{"id":31418,"date":"2023-11-01T19:36:38","date_gmt":"2023-10-26T18:13:02","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java-%e9%93%b6%e8%89%b2%e3%80%91java-%e9%93%b6%e8%89%b2-se11-%e8%80%83%e8%af%95%e5%87%86%e5%a4%87%e5%a4%87%e5%bf%98%e5%bd%95\/"},"modified":"2025-08-12T23:57:04","modified_gmt":"2025-08-12T15:57:04","slug":"%e3%80%90java-%e9%93%b6%e8%89%b2%e3%80%91java-%e9%93%b6%e8%89%b2-se11-%e8%80%83%e8%af%95%e5%87%86%e5%a4%87%e5%a4%87%e5%bf%98%e5%bd%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e3%80%90java-%e9%93%b6%e8%89%b2%e3%80%91java-%e9%93%b6%e8%89%b2-se11-%e8%80%83%e8%af%95%e5%87%86%e5%a4%87%e5%a4%87%e5%bf%98%e5%bd%95\/","title":{"rendered":"\u3010Java \u94f6\u8272\u3011Java \u94f6\u8272 SE11 \u8003\u8bd5\u51c6\u5907\u5907\u5fd8\u5f55"},"content":{"rendered":"

\u8fd9\u4e2a\u5907\u5fd8\u5f55\u7684\u4f7f\u7528\u65b9\u5f0f\u76ee\u6807\uff1a\u9884\u8ba1\u53c2\u52a0Java Silver SE11\u8003\u8bd5\u7684\u4eba\u58eb
\n\u7531\u4e8e\u901a\u8fc7\u4e86Java Silver\u8003\u8bd5\uff0c\u6211\u5c06\u516c\u5f00\u6574\u7406\u8fc7\u7684\u7b14\u8bb0\u3002
\n\u7b14\u8bb0\u7684\u7ed3\u6784\u4e0e\u201c\u9ed1\u4e66\u201d\u4e00\u81f4\u3002\u6211\u8ba4\u4e3a\uff0c\u53ea\u8981\u638c\u63e1\u4e86\u8fd9\u4e9b\u7b14\u8bb0\u4e2d\u6240\u5199\u7684\u5185\u5bb9\uff0c\u5c31\u80fd\u591f\u901a\u8fc7\u8003\u8bd5\u3002
\n\u7b14\u8bb0\u4e2d\u603b\u7ed3\u4e86\u8003\u8bd5\u9700\u8981\u8bb0\u4f4f\u7684\u90e8\u5206\u4ee5\u53ca\u6613\u9519\u7684Java\u89c4\u5219\uff0c\u8bf7\u5145\u5206\u5229\u7528\u3002<\/p>\n

\u521b\u5efa\u4e00\u4e2a\u7b80\u5355\u7684Java\u7a0b\u5e8f–\u7b2c1\u7ae0<\/p>\n

\u25c6java\u547d\u4ee4\u30fb\u5199\u4f5c\u65b9\u5f0f\uff1ajava \u5b8c\u5168\u9650\u5b9a\u7c7b\u540d [\u53c2\u6570, \u53c2\u6570, …]
\n\u203b\u5b8c\u5168\u9650\u5b9a\u540d\u6307\u7684\u662f\u50cf”java.lang.String”\u8fd9\u6837\u7684\u6b63\u5f0f\u540d\u79f0\u3002”String”\u7c7b\u88ab\u79f0\u4e3a\u7b80\u5355\u540d\u3002<\/p>\n

\u5c06\u53c2\u6570\u4ee5\u7a7a\u683c\u5206\u9694\u5217\u4e3e\u3002<\/p>\n

\u300c\u00a5\u300d\u4e0e\u4e00\u4e2a\u53c2\u6570\u4e00\u8d77\u8f93\u51fa\u65f6\uff0c\u7b49\u4ef7\u4e8e\u300c”\u300d\u3002<\/p>\n

1. \u5b9e\u884c\u547d\u4ee4\uff1ajava \u6587\u4ef6\u540d\uff08\u4e0d\u9700\u8981\u6269\u5c55\u540d\u5982 .java\uff09\/java \u6587\u4ef6\u540d.java\uff08\u6dfb\u52a0\u6269\u5c55\u540d\u53ef\u514d\u53bb\u7f16\u8bd1\u8fc7\u7a0b\uff09
\n2. \u7f16\u8bd1\u547d\u4ee4\uff1ajavac \u6587\u4ef6\u540d.java\uff08\u9700\u8981\u6269\u5c55\u540d\uff09
\n3. \u6a21\u5757\u547d\u4ee4\uff1ajmod<\/p>\n

\u30fbJava\u547d\u4ee4\u6267\u884c\u65f6\u7684\u64cd\u4f5c\uff1a
\n\u2460\u542f\u52a8JVM
\n\u2461\u4ece\u7c7b\u8def\u5f84\u4e2d\u67e5\u627e\u5e76\u52a0\u8f7d\u6307\u5b9a\u7684\u7c7b
\n\u2462\u521b\u5efaString\u7c7b\u578b\u7684\u5bf9\u8c61\uff0c\u5e76\u5b58\u50a8\u542f\u52a8\u53c2\u6570\uff08\u53c2\u6570\uff09
\n\u2463\u5c06\u5b58\u6709\u542f\u52a8\u53c2\u6570\uff08\u53c2\u6570\uff09\u7684String\u6570\u7ec4\u7c7b\u578b\u7684\u5bf9\u8c61\u5f15\u7528\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u5e76\u6267\u884c\u65b9\u6cd5<\/p>\n

\u25c6\u6570\u503c\u5b57\u9762\u5e38\u6570\u6574\u6570\u5b57\u9762\u503c\u7684\u7c7b\u578b\uff1a\u6574\u578b\u6570\u503c\uff08int\u578b\uff09\u3001\u5b57\u7b26\uff08char\u578b\uff09\u3001\u6d6e\u70b9\u6570\uff08double\u578b\uff09\u3001\u5e03\u5c14\u503c\uff08boolean\u578b\uff09\u7684\u56db\u79cd\u3002<\/p>\n

\u5f53\u6211\u4eec\u5e0c\u671b\u5c06\u5b57\u9762\u91cf\u660e\u786e\u8868\u793a\u4e3a\u5176\u4ed6\u6570\u636e\u7c7b\u578b\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u503c\u7684\u540e\u9762\u6dfb\u52a0\u63a5\u5c3e\u8f9e\u4ee5\u8868\u793along\u578b\u4e3a\u300cL\u300d\u300cl\u300d\uff0cfloat\u578b\u4e3a\u300cF\u300d\u300cf\u300d\u3002<\/p>\n

\u5404\u8fdb\u5236\u7684\u524d\u7f00
\n\u2460 \u4e8c\u8fdb\u5236\uff1a\u52a0\u4e0a\u524d\u7f00\u300c0b\u300d\u3002\u4f8b\u5982\u5341\u8fdb\u5236\u7684\u300c63\u300d\u8868\u793a\u4e3a\u300c0b0111111\u300d\u3002
\n\u2461 \u516b\u8fdb\u5236\uff1a\u52a0\u4e0a\u524d\u7f00\u300c0\u300d\u3002\u4f8b\u5982\u5341\u8fdb\u5236\u7684\u300c63\u300d\u8868\u793a\u4e3a\u300c077\u300d\u3002
\n\u2462 \u5341\u516d\u8fdb\u5236\uff1a\u52a0\u4e0a\u524d\u7f00\u300c0x\u300d\u3002\u4f8b\u5982\u5341\u8fdb\u5236\u7684\u300c63\u300d\u8868\u793a\u4e3a\u300c0x3F\u300d\u3002<\/p>\n

