{"id":31588,"date":"2023-06-20T05:10:04","date_gmt":"2023-05-16T05:48:52","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ejava%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86\/"},"modified":"2024-04-30T09:44:26","modified_gmt":"2024-04-30T01:44:26","slug":"%e5%85%b3%e4%ba%8ejava%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8ejava%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86\/","title":{"rendered":"\u5173\u4e8eJava\u5f02\u5e38\u5904\u7406"},"content":{"rendered":"

\u9996\u5148<\/h2>\n

\u9019\u7bc7\u6587\u7ae0\u662f\u6211\u5c0d\u5373\u5c07\u958b\u59cb\u5b78\u7fd2Java\u7684\u4eba\u7684\u7406\u89e3\u5167\u5bb9\u8a18\u9304\u3002<\/p>\n

\u6211\u5011\u5c07\u6839\u64da\u4e0b\u9762\u7684\u6e05\u55ae\uff0c\u5206\u985e\u5217\u8209\u6709\u95dcJava\u529f\u80fd\u8207\u4f7f\u7528\u65b9\u6cd5\u7684\u5167\u5bb9\u3002\u6b64\u6b21\u662f\u95dc\u65bc\u4f8b\u5916\u8655\u7406\u7684\u90e8\u5206\u3002<\/p>\n

\u30fb\u53d8\u91cf\u548c\u7c7b\u578b\uff0c\u7c7b\u578b\u8f6c\u6362
\n\u30fb\u53d8\u91cf\u7684\u4f5c\u7528\u57df
\n\u30fb\u5b57\u7b26\u4e32\u64cd\u4f5c\uff08\u51c6\u5907\u4e2d\uff09
\n\u30fb\u6570\u7ec4\u64cd\u4f5c\uff08\u51c6\u5907\u4e2d\uff09
\n\u30fb\u8fd0\u7b97\u7b26\uff08\u51c6\u5907\u4e2d\uff09
\n\u30fb\u6761\u4ef6\u5206\u652f\uff08\u51c6\u5907\u4e2d\uff09
\n\u30fb\u5faa\u73af\u5904\u7406\uff08\u51c6\u5907\u4e2d\uff09
\n\u30fb\u5f02\u5e38\u5904\u7406\uff08\u5f53\u524d\u9875\u9762\uff09
\n\u30fb\u5173\u4e8e\u7c7b\uff08\u51c6\u5907\u4e2d\uff09
\n\u30fb\u62bd\u8c61\u7c7b\uff08\u51c6\u5907\u4e2d\uff09
\n\u30fb\u63a5\u53e3\uff08\u51c6\u5907\u4e2d\uff09
\n\u30fb\u5c01\u88c5\uff08\u51c6\u5907\u4e2d\uff09
\n\u30fb\u5173\u4e8e\u6a21\u5757\uff08\u51c6\u5907\u4e2d\uff09<\/p>\n

\u4f8b\u5916\u5904\u7406\u662f\u6307\u5728\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u5f02\u5e38\u60c5\u51b5\u65f6\uff0c\u5bf9\u8fd9\u4e9b\u5f02\u5e38\u60c5\u51b5\u8fdb\u884c\u7279\u6b8a\u5904\u7406\u7684\u673a\u5236\u3002<\/h2>\n

\u4f5c\u4e3a\u5f02\u5e38\u5904\u7406\u7684\u601d\u8003\u65b9\u6cd5\uff0c\u662f\u5728\u4ee3\u7801\u4e2d\u5047\u8bbe\u51fa\u73b0\u4e86\u610f\u5916\u7684\u884c\u4e3a\uff0c\u5e76\u9884\u5148\u7f16\u5199\u76f8\u5e94\u7684\u5904\u7406\u65b9\u5f0f\uff0c\u4ee5\u5e94\u5bf9\u5f02\u5e38\u7684\u53d1\u751f\u3002<\/p>\n

\u4f8b\u5916\u5728\u672c\u8d28\u4e0a\u662f\u4ec0\u4e48\uff0c\u4e0e\u9519\u8bef\u6709\u4f55\u533a\u522b\uff1f<\/h2>\n

\u4f8b\u5916\uff08Exception\uff09\u662f\u6307\u5728\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u7684\u5f02\u5e38\u4e8b\u4ef6\u3002\u901a\u5e38\u4f1a\u4e0e\u9519\u8bef\uff08Error\uff09\u6df7\u6dc6\uff0c\u4f46\u5b83\u4eec\u662f\u5b8c\u5168\u4e0d\u540c\u7684\u4e1c\u897f\uff0c\u9519\u8bef\u662f\u865a\u62df\u673a\u65e0\u6cd5\u5904\u7406\u7684\u5f02\u5e38\u4e8b\u4ef6\uff0c\u4f1a\u5bfc\u81f4\u5f3a\u5236\u7ec8\u6b62\uff0c\u56e0\u6b64\u65e0\u6cd5\u901a\u8fc7\u4f8b\u5916\u5904\u7406\u8fdb\u884c\u5e94\u5bf9\u3002
\n\u5728\u4f8b\u5916\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u7ee7\u7eed\u8fdb\u884c\u7a0b\u5e8f\u8fd0\u884c\uff0c\u800c\u4e0d\u9700\u8981\u7ec8\u6b62\u3002<\/p>\n

\u5173\u4e8e\u5f02\u5e38\u5904\u7406\u673a\u5236<\/h2>\n

\u6211\u5c06\u89e3\u91ca\u4e00\u4e0btry-catch\u8bed\u53e5\u3002<\/p>\n

class<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n        try<\/span>{<\/span>\r\n            int<\/span>[]<\/span> array<\/span> =<\/span> {<\/span>0<\/span>,<\/span>1<\/span>,<\/span>2<\/span>};<\/span>\r\n\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>array<\/span>[<\/span>3<\/span>]);<\/span>\r\n        }<\/span>catch<\/span>(<\/span>ArrayIndexOutOfBoundsException<\/span> e<\/span>){<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u4f8b\u5916\u304c\u51fa\u307e\u3057\u305f\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e0a\u8ff0\u7684\u8bb0\u5f55\u91c7\u7528\u4e86try~catch\u7684\u5f62\u5f0f\u3002\u5176\u673a\u5236\u662f\uff0c\u5728try\u548ccatch\u5185\u90e8\uff0c\u5f53\u629b\u51fa\u4e0ecatch\u7c7b\u76f8\u540c\u7684\u5f02\u5e38\u65f6\uff0c\u5c06\u5f02\u5e38\u6d88\u606f\u4f20\u9012\u7ed9catch\uff08exception message\uff09\uff0c\u7136\u540e\u6267\u884ccatch\u5185\u90e8\u7684\u4ee3\u7801\u3002\u5e0c\u671b\u60a8\u80fd\u7406\u89e3\u8fd9\u4e2a\u5927\u81f4\u7684\u6982\u5ff5\u3002<\/p>\n
