/span>],<\/span> array<\/span>[<\/span>2<\/span>]);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> int<\/span>[]<\/span> convertsTotalNumberOfSecondsToHoursMinutesSeconds<\/span>(<\/span>int<\/span> bSecond<\/span>)<\/span> {<\/span>\r\n        int<\/span> h<\/span> =<\/span> 0<\/span>;<\/span>\r\n        int<\/span> m<\/span> =<\/span> 0<\/span>;<\/span>\r\n        int<\/span> s<\/span> =<\/span> 0<\/span>;<\/span>\r\n        int<\/span>[]<\/span> array<\/span> =<\/span> {<\/span>h<\/span>,<\/span> m<\/span>,<\/span> s<\/span>};<\/span>\r\n        h<\/span> =<\/span> bSecond<\/span> \/<\/span> 60<\/span> \/<\/span> 60<\/span>;<\/span>\r\n        s<\/span> =<\/span> bSecond<\/span> %<\/span> 60<\/span>;<\/span>\r\n        m<\/span> =<\/span> (<\/span>bSecond<\/span> -<\/span> h<\/span> *<\/span> 60<\/span> *<\/span> 60<\/span> -<\/span> s<\/span>)<\/span> \/<\/span> 60<\/span>;<\/span>\r\n        array<\/span>[<\/span>0<\/span>]<\/span> =<\/span> h<\/span>;<\/span>\r\n        array<\/span>[<\/span>1<\/span>]<\/span> =<\/span> m<\/span>;<\/span>\r\n        array<\/span>[<\/span>2<\/span>]<\/span> =<\/span> s<\/span>;<\/span>\r\n        return<\/span> array<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\nex3_4<\/span>\r\n\r\nimport<\/span> java.util.Random<\/span>;<\/span>\r\nimport<\/span> java.util.Scanner<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ex3_4<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"I'm thinking of a number between 1 and 100\"<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"(including both). Can you guess what it is?\"<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Type a number:\"<\/span>);<\/span>\r\n\r\n        Scanner<\/span> in<\/span> =<\/span> new<\/span> Scanner<\/span>(<\/span>System<\/span>.<\/span>in<\/span>);<\/span>\r\n        int<\/span> number<\/span> =<\/span> in<\/span>.<\/span>nextInt<\/span>();<\/span>\r\n        int<\/span> guessMyNumber<\/span> =<\/span> guessMyNumber<\/span>();<\/span>\r\n        int<\/span> off<\/span> =<\/span> 0<\/span>;<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"Your guess is:%d\\n\"<\/span>,<\/span> number<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"I was thinking of is:%d\\n\"<\/span>,<\/span> guessMyNumber<\/span>);<\/span>\r\n        if<\/span> (<\/span>number<\/span> ><\/span> guessMyNumber<\/span>){<\/span>\r\n            off<\/span> =<\/span> number<\/span> -<\/span> guessMyNumber<\/span>;<\/span>\r\n        }<\/span>\r\n        if<\/span> (<\/span>number<\/span> <<\/span> guessMyNumber<\/span>){<\/span>\r\n            off<\/span> =<\/span> guessMyNumber<\/span> -<\/span> number<\/span>;<\/span>\r\n        }<\/span>\r\n        if<\/span> (<\/span>guessMyNumber<\/span> ==<\/span> number<\/span>){<\/span>\r\n            off<\/span> =<\/span> 0<\/span>;<\/span>\r\n        }<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"You were off by:%d\\n\"<\/span>,<\/span> off<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> int<\/span> guessMyNumber<\/span>()<\/span> {<\/span>\r\n        \/\/ pick a random number<\/span>\r\n        Random<\/span> random<\/span> =<\/span> new<\/span> Random<\/span>();<\/span>\r\n        int<\/span> number<\/span> =<\/span> random<\/span>.<\/span>nextInt<\/span>(<\/span>100<\/span>)<\/span> +<\/span> 1<\/span>;<\/span>\r\n        return<\/span> number<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u7b2c\u56db\u7ae0<\/p>\n
\u8a5e\u5f59<\/p>\n
void:
\n\u7a7a\uff08\u7684\uff09<\/p>\n
invoke:
\n\u8c03\u7528<\/p>\n
flow of execution:
\n\u6267\u884c\u6d41\u7a0b<\/p>\n
argument:
\n\u53c2\u6570<\/p>\n
parameter:
\n\u5f62\u53c2<\/p>\n
parameter passing:
\n\u53c2\u6570\u4f20\u9012<\/p>\n
local variable:
\n\u5c40\u90e8\u53d8\u91cf<\/p>\n
stack diagram:
\n\u6808\u56fe<\/p>\n
frame:
\n\u5e27<\/p>\n
scope:
\n\u4f5c\u7528\u57df<\/p>\n
composition:
\n\u7ec4\u5408<\/p>\n
return type:
\n\u8fd4\u56de\u7c7b\u578b<\/p>\n
return value:
\n\u8fd4\u56de\u503c<\/p>\n
stub:
\n\u5b58\u6839<\/p>\n
\u89e3\u51b3\u65b9\u6848  ‘\u00e0n)<\/p>\n
 ex4_1<\/span>\r\n\r\npackage<\/span> ex4<\/span>;<\/span>\r\n\r\n\r\npublic<\/span> class<\/span> ex4_1<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[])<\/span> {<\/span>\r\n\r\n        printAmerican<\/span>(<\/span>\"Wednesday\"<\/span>,<\/span> \"July\"<\/span>,<\/span> 20<\/span>,<\/span> 2016<\/span>);<\/span>\r\n        printEuropean<\/span>(<\/span>\"Wednesday\"<\/span>,<\/span> \"July\"<\/span>,<\/span> 20<\/span>,<\/span> 2016<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    private<\/span> static<\/span> void<\/span> printAmerican<\/span>(<\/span>String<\/span> day<\/span>,<\/span> String<\/span> month<\/span>,<\/span> int<\/span> date<\/span>,<\/span> int<\/span> year<\/span>)<\/span> {<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"American format:\"<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>day<\/span> +<\/span> \", \"<\/span> +<\/span> month<\/span> +<\/span> \" \"<\/span> +<\/span> date<\/span> +<\/span> \", \"<\/span> +<\/span> year<\/span>);<\/span>\r\n\r\n    }<\/span>\r\n\r\n    private<\/span> static<\/span> void<\/span> printEuropean<\/span>(<\/span>String<\/span> day<\/span>,<\/span> String<\/span> month<\/span>,<\/span> int<\/span> date<\/span>,<\/span> int<\/span> year<\/span>)<\/span> {<\/span>\r\n\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"European format:\"<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>day<\/span> +<\/span> \" \"<\/span> +<\/span> date<\/span> +<\/span> \" \"<\/span> +<\/span> month<\/span> +<\/span> \" \"<\/span> +<\/span> year<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
1. ans \u2192 \u7b2c\u4e94\u884c
\n2. ans \u2192 \u7b2c\u5341\u4e94\u884c
\n3. ans \u2192 \u54af\u54af\u58f0
\n4. ans \u2192 \u6293\u8033\u6320\u816e<\/p>\n
\n                            \"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8<\/p>\n
\u7b2c\u4e94\u7ae0<\/p>\n
\u8a5e\u5f59<\/p>\n
\u5e03\u5c14\u503c\uff1a\u53ea\u9700\u8981\u4e00\u4e2a\u9009\u9879\uff1a
\n\u5173\u7cfb\u8fd0\u7b97\u7b26\uff1a
\n\u6761\u4ef6\u8bed\u53e5\uff1a
\n\u5757\uff1a
\n\u5206\u652f\uff1a
\n\u94fe\u5f0f\u8c03\u7528\uff1a
\n\u5d4c\u5957\uff1a
\n\u903b\u8f91\u8fd0\u7b97\u7b26\uff1a
\n\u77ed\u8def\uff1a
\n\u5fb7\u6469\u6839\u5b9a\u5f8b\uff1a