\u2022\u300c_\u300d\u4e0b\u5212\u7ebf\uff1a\u7528\u4e8e\u589e\u5f3a\u957f\u6570\u5b57\u5b57\u9762\u7684\u53ef\u8bfb\u6027\u3002\u4e0b\u5212\u7ebf\u4e0d\u80fd\u51fa\u73b0\u5728\u5b57\u9762\u7684\u5f00\u5934\u548c\u7ed3\u5c3e\uff0c\u4ee5\u53ca\u7b26\u53f7\u4e4b\u524d\u548c\u4e4b\u540e\uff08\u7b26\u53f7\u793a\u4f8b\uff1a\u300c.\u300d\u300cL\u300d\u300cF\u300d\u300c0b\u300d\u300c0x\u300d\uff09\u3002\u9664\u6b64\u4e4b\u5916\uff0c\u4e0b\u5212\u7ebf\u53ef\u4ee5\u4ee5\u81ea\u7531\u7684\u65b9\u5f0f\u51fa\u73b0\u5728\u5176\u4ed6\u4f4d\u7f6e\u548c\u6b21\u6570\u3002<\/p>\n

\u25c6\u8bc6\u522b\u7b26\u30fb\u547d\u540d\u89c4\u5219\uff1a
\n\u2460 \u4e0d\u80fd\u5c06\u4fdd\u7559\u5b57\uff08\u5982abstract, if, int\u7b49\uff09\u4f5c\u4e3a\u6807\u8bc6\u7b26\u4f7f\u7528
\n\u2461 \u7b26\u53f7\u53ea\u80fd\u4f7f\u7528\u4e0b\u5212\u7ebf”_”\u548c\u8d27\u5e01\u7b26\u53f7\uff04
\n\u2462 \u4e0d\u80fd\u4ee5\u6570\u5b57\u5f00\u5934<\/p>\n

\u7b2c\u4e8c\u7ae0: Java\u7684\u57fa\u672c\u6570\u636e\u7c7b\u578b\u548c\u5b57\u7b26\u4e32\u64cd\u4f5c<\/p>\n

\u25c6\u7c7b\u578b\u8f6c\u6362\u30fb\u5728\u7c7b\u578b\u8f6c\u6362\u65b9\u9762\u6709\u4e24\u79cd\u65b9\u6cd5\u3002
\n1. \u9690\u5f0f\u7c7b\u578b\u8f6c\u6362\uff1a\u4e0d\u9700\u8981\u4f7f\u7528\u8f6c\u6362\u64cd\u4f5c\u7b26\u3002\u5c06\u5c0f\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u4e3a\u5927\u6570\u636e\u7c7b\u578b\u3002
\n2. \u663e\u5f0f\u7c7b\u578b\u8f6c\u6362\uff1a\u9700\u8981\u4f7f\u7528\u8f6c\u6362\u64cd\u4f5c\u7b26\u3002\u5c06\u5927\u6570\u636e\u7c7b\u578b\u8f6c\u6362\u4e3a\u5c0f\u6570\u636e\u7c7b\u578b\u3002<\/p>\n

\u30fb\u6309\u7167\u5927\u5c0f\u987a\u5e8f\u6392\u5217
\n(\u5c0f) \u5b57\u8282(byte) \u2192 \u77ed\u6574\u578b(short) \u2192 \u6574\u578b(int) \u2192 \u957f\u6574\u578b(long) \u2192 \u5355\u7cbe\u5ea6\u6d6e\u70b9\u578b(float) \u2192 \u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b(double) (\u5927)
\n\u5b57\u7b26\u578b(char) \u4f1a\u81ea\u52a8\u8f6c\u6362\u4e3a\u6574\u578b\u3001\u957f\u6574\u578b\u3001\u5355\u7cbe\u5ea6\u6d6e\u70b9\u578b\u548c\u53cc\u7cbe\u5ea6\u6d6e\u70b9\u578b\u3002<\/p>\n

\u53d8\u91cf\u53ea\u80fd\u5728\u672c\u5730\u53d8\u91cf\u4e2d\u4f7f\u7528\u3002
\n\u4e0d\u80fd\u7528\u4e8e\u5b57\u6bb5\u58f0\u660e\u3001\u53c2\u6570\u7c7b\u578b\u58f0\u660e\u3001lambda\u8868\u8fbe\u5f0f\u3001\u6570\u7ec4\u521d\u59cb\u5316\u8868\u8fbe\u5f0f\u3001null\u3002<\/p>\n

\u25c6String\u7c7b\u5728\u4e2d\u56fd\u7684\u6bcd\u8bed\u4e2d\u91cd\u65b0\u89e3\u91ca:
\n– \u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\u5bf9\u8c61\u3002\u5982\u679c\u8981\u66f4\u6539\u5b57\u7b26\u4e32\uff0c\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u65b0\u5b9e\u4f8b\u3002<\/p>\n

\u3010String\u7c7b\u7684\u4e3b\u8981\u65b9\u6cd5\u3011
\n\u25a0indexOf\u65b9\u6cd5\uff1a\u5f53\u641c\u7d22\u4e0d\u5339\u914d\u65f6\uff0c\u8fd4\u56de-1\u3002\u5f53\u53c2\u6570\u5339\u914d\u65f6\uff0c\u8fd4\u56de\u5176\u8d77\u59cb\u4f4d\u7f6e\u3002
\n\u25a0replace\u65b9\u6cd5\uff1a\u4ece\u5934\u5230\u5c3e\u9010\u4e2a\u66ff\u6362\u6240\u6709\u5339\u914d\u9879\u3002
\n\u25a0replaceAll\u65b9\u6cd5\uff1a\u521b\u5efa\u4e00\u4e2a\u5e26\u6709\u66ff\u6362\u7ed3\u679c\u7684\u65b0String\u5b9e\u4f8b\uff0c\u5e76\u8fd4\u56de\u5bf9\u8be5\u5b9e\u4f8b\u7684\u5f15\u7528\u3002
\n\u25a0length\u65b9\u6cd5\uff1a\u5b57\u7b26\u6570\uff08\u4e0d\u533a\u5206\u534a\u89d2\u548c\u5168\u89d2\uff09\u3002
\n\u25a0concat\u65b9\u6cd5\uff1a\u8fde\u63a5\u5b57\u7b26\u3002<\/p>\n