\u7f16\u8bd1\u5e76\u6267\u884c<\/p>\n
\u4f8b\u5916\u304c\u51fa\u307e\u3057\u305f\r\n<\/code><\/pre>\n
\u5728\u4e2d\u6587\u4e2d\u53ef\u4ee5\u8fd9\u6837\u8868\u8fbe\uff1a\u663e\u793a\u4e86\u3002catch\u8bed\u53e5\u5757\u4e2d\u7684\u5185\u5bb9\u6b63\u5728\u8fd0\u884c\u3002<\/p>\n
\u68c0\u67e5\u5f02\u5e38 (\u68c0\u67e5\u4f8b\u5916)<\/h2>\n
\u300c\u30c1\u30a7\u30c3\u30af\u4f8b\u5916\u300d\u3068\u306f\u3001\u4f8b\u5916\u51e6\u7406\u3092\u884c\u308f\u306a\u3044\u3068\u5b9f\u884c\u3067\u304d\u306a\u3044\u51e6\u7406\u306b\u304a\u3044\u3066\u4f7f\u7528\u3055\u308c\u308b\u4f8b\u5916\u51e6\u7406\u306e\u3053\u3068\u3067\u3059\u3002\u5177\u4f53\u7684\u306a\u4f8b\u3092\u6319\u3052\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u4ee5\u4e0b\u7684\u4ee3\u7801\u6ca1\u6709\u5f02\u5e38\u5904\u7406\u3002<\/p>\n
import<\/span> java.io.BufferedReader<\/span>;<\/span>\r\nimport<\/span> java.io.FileReader<\/span>;<\/span>\r\nimport<\/span> java.io.IOException<\/span>;<\/span>\r\n\r\nclass<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n        BufferedReader<\/span> bufferReader<\/span> =<\/span> null<\/span>;<\/span>\r\n        FileReader<\/span> fileReaderr<\/span> =<\/span> null<\/span>;<\/span>\r\n\r\n        \/\/ \u5165\u529b\u30d5\u30a1\u30a4\u30eb<\/span>\r\n        fileReaderr<\/span> =<\/span> new<\/span> FileReader<\/span>(<\/span>\"test.txt\"<\/span>);<\/span>\r\n        bufferReader<\/span> =<\/span> new<\/span> BufferedReader<\/span>(<\/span>fileReaderr<\/span>);<\/span>\r\n\r\n        \/\/ 1\u884c\u3065\u3064\u8aad\u307f\u8fbc\u3093\u3067\u51fa\u529b<\/span>\r\n        String<\/span> line<\/span>;<\/span>\r\n        while<\/span> ((<\/span>line<\/span> =<\/span> bufferReader<\/span>.<\/span>readLine<\/span>())<\/span> !=<\/span> null<\/span>)<\/span> {<\/span>\r\n\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>line<\/span>);<\/span>\r\n\r\n            \/\/\u610f\u56f3\u7684\u306b\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u9589\u3058\u3001IOException\u3092\u767a\u751f\u3055\u305b\u308b<\/span>\r\n            bufferReader<\/span>.<\/span>close<\/span>();<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5c1d\u8bd5\u7f16\u8bd1\u8fd9\u4e2a<\/p>\n
test.java:11: \u30a8\u30e9\u30fc: \u4f8b\u5916FileNotFoundException\u306f\u5831\u544a\u3055\u308c\u307e\u305b\u3093\u3002\u30b9\u30ed\u30fc\u3059\u308b\u306b\u306f\u3001\u6355\u6349\u307e\u305f\u306f\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\r\n        fileReaderr = new FileReader(\"test.txt\");\r\n                      ^\r\ntest.java:16: \u30a8\u30e9\u30fc: \u4f8b\u5916IOException\u306f\u5831\u544a\u3055\u308c\u307e\u305b\u3093\u3002\u30b9\u30ed\u30fc\u3059\u308b\u306b\u306f\u3001\u6355\u6349\u307e\u305f\u306f\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\r\n        while ((line = bufferReader.readLine()) != null) {\r\n                                            ^\r\ntest.java:21: \u30a8\u30e9\u30fc: \u4f8b\u5916IOException\u306f\u5831\u544a\u3055\u308c\u307e\u305b\u3093\u3002\u30b9\u30ed\u30fc\u3059\u308b\u306b\u306f\u3001\u6355\u6349\u307e\u305f\u306f\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\r\n            bufferReader.close();\r\n                              ^\r\n<\/code><\/pre>\n
\u53ef\u80fd\u6709\u70b9\u96be\u4ee5\u7406\u89e3\uff0c\u4f46\u4e0a\u8ff0\u63cf\u8ff0\u7684\u610f\u601d\u662f\uff0c\u5982\u679c\u6ca1\u6709\u5f02\u5e38\u5904\u7406\uff0c\u8fd9\u4e2a\u64cd\u4f5c\u5c06\u4e0d\u8d77\u4f5c\u7528\u3002<\/p>\n
\u5982\u679c\u4e0d\u5728\u4ee3\u7801\u4e2d\u5904\u7406IOException\uff0c\u5b83\u5c06\u4e0d\u5141\u8bb8\u7f16\u8bd1\u901a\u8fc7\u3002\u56e0\u6b64\uff0cIOException\u662f\u53d7\u68c0\u5f02\u5e38\u7684\u4e00\u79cd\u3002<\/p>\n
\u6240\u4ee5\u8ba9\u6211\u4eec\u8bd5\u8bd5\u7528try~catch\u6765\u5305\u56f4\u8fd9\u4e9b\u64cd\u4f5c\u7684\u90e8\u5206\u3002<\/p>\n