\n\u6807\u8bb0\uff1a
\n\u9a8c\u8bc1\uff1a
\n\u9ed1\u5ba2\uff1a
\nNaN\uff1a<\/p>\n
ex5_1<\/span>\r\n\u7701\u7565<\/span>\r\n\r\nex5_2\u7701\u7565<\/span>\r\nublic<\/span> class<\/span> ex5_2<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"I'm thinking of a number between 1 and 100\"<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"(including both). Can you guess what it is?\"<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Type a number:\"<\/span>);<\/span>\r\n        int<\/span> time<\/span> =<\/span> 0<\/span>;<\/span>\r\n        int<\/span> off<\/span> =<\/span> 0<\/span>;<\/span>\r\n        getOff<\/span>(<\/span>off<\/span>,<\/span> time<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n\r\n    public<\/span> static<\/span> void<\/span> getOff<\/span>(<\/span>int<\/span> off<\/span>,<\/span> int<\/span> time<\/span>)<\/span> {<\/span>\r\n        Scanner<\/span> in<\/span> =<\/span> new<\/span> Scanner<\/span>(<\/span>System<\/span>.<\/span>in<\/span>);<\/span>\r\n        int<\/span> guessMyNumber<\/span> =<\/span> guessMyNumber<\/span>();<\/span>\r\n        int<\/span> number<\/span> =<\/span> in<\/span>.<\/span>nextInt<\/span>();<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"Your guess is:%d\\n\"<\/span>,<\/span> number<\/span>);<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"I was thinking of is:%d\\n\"<\/span>,<\/span> guessMyNumber<\/span>);<\/span>\r\n        if<\/span> (<\/span>number<\/span> ><\/span> guessMyNumber<\/span> &&<\/span> time<\/span> <<\/span> 3<\/span>)<\/span> {<\/span>\r\n            off<\/span> =<\/span> number<\/span> -<\/span> guessMyNumber<\/span>;<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"the guess is too high %d\\n\"<\/span>,<\/span> off<\/span>);<\/span>\r\n            off<\/span> =<\/span> 0<\/span>;<\/span>\r\n            time<\/span> +=<\/span> 1<\/span>;<\/span>\r\n            if<\/span> (<\/span>time<\/span> <<\/span> 3<\/span>)<\/span> {<\/span>\r\n                getOff<\/span>(<\/span>off<\/span>,<\/span> time<\/span>);<\/span>\r\n            }<\/span>\r\n\r\n        }<\/span>\r\n        if<\/span> (<\/span>number<\/span> <<\/span> guessMyNumber<\/span>)<\/span> {<\/span>\r\n            off<\/span> =<\/span> guessMyNumber<\/span> -<\/span> number<\/span>;<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"the guess is too low %d\\n\"<\/span>,<\/span> off<\/span>);<\/span>\r\n            off<\/span> =<\/span> 0<\/span>;<\/span>\r\n            time<\/span> +=<\/span> 1<\/span>;<\/span>\r\n            if<\/span> (<\/span>time<\/span> <<\/span> 3<\/span>)<\/span> {<\/span>\r\n                getOff<\/span>(<\/span>off<\/span>,<\/span> time<\/span>);<\/span>\r\n            }<\/span>\r\n\r\n        }<\/span>\r\n        if<\/span> (<\/span>guessMyNumber<\/span> ==<\/span> number<\/span>)<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"the guess is correct\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> int<\/span> guessMyNumber<\/span>()<\/span> {<\/span>\r\n        \/\/ pick a random number<\/span>\r\n        Random<\/span> random<\/span> =<\/span> new<\/span> Random<\/span>();<\/span>\r\n        int<\/span> number<\/span> =<\/span> random<\/span>.<\/span>nextInt<\/span>(<\/span>100<\/span>)<\/span> +<\/span> 1<\/span>;<\/span>\r\n        return<\/span> number<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\npublic<\/span> class<\/span> ex5_3<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        method<\/span>(<\/span>1<\/span>,<\/span>1<\/span>,<\/span>1<\/span>,<\/span>3<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> method<\/span>(<\/span>int<\/span> a<\/span>,<\/span> int<\/span> b<\/span>,<\/span> int<\/span> c<\/span>,<\/span> int<\/span> n<\/span>)<\/span> {<\/span>\r\n        if<\/span> (!(<\/span>n<\/span> <=<\/span> 2<\/span>))<\/span>\r\n        {<\/span>\r\n            boolean<\/span> b1<\/span>;<\/span>\r\n            if<\/span> ((<\/span>int<\/span>)<\/span> Math<\/span>.<\/span>pow<\/span>(<\/span>a<\/span>,<\/span> n<\/span>)<\/span> +<\/span> (<\/span>int<\/span>)<\/span> Math<\/span>.<\/span>pow<\/span>(<\/span>b<\/span>,<\/span> n<\/span>)<\/span> ==<\/span> (<\/span>int<\/span>)<\/span> Math<\/span>.<\/span>pow<\/span>(<\/span>c<\/span>,<\/span> n<\/span>))<\/span> b1<\/span> =<\/span> true<\/span>;<\/span>\r\n            else<\/span> b1<\/span> =<\/span> false<\/span>;<\/span>\r\n            if<\/span> (<\/span>b1<\/span>){<\/span>\r\n                System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Holy smokes, Fermat was wrong!\"<\/span>);<\/span>\r\n            }<\/span>else<\/span>{<\/span>\r\n                System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"No, that doesn\u2019t work.\"<\/span>);<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\nex5_4<\/span>\r\n\u8868\u73fe<\/span>\t\u7d50\u679c<\/span>\r\nyes<\/span> ==<\/span> no<\/span> ||<\/span> grade<\/span> ><\/span> amount<\/span>\t     true<\/span>\r\namount<\/span> ==<\/span> 40.0<\/span> ||<\/span> 50.0<\/span>\t         error<\/span>\r\nhiVal<\/span> !=<\/span> loVal<\/span> ||<\/span> loVal<\/span> <<\/span> 0<\/span>\t \t true<\/span>\r\nTrue<\/span> ||<\/span> hello<\/span>.<\/span>length<\/span>()<\/span> ><\/span> 0<\/span>\t  true<\/span>\r\nhello<\/span>.<\/span>isEmpty<\/span>()<\/span> &&<\/span> yes<\/span>\t false<\/span>\r\ngrade<\/span> <=<\/span> 100<\/span> &&<\/span> !<\/span>false<\/span>\ttrue<\/span> \r\n!<\/span>yes<\/span> ||<\/span> no<\/span>\t false<\/span>\r\ngrade<\/span> ><\/span> 75<\/span> ><\/span> amount<\/span>\t error<\/span>\r\namount<\/span> <=<\/span> hiVal<\/span> &&<\/span> amount<\/span> >=<\/span> loVal<\/span>\t true<\/span>\r\nno<\/span> &&<\/span> !<\/span>no<\/span> ||<\/span> yes<\/span> &&<\/span> !<\/span>yes<\/span>\tfalse<\/span> \r\n\r\nex5_5<\/span>\r\ntrue<\/span>\r\ntrue<\/span>\r\nping<\/span>!<\/span>\r\npong<\/span>\r\n\r\nex5_6<\/span>\r\n\r\npackage<\/span> ex5<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ex5_6<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        int<\/span> a<\/span> =<\/span> 1<\/span>;<\/span>\r\n        int<\/span> b<\/span> =<\/span> 1<\/span>;<\/span>\r\n        int<\/span> c<\/span> =<\/span> 1<\/span>;<\/span>\r\n        double<\/span>[]<\/span> root<\/span> =<\/span> method<\/span>(<\/span>a<\/span>,<\/span> b<\/span>,<\/span> c<\/span>);<\/span>\r\n        if<\/span> (<\/span>root<\/span>.