\u7b2c\u4e09\u7ae0\uff1a\u8fd0\u7b97\u7b26\u548c\u5224\u65ad\u7ed3\u6784<\/p>\n

\u25c6equals\u65b9\u6cd5\u5728\u5c5e\u4e8e Object \u7c7b\u7684\u65b9\u6cd5\u4e2d\uff0c\u901a\u8fc7\u8986\u76d6\u91cd\u5199\u6765\u786e\u5b9a\u4e24\u4e2a\u5bf9\u8c61\u7684\u7b49\u503c\u6027\u3002\u5982\u679c\u4e0d\u8fdb\u884c\u8986\u76d6\u91cd\u5199\uff0c\u5219\u5c06\u786e\u8ba4\u5b83\u4eec\u7684\u540c\u4e00\u6027\u800c\u4e0d\u662f\u7b49\u503c\u6027\u3002<\/p>\n
public<\/span> boolean<\/span> equals<\/span>(<\/span>Object<\/span> obj<\/span>){<\/span>  \r\n         return<\/span>(<\/span>this<\/span> ==<\/span> obj<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u30fb\u540c\u5024\u6027\uff08\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u6642\uff09\uff1a\u6307\u7684\u662f\u5177\u6709\u4e0d\u540c\u53c2\u8003\u7684\u5b9e\u4f8b\uff0c\u4f46\u5177\u6709\u76f8\u540c\u503c\u7684\u6027\u8d28\u3002
\n\u30fb\u540c\u4e00\u6027\uff08\u30aa\u30fc\u30d0\u30fc\u30ed\u30fc\u30c9\u65f6\uff09\uff1a\u7528\u4e8e\u786e\u8ba4\u5177\u6709\u4e0d\u540c\u53c2\u8003\u7684\u60c5\u51b5\u3002\u5982\u679c\u4e0d\u540c\uff0c\u5219\u8fd4\u56defalse\u3002<\/p>\n
\u5f53\u53c2\u6570\u4e3anull\u65f6\uff0c\u59cb\u7ec8\u8fd4\u56defalse\u3002<\/p>\n
\u25c6\u5b9e\u4e60\u751f\u65b9\u6cd5\u30fb\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u5b58\u5728\u4e8e\u5e38\u91cf\u6c60\u4e2d\uff0c\u5982\u679c\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u8fd4\u56de\u8be5\u5b57\u7b26\u4e32\uff08\u8fdb\u884c\u91cd\u7528\uff09\u3002\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u5219\u5c06\u8be5\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u5e38\u91cf\u6c60\u4e2d\u3002<\/p>\n
\u25c6\u5982\u679c\u5982\u679c\u7701\u7565{}\uff0c\u5219\u53ea\u6709\u7b2c\u4e00\u53e5\u8bdd\u4f1a\u88ab\u89c6\u4e3aif\u8bed\u53e5\u7684\u5904\u7406\u3002<\/p>\n
if<\/span>(<\/span>a<\/span><<\/span>10<\/span>)<\/span>\r\n\/\/{<\/span>\r\nsystem<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>\"true\"<\/span>)<\/span> \/\/\u2190\u3053\u306e\u6587\u3060\u3051if\u6587\u306e\u51e6\u7406\u3068\u307f\u306a\u3055\u308c\u308b<\/span>\r\n\/\/}<\/span>\r\nsystem<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>\"false\"<\/span>)<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u6ee1\u8db3\u4e86\u6761\u4ef6\u5e76\u6267\u884c\u4e86\u5904\u7406\u5185\u5bb9\uff0c\u90a3\u4e48\u4e4b\u540e\u7684\u6761\u4ef6\u5c06\u4e0d\u4f1a\u88ab\u6267\u884c\u3002<\/p>\n
\u25c6\u5f00\u5173\u8bed\u53e5\u30fbcase\u503c\u7684\u89c4\u5219
\n1. \u4e0eswitch\u8bed\u53e5\u7684\u53c2\u6570\u5177\u6709\u76f8\u540c\u7c7b\u578b\/\u517c\u5bb9\u7c7b\u578b\u3002
\n2. \u5fc5\u987b\u662f\u5e38\u91cf\uff08final\u58f0\u660e\u7684\u53d8\u91cf\uff09\u6216\u5b57\u9762\u503c\u3002
\n3. \u4e0d\u80fd\u662fnull\u3002<\/p>\n
final<\/span> int<\/span> NUM<\/span> =<\/span> 0<\/span>;<\/span>\r\nint<\/span> num<\/span> =<\/span> 0<\/span>;<\/span>\r\n\r\nswitch<\/span>(<\/span>num<\/span>){<\/span>\r\n    case<\/span> \"10\"<\/span>:<\/span>    System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>\"A\"<\/span>);<\/span>  \/\/\u5f15\u6570num\u306fint\u578b\u3067\u3042\u308b\u304c\u3001<\/span>\r\n                  break<\/span>;<\/span>                  \/\/\"10\"\u306fString\u578b\u306a\u306e\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n\r\n    case<\/span> num:<\/span>     System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>\"B\"<\/span>);<\/span>  \/\/num\u306ffinal\u5ba3\u8a00\u3055\u308c\u3066\u306a\u3044\u306e\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n                  break<\/span>;<\/span>\r\n           }<\/span>\r\n<\/code><\/pre>\n
\u5f53\u9ed8\u8ba4\u503c\u65f6\uff0c\u5e94\u7528\u4e8e\u4efb\u4f55\u5176\u4ed6\u60c5\u51b5\u3002<\/p>\n
\u5982\u679c\u5c06null\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u5c06\u629b\u51faNullPointerException\u3002<\/p>\n
Chapter 4: Control Structures
\n\u7b2c\u56db\u7ae0\uff1a\u63a7\u5236\u7ed3\u6784<\/p>\n
\u25c6\u5f53\u6587
\n\u7701\u7565{}\u65f6\u7684\u6ce8\u610f\u4e8b\u9879\uff1ado{\u5904\u7406}\u7684\u5904\u7406\u53ea\u80fd\u5199\u4e00\u53e5\u8bdd\u3002\u5199\u4e24\u53e5\u6216\u66f4\u591a\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n
int<\/span> cnt<\/span> =<\/span> 0<\/span>;<\/span>\r\ndo<\/span>\r\n   system<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"A\"<\/span>);<\/span>\r\n   system<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"B\"<\/span>);<\/span>  \/\/\u4e2d\u304b\u3063\u3053\u3092\u7701\u7565\u3057\uff12\u3064\u306e\u5206\u3092\u8a18\u8ff0\u3057\u3066\u3044\u308b\u306e\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\nwhile<\/span> (<\/span>cnt<\/span>++<<\/span>5<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u904d\u5386\u5faa\u73af\u8bed\u53e5\u30fb\u53ef\u4ee5\u5bf9\u521d\u59cb\u5316\u5b50\u548c\u66f4\u65b0\u6587\u8fdb\u884c\u591a\u6b21\u63cf\u8ff0\u3002