\r\nimport<\/span> java.io.BufferedReader<\/span>;<\/span>\r\nimport<\/span> java.io.FileReader<\/span>;<\/span>\r\nimport<\/span> java.io.IOException<\/span>;<\/span>\r\n\r\nclass<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n        BufferedReader<\/span> bufferReader<\/span> =<\/span> null<\/span>;<\/span>\r\n        FileReader<\/span> fileReaderr<\/span> =<\/span> null<\/span>;<\/span>\r\n\r\n        try<\/span> {<\/span>\r\n            \/\/ \u5165\u529b\u30d5\u30a1\u30a4\u30eb<\/span>\r\n            fileReaderr<\/span> =<\/span> new<\/span> FileReader<\/span>(<\/span>\"test.txt\"<\/span>);<\/span>\r\n            bufferReader<\/span> =<\/span> new<\/span> BufferedReader<\/span>(<\/span>fileReaderr<\/span>);<\/span>\r\n\r\n            \/\/ 1\u884c\u3065\u3064\u8aad\u307f\u8fbc\u3093\u3067\u51fa\u529b<\/span>\r\n            String<\/span> line<\/span>;<\/span>\r\n            while<\/span> ((<\/span>line<\/span> =<\/span> bufferReader<\/span>.<\/span>readLine<\/span>())<\/span> !=<\/span> null<\/span>)<\/span> {<\/span>\r\n\r\n                System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>line<\/span>);<\/span>\r\n\r\n                \/\/\u610f\u56f3\u7684\u306b\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u9589\u3058\u3001IOException\u3092\u767a\u751f\u3055\u305b\u308b<\/span>\r\n                bufferReader<\/span>.<\/span>close<\/span>();<\/span>\r\n            }<\/span>\r\n        }<\/span> catch<\/span> (<\/span>IOException<\/span> e<\/span>)<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"IOException\u304c\u767a\u751f\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u5f53\u7f16\u8bd1\u5e76\u8fd0\u884c\u8fd9\u4e2a\u3002<\/p>\n
IOException\u304c\u767a\u751f\r\n<\/code><\/pre>\n
\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\uff0c\u901a\u8fc7\u8bfb\u53d6txt\u6587\u4ef6\u5e76\u5728while\u5faa\u73af\u4e2d\u5f3a\u5236\u9000\u51fa\uff0c\u5728try\u5757\u4e2d\u4f1a\u53d1\u751fIOException\u3002\u8fd9\u65f6\u5f02\u5e38\u5904\u7406\u8d77\u4f5c\u7528\uff0c\u6267\u884ccatch\u5757\u4e2d\u7684\u8f93\u51fa\u64cd\u4f5c\u3002<\/p>\n
\u6b64\u5916\uff0c\u60a8\u8fd8\u53ef\u4ee5\u901a\u8fc7\u5728\u65b9\u6cd5\u4e2d\u5b9a\u4e49throws\u6765\u907f\u514d\u7f16\u8bd1\u9519\u8bef\u3002<\/p>\n
import<\/span> java.io.BufferedReader<\/span>;<\/span>\r\nimport<\/span> java.io.FileReader<\/span>;<\/span>\r\nimport<\/span> java.io.IOException<\/span>;<\/span>\r\n\r\nclass<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[])<\/span> throws<\/span> IOException<\/span>{<\/span>\r\n        BufferedReader<\/span> bufferReader<\/span> =<\/span> null<\/span>;<\/span>\r\n        FileReader<\/span> fileReaderr<\/span> =<\/span> null<\/span>;<\/span>\r\n\r\n        \/\/ \u5165\u529b\u30d5\u30a1\u30a4\u30eb<\/span>\r\n        fileReaderr<\/span> =<\/span> new<\/span> FileReader<\/span>(<\/span>\"test.txt\"<\/span>);<\/span>\r\n        bufferReader<\/span> =<\/span> new<\/span> BufferedReader<\/span>(<\/span>fileReaderr<\/span>);<\/span>\r\n\r\n        \/\/ 1\u884c\u3065\u3064\u8aad\u307f\u8fbc\u3093\u3067\u51fa\u529b<\/span>\r\n        String<\/span> line<\/span>;<\/span>\r\n        while<\/span> ((<\/span>line<\/span> =<\/span> bufferReader<\/span>.<\/span>readLine<\/span>())<\/span> !=<\/span> null<\/span>)<\/span> {<\/span>\r\n\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>line<\/span>);<\/span>\r\n\r\n            \/\/\u610f\u56f3\u7684\u306b\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u9589\u3058\u3001IOException\u3092\u767a\u751f\u3055\u305b\u308b<\/span>\r\n            bufferReader<\/span>.<\/span>close<\/span>();<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u6bb5\u63cf\u8ff0\u662f\u53ef\u4ee5\u7f16\u8bd1\u7684\u3002\u8fd9\u6bb5\u63cf\u8ff0\u4e5f\u53ef\u4ee5\u5904\u7406\u68c0\u67e5\u5f02\u5e38\u3002\u6267\u884c\u7684\u65f6\u5019\u5c31\u597d\u4e86\u3002<\/p>\n
Exception in thread \"main\" java.io.FileNotFoundException: test.txt (No such file or directory)\r\n    at java.base\/java.io.FileInputStream.open0(Native Method)\r\n    at java.base\/java.io.FileInputStream.open(FileInputStream.java:212)\r\n    at java.base\/java.io.FileInputStream.<init>(FileInputStream.java:154)\r\n    at java.base\/java.io.FileInputStream.<init>(FileInputStream.java:109)\r\n    at java.base\/java.io.FileReader.<init>(FileReader.java:60)\r\n    at Main.main(test.java:11)\r\n<\/code><\/pre>\n
\u5728\u6267\u884c\u8fc7\u7a0b\u4e2d\u53d1\u751f\u5f02\u5e38\uff0c\u5904\u7406\u5c06\u7ec8\u6b62\u3002\u4e0etry~catch\u4e0d\u540c\u4e4b\u5904\u5728\u4e8e\u6ca1\u6709\u5f02\u5e38\u53d1\u751f\u65f6\u7684\u5904\u7406\uff08catch\uff09\u3002<\/p>\n