<\/span>equals<\/span>(<\/span>null<\/span>))<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Test\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> double<\/span>[]<\/span> method<\/span>(<\/span>int<\/span> a<\/span>,<\/span> int<\/span> b<\/span>,<\/span> int<\/span> c<\/span>)<\/span> {<\/span>\r\n        double<\/span> root1<\/span> =<\/span> 0.0<\/span>;<\/span>\r\n        double<\/span> root2<\/span> =<\/span> 0.0<\/span>;<\/span>\r\n        int<\/span> determinant<\/span> =<\/span> b<\/span> *<\/span> b<\/span> -<\/span> 4<\/span> *<\/span> a<\/span> *<\/span> c<\/span>;<\/span>\r\n        if<\/span> (<\/span>2<\/span> *<\/span> a<\/span> !=<\/span> 0<\/span>)<\/span> {<\/span>\r\n            if<\/span> (<\/span>determinant<\/span> ><\/span> 0<\/span>)<\/span> {<\/span>\r\n                root1<\/span> =<\/span> (-<\/span>b<\/span> +<\/span> Math<\/span>.<\/span>sqrt<\/span>(<\/span>determinant<\/span>))<\/span> \/<\/span> 2<\/span> *<\/span> a<\/span>;<\/span>\r\n                root2<\/span> =<\/span> (-<\/span>b<\/span> -<\/span> Math<\/span>.<\/span>sqrt<\/span>(<\/span>determinant<\/span>))<\/span> \/<\/span> 2<\/span> *<\/span> a<\/span>;<\/span>\r\n                System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"root1 = %.2f and root2 = %.2f\\n\"<\/span>,<\/span> root1<\/span>,<\/span> root2<\/span>);<\/span>\r\n            }<\/span> else<\/span> if<\/span> (<\/span>determinant<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>\r\n                root1<\/span> =<\/span> (-<\/span>b<\/span> +<\/span> Math<\/span>.<\/span>sqrt<\/span>(<\/span>determinant<\/span>))<\/span> \/<\/span> 2<\/span> *<\/span> a<\/span>;<\/span>\r\n                root2<\/span> =<\/span> (-<\/span>b<\/span> -<\/span> Math<\/span>.<\/span>sqrt<\/span>(<\/span>determinant<\/span>))<\/span> \/<\/span> 2<\/span> *<\/span> a<\/span>;<\/span>\r\n                System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"root1 = root2 = %.2f\\n\"<\/span>,<\/span> root1<\/span>);<\/span>\r\n            }<\/span> else<\/span> {<\/span>\r\n                System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"invalid input. %d,%d,%d\\n\"<\/span>,<\/span> a<\/span>,<\/span> b<\/span>,<\/span> c<\/span>);<\/span>\r\n                double<\/span>[]<\/span> root<\/span> =<\/span> {<\/span>999.0<\/span>};<\/span>\r\n                return<\/span> root<\/span>;<\/span>\r\n            }<\/span>\r\n        }<\/span> else<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>printf<\/span>(<\/span>\"invalid input. %d,%d,%d\\n\"<\/span>,<\/span> a<\/span>,<\/span> b<\/span>,<\/span> c<\/span>);<\/span>\r\n            double<\/span>[]<\/span> root<\/span> =<\/span> {<\/span>999.0<\/span>};<\/span>\r\n            return<\/span> root<\/span>;<\/span>\r\n        }<\/span>\r\n        double<\/span> root<\/span>[]<\/span> =<\/span> {<\/span>root1<\/span>,<\/span> root2<\/span>};<\/span>\r\n        return<\/span> root<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\npackage<\/span> ex5<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ex5_7<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"Test\"<\/span>);<\/span>\r\n        \/\/Display an error if any of the lengths are negative or zero.<\/span>\r\n        int<\/span> a<\/span> =<\/span> 3<\/span>;<\/span>\r\n        int<\/span> b<\/span> =<\/span> 4<\/span>;<\/span>\r\n        int<\/span> c<\/span> =<\/span> 5<\/span>;<\/span>\r\n\r\n        String<\/span> answer<\/span> =<\/span> method<\/span>(<\/span>a<\/span>,<\/span> b<\/span>,<\/span> c<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> String<\/span> method<\/span>(<\/span>int<\/span> a<\/span>,<\/span> int<\/span> b<\/span>,<\/span> int<\/span> c<\/span>)<\/span> {<\/span>\r\n        if<\/span> (!(<\/span>a<\/span> <<\/span> 0<\/span> ||<\/span> b<\/span> <<\/span> 0<\/span> ||<\/span> c<\/span> <<\/span> 0<\/span>)<\/span> ||<\/span> (!(<\/span>a<\/span> ==<\/span> 0<\/span> ||<\/span> b<\/span> ==<\/span> 0<\/span> ||<\/span> c<\/span> ==<\/span> 0<\/span>)))<\/span> {<\/span>\r\n            if<\/span> ((<\/span>a<\/span> +<\/span> b<\/span>)<\/span> <<\/span> c<\/span>)<\/span> {<\/span>\r\n                return<\/span> \"NG\"<\/span>;<\/span>\r\n            }<\/span> else<\/span> if<\/span> ((<\/span>b<\/span> +<\/span> c<\/span>)<\/span> <<\/span> a<\/span>)<\/span> {<\/span>\r\n                return<\/span> \"NG\"<\/span>;<\/span>\r\n            }<\/span> else<\/span> if<\/span> ((<\/span>c<\/span> +<\/span> a<\/span>)<\/span> <<\/span> b<\/span>)<\/span> {<\/span>\r\n                return<\/span> \"NG\"<\/span>;<\/span>\r\n            }<\/span> else<\/span> {<\/span>\r\n                return<\/span> \"OK\"<\/span>;<\/span>\r\n            }<\/span>\r\n        }<\/span> else<\/span> {<\/span>\r\n            return<\/span> \"NG\"<\/span>;<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\npackage<\/span> ex5<\/span>;<\/span>\r\n\r\nimport<\/span> org.junit.jupiter.api.Test<\/span>;<\/span>\r\n\r\nimport<\/span> static<\/span> org<\/span>.<\/span>junit<\/span>.<\/span>jupiter<\/span>.<\/span>api<\/span>.<\/span>Assertions<\/span>.*;<\/span>\r\n\r\nclass<\/span> ex5_7Test<\/span> {<\/span>\r\n\r\n    @Test<\/span>\r\n    void<\/span> method<\/span>()<\/span> {<\/span>\r\n        assertAll<\/span>(<\/span>\r\n                ()<\/span> -><\/span> assertEquals<\/span>(<\/span>\"OK\"<\/span>,<\/span> (<\/span>ex5_7<\/span>.<\/span>method<\/span>(<\/span>3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>))),<\/span>\r\n                ()<\/span> -><\/span> assertEquals<\/span>(<\/span>\"NG\"<\/span>,<\/span> (<\/span>ex5_7<\/span>.<\/span>method<\/span>(-<\/span>3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>))),<\/span>\r\n                ()<\/span> -><\/span> assertEquals<\/span>(<\/span>\"NG\"<\/span>,<\/span> (<\/span>ex5_7<\/span>.<\/span>method<\/span>(<\/span>3<\/span>,<\/span> 0<\/span>,<\/span> 5<\/span>))),<\/span>\r\n                ()<\/span> -><\/span> assertEquals<\/span>(<\/span>\"OK\"<\/span>,<\/span> (<\/span>ex5_7<\/span>.<\/span>method<\/span>(<\/span>1<\/span>,<\/span> 1<\/span>,<\/span> 1<\/span>)))<\/span>\r\n        );<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7b2c\u516d\u7ae0<\/p>\n