\nh\u00e9<\/p>\n
\u30fb\u521d\u671f\u5316\u5b50\u5fc5\u987b\u662f\u76f8\u540c\u7684\u7c7b\u578b\u3002\u5728\u7b2c\u4e8c\u4e2a\u521d\u59cb\u5316\u5b50\u4e2d\uff0c\u53ef\u4ee5\u4e0d\u5199\u7c7b\u578b\u540d\u79f0\u3002<\/p>\n
\u5728\u4e2d\u6587\u4e2d\u8fdb\u884c\u6539\u8ff0\uff1a\u53ea\u80fd\u5199\u4e00\u4e2a\u6761\u4ef6\u5f0f\uff0c\u5982\u679c\u5199\u591a\u4e2a\u4f1a\u51fa\u73b0\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n
for<\/span>(<\/span>int<\/span> i<\/span>=<\/span>0<\/span>,<\/span> j<\/span>=<\/span>2<\/span>;<\/span> i<\/span><<\/span>10<\/span>;<\/span> i<\/span>++,<\/span> j<\/span>++){<\/span>\r\n           \/\/\u51e6\u7406<\/span>\r\n  }<\/span>\r\n\r\n\u25c6<\/span>\u6761\u4ef6\u5f0f\u3092\u8907\u6570\u8a18\u8ff0\u3057\u305f\u3044\u3068\u304d\u306f<\/span>[[<\/span>\u8ad6\u7406\u6f14\u7b97\u5b50<\/span>]]<\/span>\u3092\u4f7f\u3046<\/span>\r\nfor<\/span>(<\/span>int<\/span> i<\/span>=<\/span>0<\/span>,<\/span> j<\/span>=<\/span>2<\/span>;<\/span> i<\/span><<\/span>10<\/span> &&<\/span> j<\/span><<\/span>10<\/span>;<\/span> i<\/span>++,<\/span> j<\/span>++){<\/span>\r\n          \/\/\u51e6\u7406<\/span>\r\n  }<\/span>\r\n<\/code><\/pre>\n
\u30fb\u5f53\u5faa\u73af\u5904\u7406\u5b8c\u6210\u65f6\uff0c\u5c06\u6267\u884c\u66f4\u65b0\u6587\u3002<\/p>\n
\u5728for\u5faa\u73af\u5185\u58f0\u660e\u7684\u53d8\u91cf\u53ea\u5728\u8be5\u5faa\u73af\u5185\u90e8\u6709\u6548\u3002<\/p>\n
\u5982\u679c\u5728”continue”\u4e4b\u540e\u5199\u4e0a\u4efb\u4f55\u5904\u7406\u4ee3\u7801\uff0c\u5c06\u4f1a\u51fa\u73b0\u7f16\u8bd1\u9519\u8bef\uff0c\u8868\u793a\u5230\u8fbe\u4e0d\u53ef\u80fd\u7684\u4ee3\u7801\u3002<\/p>\n
\u64cd\u4f5c\u6570\u7ec4\u7684\u7b2c\u4e94\u7ae0<\/p>\n
\u25c6\u6392\u5217<\/p>\n
\/\/\u30c7\u30fc\u30bf\u578b[] \u914d\u5217\u5909\u6570\u540d<\/span>\r\nint<\/span>[]<\/span> num<\/span>;<\/span>\r\n\r\n\/\/\u307e\u305f\u306f<\/span>\r\n\/\/\u30c7\u30fc\u30bf\u578b \u914d\u5217\u5909\u6570\u540d[]<\/span>\r\nint<\/span> num<\/span>[];<\/span>\r\n<\/code><\/pre>\n
\/\/\u914d\u5217\u5909\u6570\u540d = new \u30c7\u30fc\u30bf\u578b[\u8981\u7d20\u6570]<\/span>\r\nint<\/span>[]<\/span> num<\/span> =<\/span> new<\/span> int<\/span>[<\/span>5<\/span>];<\/span>\r\n\/\/\u307e\u305f\u306f<\/span>\r\nint<\/span>[]<\/span> num<\/span>;<\/span>\r\nnum<\/span> =<\/span> new<\/span> int<\/span>[<\/span>5<\/span>];<\/span>\r\n<\/code><\/pre>\n
\/\/\u30c7\u30fc\u30bf\u578b \u914d\u5217\u5909\u6570\u540d = {\u914d\u5217\u306b\u5165\u308c\u308b\u5024}<\/span>\r\nint<\/span>[]<\/span> num<\/span> =<\/span> {<\/span> 1<\/span>,<\/span> 2<\/span>,<\/span> 3<\/span>,<\/span> 4<\/span>,<\/span> 5<\/span>};<\/span>\r\n<\/code><\/pre>\n
\u751f\u6210\u6570\u7ec4\u5b9e\u4f8b\u65f6\uff0c\u5373\u4f7f\u6ca1\u6709\u8f93\u5165\u503c\uff0c\u4e5f\u4f1a\u6839\u636e\u7c7b\u578b\u81ea\u52a8\u4ee5\u9ed8\u8ba4\u503c\u8fdb\u884c\u521d\u59cb\u5316\u3002\uff08int\u7c7b\u578b\u21920 Integer\u7c7b\u578b\u2192null double\u7c7b\u578b\u21920.0 boolean\u7c7b\u578b\u2192false String\u7c7b\u578b\u2192\u00a5u0000\uff09<\/p>\n
\u5982\u4e0b\u63cf\u8ff0\u4e5f\u53ef\u884c\uff1aint[] e[]\u3002<\/p>\n
\u5f53\u5c06int[ ] a = new int[0]\u58f0\u660e\u4e3a\u96f6\u4e2a\u5143\u7d20\u65f6\uff0c\u5c06\u663e\u793a\u54c8\u5e0c\u7801\u3002<\/p>\n
\u30fb\u7ee7\u627f\u5173\u7cfb\uff1a\u901a\u8fc7\u8d85\u7c7b\u7c7b\u578b\u7684\u6570\u7ec4\u7c7b\u578b\u53d8\u91cf\uff0c\u53ef\u4ee5\u5904\u7406\u5b50\u7c7b\u7684\u5b9e\u4f8b\u96c6\u5408\u3002<\/p>\n
public<\/span> interface<\/span> A<\/span>{}<\/span>\r\npublic<\/span> class<\/span> B<\/span> implements<\/span> A<\/span>{}<\/span>\r\n\r\npublic<\/span> class<\/span> Main<\/span>{<\/span>\r\n     public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>){<\/span>\r\n             A<\/span>[]<\/span> array<\/span> =<\/span> new<\/span> B<\/span>[]{<\/span>new<\/span> B<\/span>(),<\/span> new<\/span> B<\/span>()};<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u30fb\u65e0\u540d\u6570\u7ec4\uff1a\u65b9\u62ec\u53f7[]\u5185\u4e0d\u80fd\u653e\u7f6e\u6570\u5b57\u3002<\/p>\n
\/\/[]\u306e\u4e2d\u306b\u6570\u5b57\u306f\u5165\u308c\u306a\u3044\u3002<\/span>\r\nint<\/span>[]<\/span> array<\/span> =<\/span> new<\/span> int<\/span>[]<\/span> {}<\/span>\r\n\r\n\/\/\u8aa4\u3063\u305f\u8a18\u8ff0\u4f8b<\/span>\r\nint<\/span>[]<\/span> array<\/span> =<\/span> new<\/span> int<\/span>[<\/span>5<\/span>]<\/span> {}<\/span>\r\n<\/code><\/pre>\n