\u4f5c\u4e3a\u5904\u7406\u6d41\u7a0b\uff0c\u9996\u5148\u53d1\u751f\u7684\u662fIOException\uff0c\u6b64\u65f6\u4f1a\u76f4\u63a5\u8df3\u8f6c\u5230catch\u8bed\u53e5\u8fdb\u884c\u5904\u7406\uff0c\u56e0\u6b64\u4e0d\u4f1a\u53d1\u751f\u5176\u4ed6\u5f02\u5e38\u64cd\u4f5c\u3002<\/p>\n
throws\u6b64\u65f6\u53ea\u662f\u8868\u793aIOException\u662f\u88ab\u5141\u8bb8\u7684\u72b6\u6001\uff0c\u968f\u540e\u53d1\u751f\u4e86\u5176\u4ed6\u5f02\u5e38\u5e76\u5bfc\u81f4\u7a0b\u5e8f\u7ec8\u6b62\u3002\u5173\u4e8ethrows\u7684\u8be6\u7ec6\u4fe1\u606f\u8bf7\u53c2\u9605\u53e6\u4e00\u90e8\u5206\u7684\u8bf4\u660e\u3002<\/p>\n
\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u6211\u542c\u8bf4\u53ea\u6709Java\u6709\u4e00\u4e2a\u53eb\u505a\u201c\u68c0\u67e5\u5f02\u5e38\u201d\u7684\u6982\u5ff5\u3002\u6240\u4ee5\u90a3\u4e9b\u4ece\u5176\u4ed6\u7f16\u7a0b\u8bed\u8a00\u8f6c\u6765\u7684\u4eba\u53ef\u80fd\u4f1a\u56e0\u4e3a\u4ee3\u7801\u6ca1\u6709\u95ee\u9898\u5374\u9047\u5230\u9519\u8bef\u800c\u611f\u5230\u56f0\u60d1\u3002<\/p>\n
\u975e\u68c0\u67e5\u5f02\u5e38<\/h2>\n
\u8fd9\u4e2a\u5728\u5176\u4ed6\u8bed\u8a00\u4e2d\u4e5f\u5f88\u5e38\u89c1\u7684\u5f62\u5f0f\uff0c\u662f\u6307\u5199\u5165\u5f02\u5e38\u5904\u7406\u662f\u9488\u5bf9\u4efb\u610f\u5f02\u5e38\u7684\u3002\u8fd9\u6b21\u6211\u4eec\u6253\u7b97\u7528ArrayIndexOutOfBoundsException\uff08\u8bbf\u95ee\u4e0d\u5b58\u5728\u7684\u6570\u7ec4\u5143\u7d20\uff09\u6765\u786e\u8ba4\u3002<\/p>\n
\u8fd9\u91cc\u662f\u6ca1\u6709\u5f02\u5e38\u5904\u7406\u7684\u8bf4\u660e\u3002<\/p>\n
class<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n        int<\/span>[]<\/span> array<\/span> =<\/span> {<\/span>0<\/span>,<\/span>1<\/span>,<\/span>2<\/span>};<\/span>\r\n\r\n        System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>array<\/span>[<\/span>3<\/span>]);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5c1d\u8bd5\u5f15\u7528\u6570\u7ec4array\u7684\u7b2c\u4e09\u4e2a\u5143\u7d20\uff0c\u4f46\u53ea\u67090\u52302\u7684\u5143\u7d20\u53ef\u7528\u3002\u5373\u4f7f\u6ca1\u6709\u7f16\u8bd1\u9519\u8bef\uff0c\u4f46\u6267\u884c\u65f6\u4e5f\u4f1a\u9047\u5230\u95ee\u9898\u3002<\/p>\n
Exception in thread \"main\" java.lang.ArrayIndexOutOfBoundsException: Index 3 out of bounds for length 3\r\n    at Main.main(test.java:6)\r\n<\/code><\/pre>\n
\u51fa\u73b0\u4e86 ArrayIndexOutOfBoundsException\u3002\u88ab\u544a\u77e5\u5728\u5c1d\u8bd5\u67e5\u770b\u6570\u7ec4\u8303\u56f4\u5916\u3002<\/p>\n
\u6211\u5c06\u52a0\u5165\u5f02\u5e38\u5904\u7406\u5e76\u5c1d\u8bd5\u8fd0\u884c\u3002\u4ee5\u4e0b\u662f\u6807\u9898\u4e2d\u7684\u5f02\u5e38\u5904\u7406\u673a\u5236\u6240\u63cf\u8ff0\u7684\u4ee3\u7801\u3002<\/p>\n
\u7f16\u8bd1\u901a\u8fc7\u540e\uff0c\u6267\u884c\u65f6\u8868\u73b0\u76f8\u540c\u3002<\/p>\n
\u4f8b\u5916\u304c\u51fa\u307e\u3057\u305f\r\n<\/code><\/pre>\n
\u6211\u80fd\u591f\u9605\u8bfb\u5230 catch \u6587\u4e2d\u7684\u4fe1\u606f\u3002<\/p>\n
\u57fa\u672c\u4e0a\u53ef\u4ee5\u907f\u514d\u5904\u7406\u7684\u9519\u8bef\u88ab\u79f0\u4e3a\u975e\u68c0\u67e5\u5f02\u5e38\uff0c\u6ca1\u6709\u4e49\u52a1\u8fdb\u884c\u8bb0\u5f55\u3002\u6211\u89c9\u5f97\u66f4\u591a\u662f\u51fa\u4e8e\u8c28\u614e\u7684\u610f\u601d\u3002<\/p>\n
\u6700\u540e<\/h2>\n
\u63a5\u4e0b\u6765\u6211\u4f1a\u4ecb\u7ecd\u4e00\u79cd\u5728catch\u540e\u9762\u4f7f\u7528finally\u7684\u60c5\u51b5\u3002<\/p>\n
class<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n        try<\/span>{<\/span>\r\n            int<\/span>[]<\/span> array<\/span> =<\/span> {<\/span>0<\/span>,<\/span>1<\/span>,<\/span>2<\/span>};<\/span>\r\n\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>array<\/span>[<\/span>2<\/span>]);<\/span>\r\n        }<\/span>catch<\/span>(<\/span>ArrayIndexOutOfBoundsException<\/span> e<\/span>){<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u4f8b\u5916\u304c\u51fa\u307e\u3057\u305f\"<\/span>);<\/span>\r\n        }<\/span>finally<\/span>{<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u3069\u3061\u3089\u3067\u3082\u52d5\u304f\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u4e2a\u6ca1\u6709\u5f02\u5e38\u7684\u5904\u7406\uff0c\u4f46\u662f\u5f53\u7f16\u8bd1\u5e76\u6267\u884c\u65f6\u3002<\/p>\n
2\r\n\u3069\u3061\u3089\u3067\u3082\u52d5\u304f\r\n<\/code><\/pre>\n