\u8a5e\u5f59<\/p>\n
\u5faa\u73af\uff1a
\n\u5faa\u73af\u4f53\uff1a
\n\u65e0\u9650\u5faa\u73af\uff1a
\n\u589e\u52a0\uff1a
\n\u51cf\u5c11\uff1a
\n\u8fed\u4ee3\uff1a
\n\u5faa\u73af\u53d8\u91cf\uff1a
\n\u7d22\u5f15\uff1a
\nUnicode\uff1a
\n\u7a7a\u5b57\u7b26\u4e32\uff1a
\n\u91cd\u8f7d\uff1a<\/p>\n
ex6_3<\/span>\r\npackage<\/span> ex6<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ex6_2<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        double<\/span> a<\/span> =<\/span> 9<\/span>;<\/span>\r\n        squareRoot<\/span>(<\/span>a<\/span>);<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> double<\/span> squareRoot<\/span>(<\/span>double<\/span> a<\/span>)<\/span> {<\/span>\r\n        double<\/span> oldValue<\/span> =<\/span> a<\/span> \/<\/span> 2<\/span>;<\/span>\r\n        double<\/span> newValue<\/span> =<\/span> a<\/span> \/<\/span> 2<\/span>;<\/span>\r\n        double<\/span> interval<\/span> =<\/span> 0<\/span>;<\/span>\r\n        do<\/span> {<\/span>\r\n            oldValue<\/span> =<\/span> newValue<\/span>;<\/span>\r\n            newValue<\/span> =<\/span> (<\/span>oldValue<\/span> +<\/span> a<\/span> \/<\/span> oldValue<\/span>)<\/span> \/<\/span> 2<\/span>;<\/span>\r\n            interval<\/span> =<\/span> Math<\/span>.<\/span>abs<\/span>(<\/span>newValue<\/span> -<\/span> oldValue<\/span>);<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>interval<\/span>);<\/span>\r\n        }<\/span> while<\/span> (<\/span>interval<\/span> ><\/span> 0.001<\/span>);<\/span>\r\n        return<\/span> newValue<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\npublic<\/span> class<\/span> ex6_3<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>gauss<\/span>(<\/span>1<\/span>,<\/span> 2<\/span>));<\/span>\r\n    }<\/span>\r\n\r\n\r\n    public<\/span> static<\/span> double<\/span> gauss<\/span>(<\/span>double<\/span> x<\/span>,<\/span> int<\/span> n<\/span>)<\/span> {<\/span>\r\n        double<\/span> result<\/span> =<\/span> 1<\/span>;<\/span>\r\n        int<\/span> q<\/span> =<\/span> 1<\/span>;<\/span>\r\n        double<\/span> p<\/span> =<\/span> 1<\/span>;<\/span>\r\n        int<\/span> pre<\/span> =<\/span> 1<\/span>;<\/span>\r\n        for<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 1<\/span>;<\/span> i<\/span> <<\/span> n<\/span>;<\/span> i<\/span>++)<\/span> {<\/span>\r\n            result<\/span> +=<\/span> (<\/span>pre<\/span> *=<\/span> -<\/span>1<\/span>)<\/span> *<\/span> (<\/span>p<\/span> *=<\/span> x<\/span> *<\/span> x<\/span>)<\/span> \/<\/span> (<\/span>q<\/span> *=<\/span> i<\/span>);<\/span>\r\n        }<\/span>\r\n        return<\/span> result<\/span>;<\/span>\r\n    }<\/span>\r\n}<\/span>\r\npackage<\/span> ex6<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ex6_4<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> Boolean<\/span> isAbecedarian<\/span>(<\/span>String<\/span> s<\/span>)<\/span> {<\/span>\r\n\r\n        if<\/span> (<\/span>s<\/span>.<\/span>length<\/span>()<\/span> !=<\/span> 6<\/span>)<\/span> {<\/span>\r\n            return<\/span> false<\/span>;<\/span>\r\n        }<\/span> else<\/span> {<\/span>\r\n            char<\/span>[]<\/span> chars<\/span> =<\/span> s<\/span>.<\/span>toCharArray<\/span>();<\/span>\r\n            String<\/span> temp<\/span> =<\/span> new<\/span> String<\/span>(<\/span>chars<\/span>);<\/span>\r\n\r\n            if<\/span> (<\/span>temp<\/span>.<\/span>equals<\/span>(<\/span>s<\/span>))<\/span> {<\/span>\r\n                return<\/span> true<\/span>;<\/span>\r\n            }<\/span> else<\/span> {<\/span>\r\n                return<\/span> false<\/span>;<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\npackage<\/span> ex6<\/span>;<\/span>\r\n\r\nimport<\/span> java.util.ArrayList<\/span>;<\/span>\r\nimport<\/span> java.util.HashMap<\/span>;<\/span>\r\nimport<\/span> java.util.List<\/span>;<\/span>\r\nimport<\/span> java.util.Locale<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ex6_5<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>doubloon<\/span>(<\/span>\"teet\"<\/span>));<\/span>\r\n\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> boolean<\/span> doubloon<\/span>(<\/span>String<\/span> s<\/span>)<\/span> {<\/span>\r\n        boolean<\/span> flag<\/span> =<\/span> true<\/span>;<\/span>\r\n        int<\/span> len<\/span> =<\/span> s<\/span>.<\/span>length<\/span>();<\/span>\r\n        int<\/span> count<\/span>;<\/span>\r\n\r\n        if<\/span> (<\/span>len<\/span> %<\/span> 2<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>\r\n            for<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> (<\/span>len<\/span>);<\/span> i<\/span>++)<\/span> {<\/span>\r\n                count<\/span> =<\/span> 2<\/span>;<\/span>\r\n                for<\/span> (<\/span>int<\/span> j<\/span> =<\/span> 0<\/span>;<\/span> j<\/span> <<\/span> (<\/span>len<\/span>);<\/span> j<\/span>++)<\/span> {<\/span>\r\n                    if<\/span> (<\/span>s<\/span>.<\/span>charAt<\/span>(<\/span>i<\/span>)<\/span> ==<\/span> s<\/span>.<\/span>charAt<\/span>(<\/span>j<\/span>))<\/span> {<\/span>\r\n                        count<\/span>--;<\/span>\r\n                    }<\/span>\r\n                }<\/span>\r\n                if<\/span> (<\/span>count<\/span> !=<\/span> 0<\/span>)<\/span> {<\/span>\r\n                    flag<\/span> =<\/span> false<\/span>;<\/span>\r\n                    break<\/span>;<\/span>\r\n                }<\/span>\r\n\r\n            }<\/span>\r\n        }<\/span> else<\/span> {<\/span>\r\n            flag<\/span> =<\/span> false<\/span>;<\/span>\r\n        }<\/span>\r\n        return<\/span> flag<\/span>;<\/span>\r\n\r\n    }<\/span>\r\n}<\/span>\r\n\r\npublic<\/span> class<\/span> ex6_6<\/span> {<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> int<\/span>[]<\/span> letterHist<\/span>(<\/span>String<\/span> str<\/span>)<\/span> {<\/span>\r\n        char<\/span>[]<\/span> characters<\/span> =<\/span> str<\/span>.<\/span>toUpperCase<\/span>().