\u7b2c\u516d\u7ae0 \u5b9e\u4f8b\u548c\u65b9\u6cd5<\/p>\n
\u25c6\u9759\u6001\u5b57\u6bb5\u88abstatic\u4fee\u9970\u7684\u5b57\u6bb5\u548c\u65b9\u6cd5\u4f1a\u88ab\u653e\u7f6e\u5728\u79f0\u4e3a\u9759\u6001\u533a\u57df\u7684\u533a\u57df\u4e2d\u3002<\/p>\n
\u30fb\u8bbf\u95ee\u9759\u6001\u5b57\u6bb5
\n1. “\u7c7b\u540d.\u5b57\u6bb5\u540d”\uff08\u4f8b\u5982\uff09Sample.num = 10;
\n2. \u6309\u7167\u901a\u5e38\u7684\u65b9\u5f0f\u5b9e\u4f8b\u5316\uff0c\u5e76\u901a\u8fc7”\u5f15\u7528.\u5b57\u6bb5\u540d”\u8fdb\u884c\u8bbf\u95ee\u3002<\/p>\n
Sample<\/span> s<\/span> =<\/span> new<\/span> Sample<\/span>();<\/span>\r\ns<\/span>.<\/span>num<\/span> =<\/span> 10<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u30fb\u4ee5\u73ed\u7ea7\u4e3a\u5355\u4f4d\u8fdb\u884c\u7ba1\u7406 = \u5728\u4ece\u73ed\u7ea7\u521b\u5efa\u7684\u6240\u6709\u5b9e\u4f8b\u4e4b\u95f4\u5171\u4eab\u3002<\/p>\n
\u9759\u6001\u5b57\u6bb5\u53ef\u4ee5\u5728\u4e0d\u751f\u6210\u5b9e\u4f8b\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528\u3002<\/p>\n
\u53ea\u6709\u9759\u6001\u65b9\u6cd5\u624d\u80fd\u8bbf\u95ee\u9759\u6001\u6210\u5458\uff08\u5373\u7528static\u4fee\u9970\u7684\u5b57\u6bb5\u548c\u65b9\u6cd5\uff09\uff0c\u53cd\u8fc7\u6765\uff0c\u975e\u9759\u6001\u65b9\u6cd5\u53ef\u4ee5\u8bbf\u95ee\u9759\u6001\u6210\u5458\u3002<\/p>\n
\u25c6\u672c\u5730\u53d8\u91cf\u5982\u679c\u5f15\u7528\u4e86\u5c1a\u672a\u88ab\u521d\u59cb\u5316\u7684\u672c\u5730\u53d8\u91cf\uff0c\u5219\u4f1a\u51fa\u73b0\u7f16\u8bd1\u9519\u8bef\u3002
\n\u53ef\u4ee5\u4f7f\u7528final\u8fdb\u884c\u58f0\u660e\u3002<\/p>\n
\u8fd9\u5f53\u6211\u4eec\u5e0c\u671b\u4f18\u5148\u4f7f\u7528\u5b57\u6bb5\u53d8\u91cf\uff08\u5728\u65b9\u6cd5\u5916\u5b9a\u4e49\u7684\u7c7b\u53d8\u91cf\uff09\u800c\u4e0d\u662f\u5c40\u90e8\u53d8\u91cf\uff08\u5728\u65b9\u6cd5\u5185\u5b9a\u4e49\u7684\u53d8\u91cf\uff09\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b83\u3002<\/p>\n
\u25c6\u5b9e\u4f8b\u53ef\u4ee5\u4f7f\u7528\u53cc\u5f15\u53f7\u5c06\u6587\u5b57\u76f4\u63a5\u91cf\u62ec\u8d77\u6765\u521b\u5efa\u5b9e\u4f8b\u3002\uff08\u4f8b\u5982\uff1aString=”sample”;\uff09<\/p>\n
\u25c6\u8c03\u7528\u65b9\u6cd5
\n\u5982\u679c\u8fd4\u56de\u503c\u662fvoid\uff08\u5373\u4e0d\u8fd4\u56de\u4efb\u4f55\u503c\uff09\uff0c\u5728\u5199\u8fd4\u56de\u503c\u7684\u8d4b\u503c\u8868\u8fbe\u5f0f\u65f6\u4f1a\u51fa\u73b0\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n
class<\/span> Sample<\/span>{<\/span>\r\n    public<\/span> void<\/span> hello<\/span>(){<\/span>\r\n          system<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"hello\"<\/span>);<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n\r\npublic<\/span> class<\/span> Main<\/span>{<\/span>\r\n      public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>){<\/span>\r\n          Sample<\/span> s<\/span> =<\/span> new<\/span> Sample<\/span>();<\/span>\r\n          String<\/span> a<\/span> =<\/span> s<\/span>.<\/span>hello<\/span>();<\/span>  \/\/\u623b\u308a\u5024\u304cvoid\u578b\u306e\u30e1\u30bd\u30c3\u30c9\u3092\u4ee3\u5165\u3057\u3066\u3001<\/span>\r\n                                 \/\/s\u3067\u5024\u3092\u53d7\u3051\u53d6\u308d\u3046\u3068\u3057\u3066\u3044\u308b\u306e\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n          s<\/span>.<\/span>hello<\/span>();<\/span> \/\/\u305f\u3060\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u3060\u3051\u3067\u4f55\u3082\u53d7\u3051\u53d6\u3089\u306a\u3044\u306e\u3067\u30a8\u30e9\u30fc\u306b\u306a\u3089\u306a\u3044<\/span>\r\n  }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u25c6\u56de\u5f52\u6587\u30fb\u529f\u80fd1\uff1a\u5c06\u503c\u8fd4\u56de\u7ed9\u8c03\u7528\u65b9\u6cd5\u3002
\n\u30fb\u529f\u80fd2\uff1a\u5c06\u63a7\u5236\u8fd4\u56de\u7ed9\u8c03\u7528\u65b9\u3002\u5f3a\u5236\u7ed3\u675f\u65b9\u6cd5\u7684\u5904\u7406\uff0c\u5e76\u8fd4\u56de\u7ed9\u8c03\u7528\u65b9\u6cd5\u3002<\/p>\n
\u5728return\u8bed\u53e5\u4e4b\u540e\u6267\u884c\u7684\u4ee3\u7801\u662f\u4e0d\u53ef\u80fd\u7684\u3002\u5982\u679c\u5728return\u8bed\u53e5\u4e4b\u540e\u7f16\u5199\u4efb\u4f55\u5904\u7406\u4ee3\u7801\uff0c\u5c06\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n
\u25c6\u8d85\u8f7d\u91cd\u8f7d\u89c4\u5219\uff1a\u51fd\u6570\u7b7e\u540d\uff08\u53c2\u6570\u6570\u91cf\u3001\u7c7b\u578b\u3001\u987a\u5e8f\uff09\u5fc5\u987b\u4e0d\u540c\uff0c\u8bbf\u95ee\u4fee\u9970\u7b26\u7684\u5dee\u5f02\u4e0d\u91cd\u8981\u3002<\/p>\n