\u4ee5\u7c7b\u4f3c\u7684\u65b9\u5f0f\uff0c\u6700\u540e\u7684\u5904\u7406\u4e5f\u5728finally\u5757\u4e2d\u8fd0\u884c\u3002\u73b0\u5728\u6211\u4eec\u5c1d\u8bd5\u4e00\u4e2a\u629b\u51fa\u5f02\u5e38\u7684\u60c5\u51b5\u3002<\/p>\n
class<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n        try<\/span>{<\/span>\r\n            int<\/span>[]<\/span> array<\/span> =<\/span> {<\/span>0<\/span>,<\/span>1<\/span>,<\/span>2<\/span>};<\/span>\r\n\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>array<\/span>[<\/span>3<\/span>]);<\/span>\r\n        }<\/span>catch<\/span>(<\/span>ArrayIndexOutOfBoundsException<\/span> e<\/span>){<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u4f8b\u5916\u304c\u51fa\u307e\u3057\u305f\"<\/span>);<\/span>\r\n        }<\/span>finally<\/span>{<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u3069\u3061\u3089\u3067\u3082\u52d5\u304f\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5f53\u8fdb\u884c\u7f16\u8bd1\u548c\u6267\u884c\u65f6<\/p>\n
\u4f8b\u5916\u304c\u51fa\u307e\u3057\u305f\r\n\u3069\u3061\u3089\u3067\u3082\u52d5\u304f\r\n<\/code><\/pre>\n
\u663e\u793a\u5982\u4e0b\u3002
\n\u65e0\u8bba\u662f\u5426\u51fa\u73b0\u5f02\u5e38\uff0c\u5728try\u8bed\u53e5\u5757\u4e2d\u90fd\u8fdb\u884c\u4e86\u663e\u793a\u3002\u4e0d\u7ba1\u662f\u54ea\u4e00\u79cd\u60c5\u51b5\uff0c\u60f3\u8981\u6267\u884c\u7684\u64cd\u4f5c\u90fd\u5e94\u5728\u6b64\u5904\u8fdb\u884c\u8bb0\u5f55\u3002<\/p>\n
\u629b\u63b7<\/h2>\n
\u8fc7\u53bb\u6211\u4eec\u4e00\u76f4\u6309\u7167\u5728\u53d1\u751f\u5f02\u5e38\u65f6\u6267\u884c\u8fd9\u4e2a\u64cd\u4f5c\u7684\u6d41\u7a0b\u6765\u5904\u7406\u5f02\u5e38\uff0c\u4f46\u662f\u901a\u8fc7throw\u8bed\u53e5\u6211\u4eec\u53ef\u4ee5\u8ba9\u81ea\u5df1\u6765\u89e6\u53d1\u5f02\u5e38\u5904\u7406\uff08\u672f\u8bed\u4e0a\u79f0\u4e3a\u629b\u51fa\u5f02\u5e38\uff09\u3002<\/p>\n
\u9996\u5148\uff0c\u8ba9\u6211\u4eec\u5c1d\u8bd5\u5199\u51fathrow\u7684\u4ee3\u7801\u3002<\/p>\n
class<\/span> Main<\/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>\"\u4f8b\u5916\u30b9\u30ed\u30fc\"<\/span>);<\/span>\r\n        try<\/span>{<\/span>\r\n            throw<\/span> new<\/span> Exception<\/span>(<\/span>\"\u4f8b\u5916\u3092\u6295\u3052\u308b\"<\/span>);<\/span>\r\n        }<\/span>catch<\/span>(<\/span>Exception<\/span> e<\/span>){<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u4f8b\u5916\u51e6\u7406\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u4e00\u65e6\u6267\u884c<\/p>\n
\u4f8b\u5916\u30b9\u30ed\u30fc\r\n\u4f8b\u5916\u51e6\u7406\r\n<\/code><\/pre>\n
\u8be5\u5904\u7406\u5728try\u8bed\u53e5\u4e2d\u6267\u884c\u3002<\/p>\n
throw<\/span> new<\/span> IOException<\/span>(<\/span>\"\u4f8b\u5916\u3092\u6295\u3052\u308b\"<\/span>);<\/span>\r\n<\/code><\/pre>\n
\u6b63\u5728\u8fd0\u884c\u3002\u5728\u8fd9\u4e2a\u4ee3\u7801\u6bb5\u4e2d\uff0c\u89e6\u53d1\u4e86\u4e00\u4e2a\u5f02\u5e38\uff0c\u88ab\u6355\u6349\u5230\u7684catch\u8bed\u53e5\u5c06\u8fdb\u884c\u5904\u7406\u5e76\u8f93\u51fa\u4e24\u4e2a\u7ed3\u679c\u3002<\/p>\n
\u6295\u63b7<\/h2>\n
throws\u662f\u4e00\u79cd\u5728\u5f02\u5e38\u53d1\u751f\u65f6\u5728\u65b9\u6cd5\u8c03\u7528\u6e90\u4e2d\u8fdb\u884c\u5f02\u5e38\u5904\u7406\u7684\u6307\u5b9a\u3002
\n\u56e0\u4e3a\u4ec5\u4ec5\u8fd9\u53e5\u8bdd\u53ef\u80fd\u4e0d\u5bb9\u6613\u7406\u89e3\uff0c\u6240\u4ee5\u6211\u4e5f\u4f1a\u5b9e\u9645\u5199\u4e0b\u6765\u3002<\/p>\n
class<\/span> Main<\/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>\"\u4f8b\u5916\u30b9\u30ed\u30fc\"<\/span>);<\/span>\r\n        try<\/span>{<\/span>\r\n            Main<\/span>.<\/span>mikan<\/span>();<\/span>\r\n        }<\/span>catch<\/span>(<\/span>Exception<\/span> e<\/span>){<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"\u4f8b\u5916\u51e6\u7406\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n    static<\/span> void<\/span> mikan<\/span>()<\/span> throws<\/span> Exception<\/span>{<\/span>\r\n        throw<\/span> new<\/span> Exception<\/span>(<\/span>\"\u4f8b\u5916\u3092\u6295\u3052\u308b\"<\/span>);<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7f16\u8bd1\u5e76\u8fd0\u884c<\/p>\n
\u4f8b\u5916\u30b9\u30ed\u30fc\r\n\u4f8b\u5916\u51e6\u7406\r\n<\/code><\/pre>\n