<\/span>toCharArray<\/span>();<\/span>\r\n        int<\/span>[]<\/span> result<\/span> =<\/span> new<\/span> int<\/span>[<\/span>27<\/span>];<\/span>\r\n        for<\/span> (<\/span>char<\/span> letter<\/span> :<\/span> characters<\/span>)<\/span> {<\/span>\r\n            if<\/span> (<\/span>letter<\/span> >=<\/span> 65<\/span> &&<\/span> letter<\/span> <=<\/span> 90<\/span>)<\/span> {<\/span>\r\n                result<\/span>[<\/span>letter<\/span> -<\/span> 65<\/span>]<\/span> +=<\/span> 1<\/span>;<\/span>\r\n            }<\/span> else<\/span> if<\/span> (<\/span>letter<\/span> !=<\/span> 32<\/span>)<\/span> {<\/span>\r\n                result<\/span>[<\/span>27<\/span>]<\/span> +=<\/span> 1<\/span>;<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n        return<\/span> result<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n    public<\/span> static<\/span> boolean<\/span> canSpell<\/span>(<\/span>String<\/span> word<\/span>,<\/span> String<\/span> libchar<\/span>)<\/span> {<\/span>\r\n        int<\/span>[]<\/span> wordRequirment<\/span> =<\/span> letterHist<\/span>(<\/span>word<\/span>);<\/span>\r\n        int<\/span>[]<\/span> libCapacity<\/span> =<\/span> letterHist<\/span>(<\/span>libchar<\/span>);<\/span>\r\n        for<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> 26<\/span>;<\/span> i<\/span>++)<\/span> {<\/span>\r\n            if<\/span> (<\/span>wordRequirment<\/span>[<\/span>i<\/span>]<\/span> ><\/span> libCapacity<\/span>[<\/span>i<\/span>])<\/span> {<\/span>\r\n                return<\/span> false<\/span>;<\/span>\r\n            }<\/span>\r\n        }<\/span>\r\n        return<\/span> true<\/span>;<\/span>\r\n    }<\/span>\r\n\r\n\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u7b2c\u4e03\u7ae0<\/p>\n
\u8bcd\u6c47<\/p>\n
\u6570\u7ec4 :
\n\u5143\u7d20 :
\n\u5206\u914d :
\n\u5f15\u7528 :
\n\u7d22\u5f15 :
\n\u522b\u540d :
\n\u904d\u5386 :
\n\u641c\u7d22 :
\n\u51cf\u5c11 :
\n\u7d2f\u52a0\u5668 :
\n\u786e\u5b9a\u6027 :
\n\u975e\u786e\u5b9a\u6027  :
\n\u4f2a\u968f\u673a :
\n\u76f4\u65b9\u56fe :<\/p>\n
\u4ee5\u4e0b\u662f\u8be5\u7a0b\u5e8f\u7684\u6e90\u4ee3\u7801\uff1a<\/p>\n
https:\/\/github.com\/ChrisMayfield\/ThinkJavaCode2\/blob\/master\/ch07\/ArrayExamples.java<\/p>\n
##\u89e3\u51b3\u65b9\u6848<\/p>\n
ex8_1<\/span>\r\n   public<\/span> static<\/span> double<\/span>[]<\/span>powArray<\/span>(<\/span>double<\/span>[]<\/span> array<\/span>,<\/span> double<\/span> power<\/span>){<\/span>\r\n    \tdouble<\/span>[]<\/span> accumelator<\/span> =<\/span> new<\/span> double<\/span>[<\/span>array<\/span>.<\/span>length<\/span>];<\/span>\r\n    \tfor<\/span> (<\/span>int<\/span> i<\/span>=<\/span>0<\/span>;<\/span> i<\/span><<\/span>array<\/span>.<\/span>length<\/span>;<\/span>i<\/span>++)<\/span> {<\/span>\r\n    \t\taccumelator<\/span>[<\/span>i<\/span>]<\/span> =<\/span> Math<\/span>.<\/span>pow<\/span>(<\/span>array<\/span>[<\/span>i<\/span>],<\/span> power<\/span>);<\/span>  \t\t\r\n    \t}<\/span>\r\n    \treturn<\/span> accumelator<\/span>;<\/span>\r\n    }<\/span>\r\n    \r\n  \r\n    public<\/span> static<\/span> int<\/span>[]<\/span> histogram<\/span>(<\/span>int<\/span>[]<\/span> array<\/span>,<\/span> int<\/span> count<\/span>)<\/span> {<\/span>\r\n    \tint<\/span>[]<\/span> counter<\/span> =<\/span> new<\/span> int<\/span>[<\/span>count<\/span>];<\/span>\r\n    \tfor<\/span> (<\/span>int<\/span> element:<\/span>array<\/span>)<\/span> {<\/span>\r\n    \t\tcounter<\/span>[<\/span>element<\/span>]++;<\/span>\r\n    \t}<\/span>\r\n    \treturn<\/span> counter<\/span>;<\/span>\r\n    \t\r\n    }<\/span>\r\npackage<\/span> thinkJava<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> chap8_3<\/span> {<\/span>\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\t    int<\/span>[]<\/span> bob<\/span> =<\/span> make<\/span>(<\/span>5<\/span>);<\/span>\r\n\t    dub<\/span>(<\/span>bob<\/span>);<\/span>\r\n\t    System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>mus<\/span>(<\/span>bob<\/span>));<\/span>\r\n\t}<\/span>\r\n\r\n\tpublic<\/span> static<\/span> int<\/span>[]<\/span> make<\/span>(<\/span>int<\/span> n<\/span>)<\/span> {<\/span>\r\n\t\tint<\/span>[]<\/span> a<\/span> =<\/span> new<\/span> int<\/span>[<\/span>n<\/span>];<\/span>\r\n\t\tfor<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> n<\/span>;<\/span> i<\/span>++)<\/span> {<\/span>\r\n\t\t\ta<\/span>[<\/span>i<\/span>]<\/span> =<\/span> i<\/span> +<\/span> 1<\/span>;<\/span>\r\n\t\t}<\/span>\r\n\t\treturn<\/span> a<\/span>;<\/span>\r\n\t}<\/span>\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> dub<\/span>(<\/span>int<\/span>[]<\/span> jub<\/span>)<\/span> {<\/span>\r\n\t\tfor<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> jub<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++)<\/span> {<\/span>\r\n\t\t\tjub<\/span>[<\/span>i<\/span>]<\/span> *=<\/span> 2<\/span>;<\/span>\r\n\t\t}<\/span>\r\n\t}<\/span>\r\n\r\n\t\/**\r\n\t * Calculates the summary of adding all elements in `zoo` reduce(0) {$0 + $1}\r\n\t *\/<\/span>\r\n\tpublic<\/span> static<\/span> int<\/span> mus<\/span>(<\/span>int<\/span>[]<\/span> zoo<\/span>)<\/span> {<\/span>\r\n\t\tint<\/span> fus<\/span> =<\/span> 0<\/span>;<\/span>\r\n\t\tfor<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> zoo<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++)<\/span> {<\/span>\r\n\t\t\tfus<\/span> +=<\/span> zoo<\/span>[<\/span>i<\/span>];<\/span>\r\n\t\t}<\/span>\r\n\t\treturn<\/span> fus<\/span>;<\/span>\r\n\t}<\/span>\r\n\r\n}<\/span>\r\npackage<\/span> thinkJava<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> chap8_5<\/span> {<\/span>\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\t\tboolean<\/span> a<\/span>[]<\/span> =<\/span> sieve<\/span>(<\/span>100<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>a<\/span>);<\/span>\r\n\r\n\t}<\/span>\r\n\r\n\tpublic<\/span> static<\/span> boolean<\/span>[]<\/span> sieve<\/span>(<\/span>int<\/span> n<\/span>)<\/span> {<\/span>\r\n\t\tboolean<\/span>[]<\/span> result<\/span> =<\/span> new<\/span> boolean<\/span>[<\/span>n<\/span>];<\/span>\r\n\t\tfor<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 2<\/span>;<\/span> i<\/span> <<\/span> n<\/span>;<\/span> i<\/span>++)<\/span>\r\n\t\t\tresult<\/span>[<\/span>i<\/span>]<\/span> =<\/span> true<\/span>;<\/span>\r\n\t\tfor<\/span> (<\/span>int<\/span> number<\/span> =<\/span> 2<\/span>;<\/span> number<\/span> <=<\/span> (<\/span>int<\/span>)<\/span> Math<\/span>.