\u5982\u679c\u53ea\u6709\u8fd4\u56de\u503c\u7c7b\u578b\u4e0d\u540c\u7684\u65b9\u6cd5\uff0c\u5c06\u88ab\u89c6\u4e3a\u91cd\u590d\u5b58\u5728\u76f8\u540c\u65b9\u6cd5\uff0c\u800c\u4e0d\u4f1a\u88ab\u89c6\u4e3a\u91cd\u8f7d\uff0c\u4ece\u800c\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n
\u5e0c\u671b\u5bf9\u672a\u6b63\u786e\u91cd\u8f7d\u7684\u793a\u4f8b\u8fdb\u884c\u91cd\u8f7d\u3002
\n\u2192 \u5e0c\u671b\u5c06int calc(double a, int b){\u5904\u7406\u5185\u5bb9}\u91cd\u8f7d\u4e3adouble calc(double a, int b){\u5904\u7406\u5185\u5bb9}\uff1a\u53ea\u662f\u8fd4\u56de\u503c\u4e0d\u540c\uff0c\u5c1a\u672a\u8fdb\u884c\u91cd\u8f7d\u3002<\/p>\n
\u25c6\u6784\u9020\u51fd\u6570\u5f53\u8c03\u7528\u53e6\u4e00\u4e2a\u6784\u9020\u51fd\u6570\u65f6\uff0c\u4f7f\u7528\u5173\u952e\u5b57 “this”\u3002\u4e0d\u9996\u5148\u7f16\u5199\u6b64\u8bed\u53e5\u4f1a\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n
\u6784\u9020\u51fd\u6570\u53ea\u80fd\u5728\u5b9e\u4f8b\u751f\u6210\u65f6\u88ab\u8c03\u7528\u3002<\/p>\n
\u5982\u679c\u6709void\u6216\u5176\u4ed6\u8fd4\u56de\u7c7b\u578b\uff0c\u90a3\u4e48\u8fd9\u4e2a\u4e0d\u662f\u6784\u9020\u51fd\u6570\u3002<\/p>\n
\u5373\u4f7f\u4f7f\u7528extends\u7b49\u8fdb\u884c\u7ee7\u627f\uff0c\u4e5f\u4e0d\u4f1a\u4f20\u9012\u7ed9\u5b50\u7c7b\u3002<\/p>\n
\u5728\u4fee\u9970\u6784\u9020\u51fd\u6570\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u4e0a\u6ca1\u6709\u9650\u5236\u3002<\/p>\n
\u6784\u9020\u51fd\u6570\u94fe\uff1a\u5f53\u7f16\u8bd1\u5b50\u7c7b\u65f6\uff0c\u5b50\u7c7b\u7684\u6784\u9020\u51fd\u6570\u4e2d\u4f1a\u88ab\u6dfb\u52a0super();\u6765\u8c03\u7528\u8d85\u7c7b\u7684\u6784\u9020\u51fd\u6570\u3002<\/p>\n
public<\/span> class<\/span> B<\/span> extends<\/span> A<\/span>{<\/span>\r\n  B<\/span>(){<\/span>\r\n      this<\/span>(<\/span>4<\/span>);<\/span>\r\n      System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>\"3\"<\/span>);<\/span>\r\n   }<\/span>\r\n  B<\/span>(<\/span>int<\/span> b<\/span>){<\/span>\r\n      super<\/span>();<\/span> \/\/\u2190\u30b3\u30f3\u30d1\u30a4\u30eb\u3057\u3066\u8ffd\u52a0\u3055\u308c\u305f\u30b9\u30fc\u30d1\u30fc\u30af\u30e9\u30b9A\u306e\u547c\u3073\u51fa\u3057<\/span>\r\n      System<\/span>.<\/span>out<\/span>.<\/span>print<\/span>(<\/span>b<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6700\u540e\u7684\u30fb\u88abfinal\u4fee\u9970\u7684\u53d8\u91cf\u662f\u5e38\u91cf\uff0c\u65e0\u6cd5\u8fdb\u884c\u4fee\u6539\u3002
\n\u30fb\u4e3a\u4e86\u4fee\u6539\u53d8\u91cf\u7684\u503c\uff0c\u9700\u8981\u5728\u6784\u9020\u65b9\u6cd5\u4e2d\u8fdb\u884c\u521d\u59cb\u5316\u3002<\/p>\n
public<\/span> class<\/span> Sample<\/span>{<\/span>\r\n   private<\/span> final<\/span> int<\/span> num<\/span>;<\/span>     \/\/\u5b9a\u6570\u306e\u5ba3\u8a00<\/span>\r\n   pibliv<\/span> Sample<\/span>()<\/span> {}<\/span>         \/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5185\u3067\u5b9a\u6570\u3092\u521d\u671f\u5316\u3057\u3066\u3044\u306a\u3044\u306e\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u30a8\u30e9\u30fc<\/span>\r\n   public<\/span> Sample<\/span>(<\/span>int<\/span> num<\/span>){<\/span>\r\n       this<\/span>.<\/span>num<\/span> =<\/span> num<\/span>;<\/span>        \/\/\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u5185\u3067\u5b9a\u6570\u3092\u521d\u671f\u5316\u3057\u3066\u3044\u308b<\/span>\r\n   }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u25c6 \u53ef\u53d8\u957f\u53c2\u6570 (k\u011b sh\u00f9)- \u5141\u8bb8\u81ea\u7531\u66f4\u6539\u6570\u91cf\u7684\u53c2\u6570\u3002
\n– \u5728\u53c2\u6570\u7c7b\u578b\u540e\u9762\u52a0\u4e0a\u4e09\u4e2a\u53e5\u70b9\u8fdb\u884c\u58f0\u660e\u3002<\/p>\n
void<\/span> sample<\/span>(<\/span>int<\/span>...<\/span> num<\/span>){<\/span>\r\n       \/\/do something<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u30fb\u6ce8\u610f\u4e8b\u9879\uff1a
\n1. \u4e0d\u540c\u7c7b\u578b\u7684\u6570\u636e\u4e0d\u80fd\u5408\u5e76\u5728\u4e00\u8d77\u3002
\n2. \u5982\u679c\u9700\u8981\u5c06\u9664\u4e86\u53ef\u53d8\u957f\u53c2\u6570\u5916\u7684\u5176\u4ed6\u7c7b\u578b\u5305\u542b\u5728\u53c2\u6570\u4e2d\uff0c\u53ef\u53d8\u957f\u53c2\u6570\u5fc5\u987b\u5199\u5728\u6700\u540e\u3002<\/p>\n
\u7b2c\u4e03\u7ae0\uff1a\u7c7b\u7684\u7ee7\u627f\u3001\u63a5\u53e3\u548c\u62bd\u8c61\u7c7b<\/p>\n
\u25c6\u754c\u9762
\n\u3010\u57fa\u672c\u89c4\u5219\u3011
\n– \u7ee7\u627f\u4e86\u63a5\u53e3\u7684\u5177\u4f53\u7c7b\u5fc5\u987b\u5c06\u62bd\u8c61\u65b9\u6cd5\u91cd\u5199\u4e3a\u5177\u4f53\u65b9\u6cd5\u3002
\n– \u5728\u63a5\u53e3\u4e2d\u5b9e\u73b0\u7684\u62bd\u8c61\u65b9\u6cd5\u4f1a\u81ea\u52a8\u6210\u4e3apublic\u8bbf\u95ee\u4fee\u9970\u7b26\u3002