\u5728\u4ee3\u7801\u4e2d\u663e\u793a\u4e3a\uff1a\u201c\u3068\u8868\u793a\u3055\u308c\u307e\u3059\u201d\u3002\u7a0b\u5e8f\u7684\u6d41\u7a0b\u662f\u5728main\u65b9\u6cd5\u7684try\u8bed\u53e5\u5757\u5185\u8c03\u7528\u4e86mikan\u65b9\u6cd5\u3002<\/p>\n
\u5728\u8c03\u7528\u7684mikan\u65b9\u6cd5\u4e2d\u5b9a\u4e49\u4e86throws Exception\u3002\u7b80\u5355\u5730\u8bf4\uff0c\u5b83\u7684\u610f\u601d\u662f\u5982\u679c\u5728\u65b9\u6cd5\u5185\u90e8\u53d1\u751f\u4e86\u5f02\u5e38\uff0c\u5c31\u5c06\u5176\u4f20\u9012\u7ed9\u8c03\u7528\u8005\u3002<\/p>\n
\u5728\u65b9\u6cd5\u5185\u90e8\u5f15\u53d1\u4e86\u4e00\u4e2a\u5f02\u5e38\uff0c\u7136\u540e\u5c06\u5f02\u5e38\u629b\u7ed9\u8c03\u7528\u8005\u3002\u6355\u83b7\u8bed\u53e5\u4f1a\u6355\u6349\u5230\u5f02\u5e38\u5e76\u6267\u884c\u5f02\u5e38\u5904\u7406\u8f93\u51fa\uff0c\u8fd9\u662f\u6574\u4e2a\u6d41\u7a0b\u7684\u4e00\u7cfb\u5217\u6b65\u9aa4\u3002<\/p>\n
\u4e0d\u8fc7\uff0c\u4e3a\u4e86\u65b9\u4fbf\u7406\u89e3\u6837\u4f8b\uff0c\u6211\u4eec\u5728\u8fd9\u91cc\u4f7f\u7528catch\u8bed\u53e5\u6765\u6355\u83b7\u5f02\u5e38\u5904\u7406\u3002\u4f46\u5b9e\u9645\u4e0a\uff0c\u5728\u5b9e\u9645\u7f16\u5199\u4ee3\u7801\u65f6\uff0c\u6700\u597d\u662f\u8bb0\u5f55\u4e0b\u6b64\u65b9\u6cd5\u53ef\u80fd\u53d1\u751f\u7684\u5f02\u5e38\u3002\u56e0\u6b64\uff0c\u63a5\u4e0b\u6765\u7684\u6837\u4f8b\u5c06\u88ab\u5199\u6210\u63a5\u6536IOException\uff08\u68c0\u67e5\u5f02\u5e38\uff09\u7684\u65b9\u5f0f\u3002<\/p>\n
\u5bf9\u4e8e\u4f7f\u7528throws\u7684\u65b9\u6cd5\u6765\u8bf4\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\u5982\u679c\u5c06\u5176\u5b9a\u4e49\u4e3a\u629b\u51fa\u4e86checked exception\uff0c\u90a3\u4e48\u5728\u8c03\u7528\u8be5\u65b9\u6cd5\u65f6\u672a\u4f7f\u7528try~catch\u8bed\u53e5\u8fdb\u884c\u5305\u56f4\u5c06\u4f1a\u5bfc\u81f4\u9519\u8bef\uff1b\u800c\u5982\u679c\u8be5\u65b9\u6cd5\u672a\u5b9a\u4e49throws\u8bed\u53e5\uff0c\u5219\u65e0\u8bba\u662f\u5426\u5728\u8c03\u7528\u5904\u4f7f\u7528\u4e86try~catch\u8bed\u53e5\u8fdb\u884c\u5305\u56f4\uff0c\u90fd\u4f1a\u5bfc\u81f4\u9519\u8bef\u3002\u6211\u4e5f\u4f1a\u5c06\u5176\u5b9e\u9645\u5199\u51fa\u6765\u3002<\/p>\n
\u8fd9\u91cc\u7684\u65b9\u6cd5\u8c03\u7528\u88abtry~catch\u8bed\u53e5\u5757\u5305\u56f4\uff0c\u4f46\u65b9\u6cd5\u672c\u8eab\u5e76\u6ca1\u6709\u5b9a\u4e49throws\u3002<\/p>\n
import<\/span> java.io.BufferedReader<\/span>;<\/span>\r\nimport<\/span> java.io.FileReader<\/span>;<\/span>\r\nimport<\/span> java.io.IOException<\/span>;<\/span>\r\n\r\nclass<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n        try<\/span>{<\/span>\r\n            Main<\/span>.<\/span>mikan<\/span>();<\/span>\r\n        }<\/span>catch<\/span>(<\/span>IOException<\/span> e<\/span>){<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"IOException\u304c\u51fa\u3066\u3044\u307e\u3059\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n    static<\/span> void<\/span> mikan<\/span>(){<\/span>\r\n        BufferedReader<\/span> bufferReader<\/span> =<\/span> null<\/span>;<\/span>\r\n        FileReader<\/span> fileReaderr<\/span> =<\/span> null<\/span>;<\/span>\r\n        \/\/ \u5165\u529b\u30d5\u30a1\u30a4\u30eb<\/span>\r\n        fileReaderr<\/span> =<\/span> new<\/span> FileReader<\/span>(<\/span>\"test.txt\"<\/span>);<\/span>\r\n        bufferReader<\/span> =<\/span> new<\/span> BufferedReader<\/span>(<\/span>fileReaderr<\/span>);<\/span>\r\n\r\n        \/\/ 1\u884c\u3065\u3064\u8aad\u307f\u8fbc\u3093\u3067\u51fa\u529b<\/span>\r\n        String<\/span> line<\/span>;<\/span>\r\n        while<\/span> ((<\/span>line<\/span> =<\/span> bufferReader<\/span>.<\/span>readLine<\/span>())<\/span> !=<\/span> null<\/span>)<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>line<\/span>);<\/span>\r\n\r\n            \/\/\u610f\u56f3\u7684\u306b\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u9589\u3058\u3001IOException\u3092\u767a\u751f\u3055\u305b\u308b<\/span>\r\n            bufferReader<\/span>.<\/span>close<\/span>();<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5f53\u8bd5\u56fe\u7f16\u8bd1\u8fd9\u4e2a\u4ee3\u7801<\/p>\n