<\/span>sqrt<\/span>(<\/span>n<\/span>);<\/span> number<\/span>++)<\/span> {<\/span>\r\n\t\t\tif<\/span> (<\/span>result<\/span>[<\/span>number<\/span>]<\/span> ==<\/span> true<\/span>)<\/span> {<\/span>\r\n\t\t\t\tfor<\/span> (<\/span>int<\/span> indexInSeries<\/span> =<\/span> number<\/span> *<\/span> number<\/span>;<\/span> indexInSeries<\/span> <<\/span> n<\/span>;<\/span> indexInSeries<\/span> +=<\/span> number<\/span>)<\/span> {<\/span>\r\n\t\t\t\t\tresult<\/span>[<\/span>indexInSeries<\/span>]<\/span> =<\/span> false<\/span>;<\/span>\r\n\t\t\t\t}<\/span>\r\n\t\t\t}<\/span>\r\n\t\t}<\/span>\r\n\t\treturn<\/span> result<\/span>;<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\npackage<\/span> thinkJava<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> chap8_7<\/span> {<\/span>\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\t\tint<\/span>[]<\/span> arr<\/span> =<\/span> {<\/span>1<\/span>,<\/span>2<\/span>,<\/span>3<\/span>,<\/span>4<\/span>,<\/span>5<\/span>,<\/span>6<\/span>,<\/span>7<\/span>,<\/span>8<\/span>,<\/span>9<\/span>,<\/span>10<\/span>};<\/span>\r\n\t\tboolean<\/span> b<\/span> =<\/span> arePrimeFactors<\/span>(<\/span>10<\/span>,<\/span>arr<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>b<\/span>);<\/span>\r\n\t}<\/span>\r\n\t\r\n\tpublic<\/span> static<\/span> boolean<\/span> isPrime<\/span>(<\/span>int<\/span> n<\/span>){<\/span>\r\n\t      if<\/span> (<\/span>n<\/span> <<\/span> 2<\/span>){<\/span>\r\n\t         return<\/span> false<\/span>;<\/span>\r\n\t      }<\/span> \r\n\t      else<\/span> if<\/span> (<\/span>n<\/span> ><\/span> 2<\/span>){<\/span>\r\n\t         if<\/span> (<\/span>n<\/span> %<\/span> 2<\/span> ==<\/span> 0<\/span>){<\/span>\r\n\t            return<\/span> false<\/span>;<\/span>\r\n\t         }<\/span>\r\n\t         for<\/span> (<\/span>int<\/span> i<\/span> =<\/span> 3<\/span>;<\/span>i<\/span><=(<\/span>int<\/span>)<\/span>Math<\/span>.<\/span>sqrt<\/span>(<\/span>n<\/span>);<\/span>i<\/span>+=<\/span>2<\/span>){<\/span>\r\n\t            if<\/span> (<\/span>n<\/span> %<\/span> i<\/span> !=<\/span>0<\/span>){<\/span>\r\n\t               return<\/span> false<\/span>;<\/span>\r\n\t            }<\/span>\r\n\t         }<\/span>\r\n\t      \r\n\t      }<\/span>\r\n\t      return<\/span> true<\/span>;<\/span>\r\n\t   }<\/span>\r\n\t   \r\n\t   public<\/span> static<\/span> boolean<\/span> arePrimeFactors<\/span>(<\/span>int<\/span> n<\/span>,<\/span> int<\/span>[]<\/span> arr<\/span>){<\/span>\r\n\t      int<\/span> result<\/span> =<\/span> 1<\/span>;<\/span>\r\n\t      for<\/span> (<\/span>int<\/span> element:<\/span>arr<\/span>){<\/span>\r\n\t         if<\/span> (<\/span>isPrime<\/span>(<\/span>element<\/span>)){<\/span>\r\n\t            result<\/span> *=<\/span> element<\/span>;<\/span>\r\n\t         }<\/span> \r\n\t         else<\/span> {<\/span>\r\n\t        \tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>result<\/span>);<\/span>\r\n\t            return<\/span> false<\/span>;<\/span>\r\n\t         }<\/span>\r\n\t      }<\/span>\r\n\t      if<\/span> (<\/span>result<\/span> ==<\/span> n<\/span>){<\/span>\r\n\t         return<\/span> true<\/span>;<\/span>\r\n\t      }<\/span> \r\n\t      else<\/span> {<\/span>\r\n\t    \t System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>result<\/span>);<\/span>\r\n\t         return<\/span> false<\/span>;<\/span>\r\n\t      }<\/span>\r\n\t   }<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7b2c8\u7ae0<\/p>\n
\u524d\u63d0\u6761\u4ef6\u662f\u4ee52e\u8fdb\u884c\u953b\u70bc\u3002<\/p>\n
\u8a5e\u5f59<\/p>\n
\u8fed\u4ee3:
\n\u901a\u8fc7\u4f7f\u7528\u4e00\u4e2a\u6216\u591a\u4e2a\u5faa\u73af\u91cd\u590d\u6b65\u9aa4\u7684\u65b9\u6cd5\u6216\u7b97\u6cd5\u3002<\/p>\n
\u9012\u5f52:
\n\u901a\u8fc7\u4f7f\u7528\u4e0d\u540c\u7684\u53c2\u6570\u8c03\u7528\u81ea\u8eab\u4e00\u6b21\u6216\u591a\u6b21\u7684\u65b9\u6cd5\u6216\u7b97\u6cd5\u3002<\/p>\n
\u57fa\u672c\u60c5\u51b5\uff1a
\n\u5bfc\u81f4\u9012\u5f52\u65b9\u6cd5\u4e0d\u518d\u8fdb\u884c\u53e6\u4e00\u4e2a\u9012\u5f52\u8c03\u7528\u7684\u6761\u4ef6\u3002<\/p>\n
\u9636\u4e58\uff1a
\n\u6240\u6709\u5c0f\u4e8e\u6216\u7b49\u4e8e\u7ed9\u5b9a\u6574\u6570\u7684\u6240\u6709\u6574\u6570\u7684\u4e58\u79ef\u3002<\/p>\n
\u4fe1\u4efb\u8dc3\u8fc1\uff1a
\n\u4e00\u79cd\u901a\u8fc7\u5047\u8bbe\u9012\u5f52\u8c03\u7528\u6709\u6548\uff0c\u800c\u4e0d\u662f\u6309\u7167\u6267\u884c\u6d41\u7a0b\u6765\u9605\u8bfb\u9012\u5f52\u7a0b\u5e8f\u7684\u65b9\u6cd5\u3002<\/p>\n
\u4e8c\u8fdb\u5236\uff1a
\n\u4e00\u79cd\u53ea\u4f7f\u7528\u96f6\u548c\u4e00\u6765\u8868\u793a\u6570\u5b57\u7684\u7cfb\u7edf\u3002\u4e5f\u79f0\u4e3a\u201c\u4e8c\u8fdb\u5236\u201d\u3002<\/p>\n
\u7a0b\u5e8f\u6e90\u4ee3\u7801<\/p>\n
\u7701\u7565\uff1a\u7b80\u5316<\/p>\n
\u8fd0\u52a8<\/p>\n
ex8_1<\/span>\r\n\r\npackage<\/span> thinkJava<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ThinkJava8_2<\/span> {<\/span>\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\t\tint<\/span> bottles<\/span> =<\/span> 99<\/span>;<\/span>\r\n\t\tex8_2<\/span>(<\/span>bottles<\/span>);<\/span>\r\n\r\n\t}<\/span>\r\n\r\n\tpublic<\/span> static<\/span> int<\/span> ex8_2<\/span>(<\/span>int<\/span> bottles<\/span>)<\/span> {<\/span>\r\n\t\tif<\/span> (<\/span>bottles<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>\r\n\t\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"No bottles of beer on the wall,\"<\/span>);<\/span>\r\n\t\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"no bottles of beer,\"<\/span>);<\/span>\r\n\t\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"ya\u2019 can\u2019t take one down, ya\u2019 can\u2019t pass it around,\"<\/span>);<\/span>\r\n\t\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u2019cause there are no more bottles of beer on the wall!\"<\/span>);<\/span>\r\n\t\t\treturn<\/span> 0<\/span>;<\/span>\r\n\r\n\t\t}<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>bottles<\/span> +<\/span> \" bottles of beer on the wall\"<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>bottles<\/span> +<\/span> \" bottles of beer,\"<\/span>);<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"ya\u2019 take one down, ya\u2019 pass it around,\"<\/span>);<\/span>\r\n\t\tbottles<\/span> =<\/span> bottles<\/span> -<\/span> 1<\/span>;<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>bottles<\/span> +<\/span> \" bottles of beer on the wall.