\n– \u65e0\u6cd5\u5b9e\u4f8b\u5316\u3002
\n– \u7ee7\u627f\u4e86\u63a5\u53e3\u7684\u7c7b\u5728\u8986\u76d6\u65b9\u6cd5\u65f6\u65e0\u6cd5\u6539\u53d8\u4e3a\u9664public\u5916\u7684\u5176\u4ed6\u8bbf\u95ee\u4fee\u9970\u7b26\u3002>>p.522
\n– \u53ea\u80fd\u5b9a\u4e49\u5e38\u91cf\u5b57\u6bb5\uff08static, final\uff09\u3002<\/p>\n
\u3010\u5176\u4ed6\u89c4\u5219\u3011
\n– \u9ed8\u8ba4\u65b9\u6cd5\uff1a\u4f7f\u7528\u9ed8\u8ba4\u65b9\u6cd5\u53ef\u4ee5\u7f16\u5199\u65b9\u6cd5\u7684\u5904\u7406\u5185\u5bb9\u3002\u7ee7\u627f\u63a5\u53e3\u7684\u7c7b\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u8be5\u65b9\u6cd5\u800c\u65e0\u9700\u8fdb\u884c\u8986\u5199\u3002
\n– \u5728\u8986\u5199\u62bd\u8c61\u65b9\u6cd5\u7684\u62bd\u8c61\u65b9\u6cd5\u4e2d\uff0c\u53ef\u4ee5\u6539\u53d8\u8fd4\u56de\u503c\u7684\u7c7b\u578b\u3002\uff08\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u7c7b\u578b\u5fc5\u987b\u662f\u8d85\u7ea7\u65b9\u6cd5\u6307\u5b9a\u7684\u7c7b\u578b\u7684\u5b50\u7c7b\u7c7b\u578b\u3002= ” \u534f\u53d8\u8fd4\u56de\u503c” \uff09>> p.523
\n– \u53ef\u4ee5\u5c06\u5b9e\u73b0\u5b9a\u4e49\u4e3a\u9ed8\u8ba4\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5\u3002<\/p>\n
\u25c6\u62bd\u8c61\u7c7b\u30fb\u53ef\u4ee5\u5b9a\u4e49\u62bd\u8c61\u65b9\u6cd5\u548c\u5177\u4f53\u65b9\u6cd5\u3002
\n\u30fb\u5728\u62bd\u8c61\u65b9\u6cd5\u4e0a\uff0c\u5fc5\u987b\u52a0\u4e0aabstract\u5173\u952e\u5b57\uff0c\u5e76\u4e14\u4e0d\u80fd\u5199\u5177\u4f53\u5185\u5bb9\u3002
\n\u30fb\u7531\u4e8e\u62bd\u8c61\u65b9\u6cd5\u9884\u8bbe\u4e3a\u9700\u8981\u88ab\u91cd\u5199\uff0c\u6240\u4ee5\u53ef\u4ee5\u81ea\u7531\u5730\u4f7f\u7528\u9664\u4e86private\u4ee5\u5916\u7684\u8bbf\u95ee\u4fee\u9970\u7b26\u8fdb\u884c\u8bbe\u7f6e\u3002
\n\u30fb\u5728\u7ee7\u627f\u62bd\u8c61\u7c7b\u7684\u5b50\u7c7b\u4e2d\uff0c\u5fc5\u987b\u8981\u91cd\u5199\u62bd\u8c61\u65b9\u6cd5\u3002
\n\u30fb\u4e0d\u80fd\u5b9e\u4f8b\u5316\u3002
\n\u30fb\u53ef\u4ee5\u5b9a\u4e49\u7ee7\u627f\u62bd\u8c61\u7c7b\u7684\u62bd\u8c61\u7c7b\u3002<\/p>\n
\u25c6\u91cd\u5199\u30fb\u91cd\u5199\u89c4\u5219\uff1a
\n\u25a0\u7b7e\u540d\uff08\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u7c7b\u578b\u3001\u53c2\u6570\u6570\u91cf\u3001\u987a\u5e8f\uff09\u5fc5\u987b\u76f8\u540c\u3002
\n\u25a0\u8fd4\u56de\u7c7b\u578b\u5fc5\u987b\u662f\u76f8\u540c\u7c7b\u578b\u6216\u5b50\u7c7b\u7c7b\u578b\u3002
\n\u25a0\u8bbf\u95ee\u4fee\u9970\u7b26\u5fc5\u987b\u76f8\u540c\u6216\u66f4\u5bbd\u677e\u3002
\n\u25a0\u58f0\u660e\u7684\u5f02\u5e38\u7c7b\u578b\u5fc5\u987b\u662f\u629b\u51fa\u7684\u5f02\u5e38\u7c7b\u578b\u6216\u5b50\u7c7b\u7c7b\u578b\u76f8\u540c\u3002<\/p>\n
\u25c6\u591a\u6001\u5c3d\u7ba1\u5177\u6709\u76f8\u540c\u7684\u65b9\u6cd5\u540d\u79f0\uff0c\u4f46\u5728\u4e00\u4e2a\u7c7b\u4e2d\u7684\u884c\u4e3a\u4e0e\u53e6\u4e00\u4e2a\u7c7b\u7684\u884c\u4e3a\u6709\u4e0d\u540c\u7684\u8868\u73b0\u3002<\/p>\n
\u7b2c\u4e5d\u7ae0 \u5e94\u7528\u7a0b\u5e8f\u7f16\u7a0b\u63a5\u53e3 (API)<\/p>\n
\u25c6\u5730\u56fe- \u4ee5\u952e\u548c\u503c\u7684\u7ec4\u5408\u8fdb\u884c\u7ba1\u7406\u7684\u96c6\u5408\u3002\u7c7b\u4f3c\u8868\u683c\u7684\u5f62\u8c61\u3002
\n– key\u65b9\u6cd5\uff1a\u53d6\u51fa\u952e\u3002
\n– value\u65b9\u6cd5\uff1a\u53d6\u51fa\u503c\u3002<\/p>\n
\u25c6\u52a8\u6001\u6570\u7ec4\u30fb\u4e0d\u662f\u7ebf\u7a0b\u5b89\u5168\u7684<\/p>\n
\u25c6\u6bd4\u8f83\u65b9\u6cd5\u6bd4\u8f83\u4e24\u4e2a\u6570\u7ec4\u7684\u5b57\u5178\u987a\u5e8f\u6392\u5e8f\u65f6\u7684\u6392\u5217\u987a\u5e8f\u3002
\n\u5982\u679c\u4e24\u4e2a\u6570\u7ec4\u76f8\u7b49\uff1a\u8fd4\u56de0\u3002
\n\u5982\u679c\u7b2c\u4e00\u4e2a\u53c2\u6570\u5728\u5b57\u5178\u987a\u5e8f\u4e2d\u5148\u4e8e\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff1a\u8fd4\u56de-1\u3002
\n\u5982\u679c\u7b2c\u4e00\u4e2a\u53c2\u6570\u5728\u5b57\u5178\u987a\u5e8f\u4e2d\u540e\u4e8e\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff1a\u8fd4\u56de1\u3002<\/p>\n
\u25c6\u6570\u5b66\u7c7b\u30fbMath.pow\uff1a\u83b7\u53d6\u5e42\u8fd0\u7b97\u7684\u7ed3\u679c\u3002\u4f8b\u5982\uff09Math.pow(2,3); \u2192 2\u76843\u6b21\u65b9\uff1d8
\n\u30fbMath.sqrt\uff1a\u4ee5double\u7c7b\u578b\u83b7\u53d6\u53c2\u6570\u7684\u5e73\u65b9\u6839\u3002\u4f8b\u5982\uff09Math.sqrt(16); \u21924.0\uff08\u56e0\u4e3a\u662fdouble\u7c7b\u578b\uff0c\u6240\u4ee5\u4f1a\u663e\u793a\u5230\u5c0f\u6570\u70b9\uff09
\n\u30fbMath.round\uff1a\u5c06\u53c2\u6570\u56db\u820d\u4e94\u5165\u5230\u5c0f\u6570\u70b9\u540e\u4e00\u4f4d\uff0c\u5e76\u8f6c\u6362\u4e3a\u6574\u6570\u3002<\/p>\n