test.java:9: \u30a8\u30e9\u30fc: \u4f8b\u5916IOException\u306f\u5bfe\u5fdc\u3059\u308btry\u6587\u306e\u672c\u4f53\u3067\u306f\u30b9\u30ed\u30fc\u3055\u308c\u307e\u305b\u3093\r\n        }catch(IOException e){\r\n         ^\r\ntest.java:18: \u30a8\u30e9\u30fc: \u4f8b\u5916FileNotFoundException\u306f\u5831\u544a\u3055\u308c\u307e\u305b\u3093\u3002\u30b9\u30ed\u30fc\u3059\u308b\u306b\u306f\u3001\u6355\u6349\u307e\u305f\u306f\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\r\n        fileReaderr = new FileReader(\"test.txt\");\r\n                      ^\r\ntest.java:23: \u30a8\u30e9\u30fc: \u4f8b\u5916IOException\u306f\u5831\u544a\u3055\u308c\u307e\u305b\u3093\u3002\u30b9\u30ed\u30fc\u3059\u308b\u306b\u306f\u3001\u6355\u6349\u307e\u305f\u306f\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\r\n        while ((line = bufferReader.readLine()) != null) {\r\n                                            ^\r\ntest.java:27: \u30a8\u30e9\u30fc: \u4f8b\u5916IOException\u306f\u5831\u544a\u3055\u308c\u307e\u305b\u3093\u3002\u30b9\u30ed\u30fc\u3059\u308b\u306b\u306f\u3001\u6355\u6349\u307e\u305f\u306f\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\r\n            bufferReader.close();\r\n                              ^\r\n\u30a8\u30e9\u30fc4\u500b\r\n<\/code><\/pre>\n
\u4f1a\u663e\u793a\u9519\u8bef\u3002\u4e0b\u9762\u7684\u4e09\u4e2a\u9519\u8bef\u4e0e\u6ca1\u6709\u4f7f\u7528try-catch\u5757\u65f6\u7684\u9519\u8bef\u5185\u5bb9\u76f8\u4f3c\uff0c\u5b83\u4eec\u662f\u9488\u5bf9\u68c0\u67e5\u5f02\u5e38\u7684\uff0c\u4f46\u4f3c\u4e4e\u6ca1\u6709\u63d0\u4f9b\u9488\u5bf9IOException\u7684\u5904\u7406\u3002\u8fd9\u662f\u4e00\u79cd\u9519\u8bef\u7684\u72b6\u6001\u3002<\/p>\n
\u4e0a\u9762\u7684\u9519\u8bef\u662f\u5728try-catch\u5757\u4e2d\u8868\u793aIOException\u4e0d\u4f1a\u53d1\u751f\u7684\u9519\u8bef\u3002\u5b9e\u9645\u4e0a\uff0c\u5b83\u53d1\u751f\u5728\u65b9\u6cd5\u5185\u90e8\uff0c\u4f46\u7531\u4e8e\u6ca1\u6709\u58f0\u660e\u5b83\uff0c\u6240\u4ee5try\u5757\u65e0\u6cd5\u8fdb\u884c\u786e\u8ba4\u3002<\/p>\n
\u8ba9\u6211\u4eec\u68c0\u67e5\u4e00\u4e0b\u6ca1\u6709\u5728\u65b9\u6cd5\u8c03\u7528\u65b9\u4e2d\u8fdb\u884ctry~catch\u7684\u60c5\u51b5\uff0c\u800c\u5728\u65b9\u6cd5\u4e2d\u5b9a\u4e49\u4e86throws\u7684\u60c5\u51b5\u4e0b\u7684\u64cd\u4f5c\u3002<\/p>\n
import<\/span> java.io.BufferedReader<\/span>;<\/span>\r\nimport<\/span> java.io.FileReader<\/span>;<\/span>\r\nimport<\/span> java.io.IOException<\/span>;<\/span>\r\n\r\nclass<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n        Main<\/span>.<\/span>mikan<\/span>();<\/span>\r\n    }<\/span>\r\n\r\n    static<\/span> void<\/span> mikan<\/span>()<\/span> throws<\/span> IOException<\/span>{<\/span>\r\n        BufferedReader<\/span> bufferReader<\/span> =<\/span> null<\/span>;<\/span>\r\n        FileReader<\/span> fileReaderr<\/span> =<\/span> null<\/span>;<\/span>\r\n        \/\/ \u5165\u529b\u30d5\u30a1\u30a4\u30eb<\/span>\r\n        fileReaderr<\/span> =<\/span> new<\/span> FileReader<\/span>(<\/span>\"test.txt\"<\/span>);<\/span>\r\n        bufferReader<\/span> =<\/span> new<\/span> BufferedReader<\/span>(<\/span>fileReaderr<\/span>);<\/span>\r\n\r\n        \/\/ 1\u884c\u3065\u3064\u8aad\u307f\u8fbc\u3093\u3067\u51fa\u529b<\/span>\r\n        String<\/span> line<\/span>;<\/span>\r\n        while<\/span> ((<\/span>line<\/span> =<\/span> bufferReader<\/span>.<\/span>readLine<\/span>())<\/span> !=<\/span> null<\/span>)<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>line<\/span>);<\/span>\r\n\r\n            \/\/\u610f\u56f3\u7684\u306b\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u9589\u3058\u3001IOException\u3092\u767a\u751f\u3055\u305b\u308b<\/span>\r\n            bufferReader<\/span>.<\/span>close<\/span>();<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u6bb5\u4ee3\u7801\u662f\u5173\u4e8e\u68c0\u67e5\u5f02\u5e38\u6837\u4f8b\u7684\uff0c\u5fc5\u987b\u4f7f\u7528try\u8bed\u53e5\u5757\u5305\u56f4\u7684\u5904\u7406\u65b9\u5f0f\u88ab\u5199\u5165\u4e86mikan\u65b9\u6cd5\u4e2d\u3002\u5c1d\u8bd5\u7f16\u8bd1\u8fd9\u6bb5\u4ee3\u7801\u7684\u8bdd<\/p>\n
\u4f8b\u5916IOException\u306f\u5831\u544a\u3055\u308c\u307e\u305b\u3093\u3002\u30b9\u30ed\u30fc\u3059\u308b\u306b\u306f\u3001\u6355\u6349\u307e\u305f\u306f\u5ba3\u8a00\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\r\n        Main.mikan();\r\n                  ^\r\n<\/code><\/pre>\n