\"<\/span>);<\/span>\r\n\t\treturn<\/span> ex8_2<\/span>(<\/span>bottles<\/span>);<\/span>\r\n\t}<\/span>\r\n\r\n}<\/span>\r\n\r\n\r\nex8_3<\/span>\r\npackage<\/span> thinkJava<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ThinkJava2_8_3<\/span> {<\/span>\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>prod<\/span>(<\/span>1<\/span>,<\/span> 5<\/span>));<\/span>\r\n\t}<\/span>\r\n\r\n\tpublic<\/span> static<\/span> int<\/span> prod<\/span>(<\/span>int<\/span> m<\/span>,<\/span> int<\/span> n<\/span>)<\/span> {<\/span>\r\n\t\tif<\/span> (<\/span>m<\/span> ==<\/span> n<\/span>)<\/span> {<\/span>\r\n\t\t\treturn<\/span> n<\/span>;<\/span>\r\n\t\t}<\/span> else<\/span> {<\/span>\r\n\t\t\tint<\/span> recurse<\/span> =<\/span> prod<\/span>(<\/span>m<\/span>,<\/span> n<\/span> -<\/span> 1<\/span>);<\/span>\r\n\t\t\tint<\/span> result<\/span> =<\/span> n<\/span> *<\/span> recurse<\/span>;<\/span>\r\n\t\t\treturn<\/span> result<\/span>;<\/span>\r\n\t\t}<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\npackage<\/span> thinkJava<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> ThinkJava2_8_3<\/span> {<\/span>\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>prod<\/span>(<\/span>1<\/span>,<\/span> 4<\/span>));<\/span>\r\n\t}<\/span>\r\n\r\n\tpublic<\/span> static<\/span> int<\/span> prod<\/span>(<\/span>int<\/span> m<\/span>,<\/span> int<\/span> n<\/span>)<\/span> {<\/span>\r\n\t\treturn<\/span> (<\/span>m<\/span> ==<\/span> n<\/span> ?<\/span> n<\/span> :<\/span> n<\/span> *<\/span> prod<\/span>(<\/span>m<\/span>,<\/span> n<\/span> -<\/span> 1<\/span>));<\/span>\r\n\t}<\/span>\r\n}<\/span>\r\n\r\n\u968e\u4e57\u3092\u3057\u3066\u3044\u307e\u3059<\/span>\u3002<\/span>\r\n\r\nex8_5<\/span>\r\npublic<\/span> class<\/span> ThinkJava2_8_5<\/span> {<\/span>\r\n\r\n\tpublic<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\t\tSystem<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>power<\/span>(<\/span>2.0<\/span>,<\/span> 1<\/span>));<\/span>\r\n\r\n\t}<\/span>\r\n\t\r\n\tstatic<\/span> int<\/span> power<\/span> (<\/span>double<\/span> num<\/span>,<\/span> int<\/span> pow<\/span>){<\/span>\r\n        if<\/span> (<\/span>pow<\/span> ==<\/span> 0<\/span>)<\/span>\r\n            return<\/span> 1<\/span>;<\/span>\r\n        else<\/span>\r\n            return<\/span> (<\/span>int<\/span>)<\/span> (<\/span>num<\/span> *<\/span> power<\/span>(<\/span>num<\/span>,<\/span> pow<\/span> -<\/span> 1<\/span>));<\/span>\r\n    }<\/span>\r\n\r\n}<\/span>\r\n\r\n\r\n\r\n\r\nex8_7<\/span>\r\npublic<\/span> class<\/span> Recurse<\/span>{<\/span>\r\n   public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n      System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>isPalindrome<\/span>(<\/span>\"otto\"<\/span>));<\/span>\r\n   }<\/span>\r\n\r\n   public<\/span> static<\/span> void<\/span> printString<\/span>(<\/span>String<\/span> str<\/span>){<\/span>\r\n      if<\/span> (<\/span>length<\/span>(<\/span>str<\/span>)<\/span> !=<\/span> 0<\/span>){<\/span>\r\n         System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>first<\/span>(<\/span>str<\/span>));<\/span>\r\n         printString<\/span>(<\/span>rest<\/span>(<\/span>str<\/span>));<\/span>\r\n      }<\/span>\r\n   }<\/span>\r\n\r\n   public<\/span> static<\/span> void<\/span> printBackward<\/span>(<\/span>String<\/span> str<\/span>){<\/span>\r\n      if<\/span> (<\/span>length<\/span>(<\/span>str<\/span>)<\/span> !=<\/span> 0<\/span>){<\/span>\r\n         printBackward<\/span>(<\/span>rest<\/span>(<\/span>str<\/span>));<\/span>\r\n         System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>first<\/span>(<\/span>str<\/span>));<\/span>\r\n      }<\/span>\r\n   }<\/span>\r\n\r\n   public<\/span> static<\/span> String<\/span> reverseString<\/span>(<\/span>String<\/span> str<\/span>){<\/span>\r\n      if<\/span> (<\/span>length<\/span>(<\/span>str<\/span>)<\/span> !=<\/span> 0<\/span>){<\/span>\r\n         return<\/span> reverseString<\/span>(<\/span>rest<\/span>(<\/span>str<\/span>))<\/span> +<\/span> first<\/span>(<\/span>str<\/span>);<\/span>\r\n      }<\/span>\r\n      return<\/span> \"\"<\/span>;<\/span>\r\n   }<\/span>\r\n\r\n   public<\/span> static<\/span> boolean<\/span> isPalindrome<\/span>(<\/span>String<\/span> str<\/span>){<\/span>\r\n      int<\/span> length<\/span> =<\/span> length<\/span>(<\/span>str<\/span>);<\/span>\r\n      if<\/span> (<\/span>length<\/span> ==<\/span> 1<\/span>){<\/span>\r\n         return<\/span> true<\/span>;<\/span>\r\n      }<\/span> \r\n      else<\/span> if<\/span> (<\/span>length<\/span> ==<\/span> 2<\/span>){<\/span>\r\n         return<\/span> first<\/span>(<\/span>str<\/span>)<\/span> ==<\/span> first<\/span>(<\/span>rest<\/span>(<\/span>str<\/span>));<\/span>\r\n      }<\/span> \r\n      else<\/span> {<\/span>\r\n         return<\/span> first<\/span>(<\/span>str<\/span>)<\/span> ==<\/span> first<\/span>(<\/span>reverseString<\/span>(<\/span>rest<\/span>(<\/span>str<\/span>)))<\/span> &&<\/span> isPalindrome<\/span>(<\/span>middle<\/span>(<\/span>str<\/span>));<\/span>\r\n      }<\/span>\r\n   }<\/span>\r\n   \/\/ MARK: Supporting<\/span>\r\n\r\n   \/**\r\n    * Returns the first character of the given String.\r\n    *\/<\/span>\r\n   public<\/span> static<\/span> char<\/span> first<\/span>(<\/span>String<\/span> s<\/span>){<\/span>\r\n      return<\/span> s<\/span>.<\/span>charAt<\/span>(<\/span>0<\/span>);<\/span>\r\n   }<\/span>\r\n\r\n   \/**\r\n    * Returns all but the first letter of the given String.\r\n    *\/<\/span>\r\n   public<\/span> static<\/span> String<\/span> rest<\/span>(<\/span>String<\/span> s<\/span>)<\/span> {<\/span>\r\n      return<\/span> s<\/span>.<\/span>substring<\/span>(<\/span>1<\/span>);<\/span>\r\n   }<\/span>\r\n\r\n   \/**\r\n    * Returns all but the first and last letter of the String.\r\n    *\/<\/span>\r\n   public<\/span> static<\/span> String<\/span> middle<\/span>(<\/span>String<\/span> s<\/span>)<\/span> {<\/span>\r\n      return<\/span> s<\/span>.<\/span>substring<\/span>(<\/span>1<\/span>,<\/span> s<\/span>.<\/span>length<\/span>()<\/span> -<\/span> 1<\/span>);<\/span>\r\n   }<\/span>\r\n\r\n   \/**\r\n    * Returns the length of the given String.