\u25c6StringBuilder\u7c7b\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u5b83\u5177\u6709\u591a\u4f59\u768416\u4e2a\u5b57\u7b26\u7f13\u51b2\u533a\u3002
\n\u4f8b\u5982\uff1a\u5f53\u5728stringBuilder\u7c7b\u7684capacity()\u65b9\u6cd5\u4e2d\u68c0\u67e5\u5b57\u7b26\u4e32”abcde”\u7684\u5bb9\u91cf\u65f6\uff0c\u7ed3\u679c\u4e3a16+5=21\u3002<\/p>\n
\u7b2c\u5341\u7ae0 \u5f02\u5e38\u5904\u7406<\/p>\n
\u25c6 \u5f02\u5e38\u5904\u7406<\/p>\n
try<\/span> {<\/span>\r\n    \u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u51e6\u7406<\/span>\r\n}<\/span> catch<\/span> (<\/span>\u4f8b\u5916\u306e\u578b<\/span> \u5f15\u6570<\/span>)<\/span> {<\/span>\r\n    \u4f8b\u5916\u304c\u767a\u751f\u3057\u305f\u5834\u5408\u306e\u51e6\u7406<\/span>(<\/span>\u4f8b\u5916\u304c\u767a\u751f\u3057\u306a\u3051\u308c\u3070\u884c\u308f\u308c\u306a\u3044\u51e6\u7406<\/span>)<\/span>\r\n}<\/span> finally<\/span> {<\/span>\r\n    \u4f8b\u5916\u306e\u6709\u7121\u306b\u95a2\u308f\u3089\u305a<\/span>\u3001<\/span>\u6700\u5f8c\u306b\u5fc5\u305a\u5b9f\u884c\u3055\u308c\u308b\u51e6\u7406<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u30fb\u4f8b\u5916\u5904\u7406\u7684\u6267\u884c\u987a\u5e8f\uff1a\u2460close\u65b9\u6cd5 \u2192 \u2461catch\u5757 \u2192 \u2462finally\u5757
\n\u30fb\u5728\u7f16\u5199\u591a\u4e2acatch\u8bed\u53e5\u65f6\u8981\u6ce8\u610f\uff1a\u5148\u5199\u5b50\u7c7b\u7684\u5f02\u5e38\u3002\u5982\u679c\u5148\u5199\u7236\u7c7b\uff0c\u4f1a\u4ea7\u751f\u7f16\u8bd1\u9519\u8bef\u3002
\n\u30fbthrow\uff1a\u5728\u5e0c\u671b\u6709\u610f\u5f15\u53d1\u5f02\u5e38\u65f6\uff0c\u5c06\u5176\u5199\u5165\u5904\u7406\u5185\u5bb9\u4e2d\u3002
\n\u30fbthrows\uff1a\u5fc5\u987b\u5728\u629b\u51fa\u5df2\u68c0\u67e5\u5f02\u5e38\u7684\u65b9\u6cd5\u4e2d\u5199\u5165\u3002\u5982\u679c\u5728main\u65b9\u6cd5\u4e2d\u6355\u83b7\uff0c\u53ef\u4ee5\u4f7f\u7528throws\u58f0\u660e\uff0c\u6216\u8005\u5c06Exception\u4f5c\u4e3acatch\u7684\u53c2\u6570\uff08catch(Exception)\uff09\u3002
\n\u30fb\u5f53try-catch\u5d4c\u5957\u65f6\uff0c\u63a5\u6536\u629b\u51fa\u7684\u5f02\u5e38\u7684\u662f\u4e0e\u8be5\u5f02\u5e38\u5bf9\u5e94\u7684\u6700\u8fd1\u7684catch\u5757\u3002
\n\u30fb\u5728try\u5757\u4e2d\u58f0\u660e\u7684\u53d8\u91cf\u7684\u6709\u6548\u8303\u56f4\u9650\u4e8etry\u5757\u5185\u90e8\u3002
\n\u30fb\u975e\u68c0\u67e5\u5f02\u5e38\uff1aRuntimeException\u53ca\u5176\u5b50\u7c7b\u3002\u4e0d\u9700\u8981\u4f7f\u7528throws\u58f0\u660e\u3002
\n\u30fb\u5982\u679creturn\u8bed\u53e5\u4f4d\u4e8e\u6700\u540e\uff0c\u5c06\u6309\u7167finally \u2192 catch\u7684\u987a\u5e8f\u8f93\u51fa\u3002
\n\u30fb\u8fd4\u56de\u503c\u7684\u5b58\u653e\u5bb9\u5668\u53ea\u6709\u4e00\u4e2a\uff0c\u56e0\u6b64\u6700\u540e\u4e00\u4e2areturn\u8bed\u53e5\u8fd4\u56de\u7684\u503c\u5c06\u6210\u4e3a\u6700\u7ec8\u7684\u503c\u3002<\/p>\n
\u25c6 \u4e3b\u8981\u7684\u4f8b\u5916\u7684\u7c7b\u578b\u30fb\u7a7a\u6307\u9488\u5f02\u5e38\uff1a\u5f53\u8c03\u7528\u5305\u542b\u7a7a\u503c\u7684\u6570\u7ec4\u65f6\u629b\u51fa\u7684\u5f02\u5e38\u3002\u5728System.out.print()\u4e2d\u663e\u793a\u65f6\u4e0d\u4f1a\u629b\u51fa\u3002
\n\u30fb\u7d22\u5f15\u8d8a\u754c\u5f02\u5e38\uff1aArrayIndexOutOfBoundsException\u548cStringIndexOutOfBoundsException\u7684\u7236\u7c7b\u3002
\n\u30fb\u7c7b\u8f6c\u6362\u5f02\u5e38\uff1a\u5f53\u5c06\u4e00\u4e2a\u5bf9\u8c61\u8f6c\u6362\u4e3a\u4e0d\u76f8\u5173\u7684\u7c7b\u65f6\uff0c\u629b\u51fa\u8be5\u5f02\u5e38\u4ee5\u6307\u793a\u6b64\u64cd\u4f5c\u3002
\n\u30fb\u5e76\u53d1\u4fee\u6539\u5f02\u5e38\uff1a\u5f53\u68c0\u6d4b\u5230\u7981\u6b62\u8fdb\u884c\u5bf9\u8c61\u7684\u5e76\u53d1\u4fee\u6539\u7684\u65b9\u6cd5\u5c1d\u8bd5\u8fdb\u884c\u4fee\u6539\u65f6\u629b\u51fa\u7684\u5f02\u5e38\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u4e2a\u7ebf\u7a0b\u6309\u987a\u5e8f\u53d6\u51fa\u6570\u7ec4\u7684\u503c\u65f6\uff0c\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u5c1d\u8bd5\u4fee\u6539\u6570\u7ec4\u7684\u503c\u3002
\n\u30fb\u4e0d\u652f\u6301\u7684\u64cd\u4f5c\u5f02\u5e38\uff1a\u5f53\u5bf9\u4e0d\u53ef\u4fee\u6539\u7684\u96c6\u5408\u8fdb\u884c\u4fee\u6539\u65f6\u629b\u51fa\u7684\u5f02\u5e38\u3002\u4f8b\u5982\uff0c\u5f53\u5bf9\u4f7f\u7528list.of\u521b\u5efa\u7684\u6570\u7ec4\u8fdb\u884c\u4fee\u6539\u65f6\u3002<\/p>\n
\u7b2c11\u7ae0 \u6a21\u5757\u5316\u7cfb\u7edf\u3010\u547d\u4ee4\u7c7b\u578b\u3011
\njava –describe-module jmod describe\uff1a\u67e5\u770b\u6a21\u5757\u7684\u914d\u7f6e\u4fe1\u606f
\njdeps –list-deps java –show-module-resolution\uff1a\u67e5\u770b\u7c7b\u548c\u6a21\u5757\u7684\u4f9d\u8d56\u5173\u7cfb<\/p>\n","protected":false},"excerpt":{"rendered":"
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