\u51fa\u73b0\u9519\u8bef\u3002\u8fd9\u4e0e\u4e4b\u524d\u7684\u60c5\u51b5\u76f8\u53cd\uff0c\u8868\u793a\u8c03\u7528\u65b9\u53d1\u751f\u4e86IOException\uff0c\u6839\u636ethrows\u5b9a\u4e49\u5df2\u7ecf\u77e5\u9053\u8fd9\u79cd\u60c5\u51b5\u662f\u53ef\u80fd\u53d1\u751f\u7684\uff0c\u4f46\u7531\u4e8e\u5b83\u662fchecked exception\uff0c\u6240\u4ee5\u5fc5\u987b\u7528try~catch\u5757\u6765\u5904\u7406\u3002<\/p>\n
\u5c06\u4e0a\u8ff0\u7684\u793a\u4f8b\u653e\u5165try\u8bed\u53e5\u5757\u4e2d\u3002<\/p>\n
import<\/span> java.io.BufferedReader<\/span>;<\/span>\r\nimport<\/span> java.io.FileReader<\/span>;<\/span>\r\nimport<\/span> java.io.IOException<\/span>;<\/span>\r\n\r\nclass<\/span> Main<\/span>{<\/span>\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span> args<\/span>[]){<\/span>\r\n        try<\/span>{<\/span>\r\n            Main<\/span>.<\/span>mikan<\/span>();<\/span>\r\n        }<\/span>catch<\/span>(<\/span>IOException<\/span> e<\/span>){<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>\"IOException\u304c\u51fa\u3066\u3044\u307e\u3059\"<\/span>);<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n\r\n    static<\/span> void<\/span> mikan<\/span>()<\/span> throws<\/span> IOException<\/span>{<\/span>\r\n        BufferedReader<\/span> bufferReader<\/span> =<\/span> null<\/span>;<\/span>\r\n        FileReader<\/span> fileReaderr<\/span> =<\/span> null<\/span>;<\/span>\r\n        \/\/ \u5165\u529b\u30d5\u30a1\u30a4\u30eb<\/span>\r\n        fileReaderr<\/span> =<\/span> new<\/span> FileReader<\/span>(<\/span>\"test.txt\"<\/span>);<\/span>\r\n        bufferReader<\/span> =<\/span> new<\/span> BufferedReader<\/span>(<\/span>fileReaderr<\/span>);<\/span>\r\n\r\n        \/\/ 1\u884c\u3065\u3064\u8aad\u307f\u8fbc\u3093\u3067\u51fa\u529b<\/span>\r\n        String<\/span> line<\/span>;<\/span>\r\n        while<\/span> ((<\/span>line<\/span> =<\/span> bufferReader<\/span>.<\/span>readLine<\/span>())<\/span> !=<\/span> null<\/span>)<\/span> {<\/span>\r\n            System<\/span>.<\/span>out<\/span>.<\/span>println<\/span>(<\/span>line<\/span>);<\/span>\r\n\r\n            \/\/\u610f\u56f3\u7684\u306b\u30b9\u30c8\u30ea\u30fc\u30e0\u3092\u9589\u3058\u3001IOException\u3092\u767a\u751f\u3055\u305b\u308b<\/span>\r\n            bufferReader<\/span>.<\/span>close<\/span>();<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5c06\u5176\u7f16\u8bd1\u548c\u6267\u884c\u5c31\u53ef\u4ee5\u4e86<\/p>\n
IOException\u304c\u51fa\u3066\u3044\u307e\u3059\r\n<\/code><\/pre>\n
\u5728\u8c03\u7528\u90e8\u5206\u7684catch\u5757\u4e2d\u53ef\u4ee5\u8fdb\u884c\u8f93\u51fa\u5904\u7406\u3002\u5f53\u5b58\u5728\u7531throws\u5b9a\u4e49\u7684\u68c0\u67e5\u5f02\u5e38\u65f6\uff0c\u8bf7\u6ce8\u610f\u8c03\u7528\u8005\u7684\u8bf4\u660e\u3002<\/p>\n
\u7ed3\u675f<\/h2>\n
\u5728\u524d\u9762\u7684\u8ba8\u8bba\u4e2d\uff0c\u6211\u4eec\u5df2\u7ecf\u8c08\u5230\u4e86\u4e00\u4e9b\u5173\u4e8e\u4f8b\u5916\u7684\u5185\u5bb9\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60Java\uff0c\u6211\u8ba4\u4e3a\u4e86\u89e3\u5e76\u786e\u8ba4\u68c0\u67e5\u4f8b\u5916\u80fd\u5e2e\u52a9\u4f60\u5904\u7406\u9519\u8bef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u9996\u5148 \u9019\u7bc7\u6587\u7ae0\u662f\u6211\u5c0d\u5373\u5c07\u958b\u59cb\u5b78\u7fd2Java\u7684\u4eba\u7684\u7406\u89e3\u5167\u5bb9\u8a18\u9304\u3002 \u6211\u5011\u5c07\u6839\u64da\u4e0b\u9762\u7684\u6e05\u55ae\uff0c\u5206\u985e\u5217\u8209\u6709\u95dcJava\u529f\u80fd\u8207 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-31588","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u5173\u4e8eJava\u5f02\u5e38\u5904\u7406 - Blog - Silicon Cloud<\/title>\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\/\u5173\u4e8ejava\u5f02\u5e38\u5904\u7406\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5173\u4e8eJava\u5f02\u5e38\u5904\u7406\" \/>\n<meta property=\"og:description\" content=\"\u9996\u5148 \u9019\u7bc7\u6587\u7ae0\u662f\u6211\u5c0d\u5373\u5c07\u958b\u59cb\u5b78\u7fd2Java\u7684\u4eba\u7684\u7406\u89e3\u5167\u5bb9\u8a18\u9304\u3002 \u6211\u5011\u5c07\u6839\u64da\u4e0b\u9762\u7684\u6e05\u55ae\uff0c\u5206\u985e\u5217\u8209\u6709\u95dcJava\u529f\u80fd\u8207 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5173\u4e8ejava\u5f02\u5e38\u5904\u7406\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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