\r\n    *\/<\/span>\r\n   public<\/span> static<\/span> int<\/span> length<\/span>(<\/span>String<\/span> s<\/span>)<\/span> {<\/span>\r\n      return<\/span> s<\/span>.<\/span>length<\/span>();<\/span>\r\n   }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u5916\u5356 \u80cc\u666f\u548c\u539f\u56e0 \u4e3a\u4e86\u6210\u4e3a\u4e00\u540d\u4f18\u79c0\u7684\u7a0b\u5e8f\u5458\uff0c\u6211\u5c06\u5b66\u4e60\u300aThink Java\u300b\u3002 #\u8d44\u6e90 \u300aThink Java […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[227],"class_list":["post-31120","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-227"],"yoast_head":"\n\u601d\u8003Java - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u5173\u4e8e\u601d\u8003Java\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/\u601d\u8003java\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u601d\u8003Java\" \/>\n<meta property=\"og:description\" content=\"\u5173\u4e8e\u601d\u8003Java\u7684\u6280\u672f\u6587\u7ae0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u601d\u8003java\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-01-26T00:13:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-12T14:25:55+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0abc37434c4406be4b6c\/1-1.png\" \/>\n<meta name=\"author\" content=\"\u65b0, \u97f5\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u65b0, \u97f5\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/\",\"name\":\"\u601d\u8003Java - Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2023-01-26T00:13:26+00:00\",\"dateModified\":\"2025-08-12T14:25:55+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/4ba4019495123db3038fd0809e6959c9\"},\"description\":\"\u5173\u4e8e\u601d\u8003Java\u7684\u6280\u672f\u6587\u7ae0\",\"breadcrumb\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/#breadcrumb\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"https:\/\/www.silicloud.com\/zh\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u601d\u8003Java\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - Silicon Cloud\",\"description\":\"\",\"inLanguage\":\"zh-Hans\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/4ba4019495123db3038fd0809e6959c9\",\"name\":\"\u65b0, \u97f5\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/d484b6c6e4ae82e8a9efea989e1d2af46d9b6ef128101e63b18f559fca0ae627?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/d484b6c6e4ae82e8a9efea989e1d2af46d9b6ef128101e63b18f559fca0ae627?s=96&d=mm&r=g\",\"caption\":\"\u65b0, \u97f5\"},\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/author\/yunxin\/\"},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-Hans\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/#local-main-organization-logo\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Blog - Silicon Cloud\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"\u601d\u8003Java - Blog - Silicon Cloud","description":"\u5173\u4e8e\u601d\u8003Java\u7684\u6280\u672f\u6587\u7ae0","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/\u601d\u8003java\/","og_locale":"zh_CN","og_type":"article","og_title":"\u601d\u8003Java","og_description":"\u5173\u4e8e\u601d\u8003Java\u7684\u6280\u672f\u6587\u7ae0","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/\u601d\u8003java\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2023-01-26T00:13:26+00:00","article_modified_time":"2025-08-12T14:25:55+00:00","og_image":[{"url":"https:\/\/cdn.silicloud.com\/blog-img\/blog\/img\/657d0abc37434c4406be4b6c\/1-1.png"}],"author":"\u65b0, \u97f5","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u65b0, \u97f5","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"2 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/","name":"\u601d\u8003Java - Blog - Silicon Cloud","isPartOf":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website"},"datePublished":"2023-01-26T00:13:26+00:00","dateModified":"2025-08-12T14:25:55+00:00","author":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/4ba4019495123db3038fd0809e6959c9"},"description":"\u5173\u4e8e\u601d\u8003Java\u7684\u6280\u672f\u6587\u7ae0","breadcrumb":{"@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/#breadcrumb"},"inLanguage":"zh-Hans","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u9996\u9875","item":"https:\/\/www.silicloud.com\/zh\/blog\/"},{"@type":"ListItem","position":2,"name":"\u601d\u8003Java"}]},{"@type":"WebSite","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#website","url":"https:\/\/www.silicloud.com\/zh\/blog\/","name":"Blog - Silicon Cloud","description":"","inLanguage":"zh-Hans"},{"@type":"Person","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/4ba4019495123db3038fd0809e6959c9","name":"\u65b0, \u97f5","image":{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/d484b6c6e4ae82e8a9efea989e1d2af46d9b6ef128101e63b18f559fca0ae627?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d484b6c6e4ae82e8a9efea989e1d2af46d9b6ef128101e63b18f559fca0ae627?s=96&d=mm&r=g","caption":"\u65b0, \u97f5"},"url":"https:\/\/www.silicloud.com\/zh\/blog\/author\/yunxin\/"},{"@type":"ImageObject","inLanguage":"zh-Hans","@id":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%80%9d%e8%80%83java\/#local-main-organization-logo","url":"","contentUrl":"","caption":"Blog - Silicon Cloud"}]}},"_links":{"self":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/31120","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/comments?post=31120"}],"version-history":[{"count":2,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/31120\/revisions"}],"predecessor-version":[{"id":111872,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/posts\/31120\/revisions\/111872"}],"wp:attachment":[{"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/media?parent=31120"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/categories?post=31120"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.silicloud.com\/zh\/blog\/wp-json\/wp\/v2\/tags?post=31120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/a><\/p>\n
\u547d\u540d\u89c4\u5219\u7684\u4e2d\u6587\u7ffb\u8bd1\u4e3a\uff1anaming rules.<\/p>\n
\u4f7f\u7528\u4f4e\u9a7c\u5cf0\u5f0f\u547d\u540d\u6cd5\u5728\u65b9\u6cd5\u540d\u4e2d
\n\u4f7f\u7528\u5927\u9a7c\u5cf0\u5f0f\u547d\u540d\u6cd5\u5728\u7c7b\u540d\u4e2d<\/a><\/p>\n