{"id":2197,"date":"2020-08-27T14:24:25","date_gmt":"2020-08-27T06:24:25","guid":{"rendered":"http:\/\/127.0.0.2\/?p=2197"},"modified":"2020-08-27T15:55:15","modified_gmt":"2020-08-27T07:55:15","slug":"2020java%e6%95%99%e7%a8%8b%ef%bc%9a%e5%bc%82%e5%b8%b8%e8%af%be%e5%90%8e%e4%b9%a0%e9%a2%98","status":"publish","type":"post","link":"https:\/\/www.9713job.com\/?p=2197","title":{"rendered":"2020java\u6559\u7a0b\uff1a\u5f02\u5e38\u8bfe\u540e\u4e60\u9898"},"content":{"rendered":"

\u5f02\u5e38\u8bfe\u540e\u4e60\u9898<\/h3>\n

1.\u586b\u7a7a
\njava\u4e2d\u6240\u6709\u7684\u9519\u8bef\u90fd\u7ee7\u627f\u81eaThrowable<\/u><\/strong>\u7c7b\uff1b
\n\u5728\u8be5\u7c7b\u7684\u5b50\u7c7b\u4e2d\uff0cError<\/u><\/strong>\u7c7b\u8868\u793a\u4e25\u91cd\u7684\u5e95\u5c42\u9519\u8bef\uff0c\u5bf9\u4e8e\u8fd9\u7c7b\u9519\u8bef\u4e00\u822c\u5904\u7406\u7684\u65b9\u6cd5\u662f\u91cd\u65b0\u4e66\u5199\u91cd\u65b0\u7f16\u8bd1\u91cd\u65b0\u8fd0\u884c<\/u><\/strong>\uff1bException<\/u><\/strong>\u7c7b\u8868\u793a\u4f8b\u5916\u3001\u5f02\u5e38<\/p>\n

2.\u67e5\u8be2API\uff0c\u586b\u7a7a
\n– \u5f02\u5e38\u7c7bjava.rmi.AlreadyBoundException\uff0c\u4ece\u5206\u7c7b\u4e0a\u8bf4\uff0c\u8be5\u7c7b\u5c5e\u4e8e\u53d7\u67e5<\/u><\/strong>\u5f02\u5e38\uff0c\u4ece\u5904\u7406\u65b9\u5f0f\u4e0a\u8bf4\uff0c\u5bf9\u8fd9\u79cd\u5f02\u5e38\u5fc5\u987b<\/u><\/strong>\u5904\u7406\uff1b
\n– \u5f02\u5e38\u7c7bjava.util.regex.PatternSyntaxException\uff0c\u4ece\u5206\u7c7b\u4e0a\u8bf4\uff0c\u8be5\u7c7b\u5c5e\u4e8e\u8fd0\u884c\u65f6<\/u><\/strong>\u5f02\u5e38\uff0c\u4ece\u5904\u7406\u65b9\u5f0f\u4e0a\u8bf4\uff0c\u5bf9\u8fd9\u79cd\u5f02\u5e38\u53ef\u5904\u7406\u4e5f\u53ef\u4e0d<\/u><\/strong>\u5904\u7406\u3002<\/p>\n

3.\u5199\u51fa\u7ed3\u679c
\n\u5f53\u8bfb\u5165\u7684 n \u5206\u522b\u4e3a 1\uff0c2\uff0c3\uff0c4\uff0c5 \u65f6\uff0c\u8f93\u51fa\u7684\u7ed3\u679c\u5206\u522b\u662f\u4ec0\u4e48\uff1f<\/p>\n

import java.io.*;\r\nimport java.sql.SQLException;\r\n\r\npublic class demos{\r\n    public static void main(String[] args) {\r\n        System.out.println(\"main 1\");\r\n        int n=1;\r\n        ma(n);\r\n        System.out.println(\"main 2\");\r\n    }\r\n    public static void ma(int n){\r\n        try {\r\n            System.out.println(\"ma1\");\r\n            mb(n);\r\n            System.out.println(\"ma2\");\r\n        }catch (EOFException e){\r\n            System.out.println(\"Catch EOFException\");\r\n        }catch (IOException e){\r\n            System.out.println(\"Catch IOException\");\r\n        }catch (SQLException e){\r\n            System.out.println(\"Catch SQLException\");\r\n        }catch (Exception e){\r\n            System.out.println(\"Catch Exception\");\r\n        }finally {\r\n            System.out.println(\"In finally\");\r\n        }\r\n    }\r\n    public static void mb(int n) throws Exception{\r\n        System.out.println(\"mb1\");\r\n        if(n==1)throw new EOFException();\r\n        if(n==2)throw new FileNotFoundException();\r\n        if(n==3)throw new SQLException();\r\n        if(n==4)throw new NullPointerException();\r\n        System.out.println(\"mb2\");\r\n    }\r\n}\r\n\/*\r\nn==1:\r\nmain 1\r\nma1\r\nmb1\r\nCatch EOFException\r\nIn finally\r\nmain2\r\nn==2:\r\nmain1\r\nma1\r\nmb1\r\nCatch Exception\r\nIn finally\r\nmain2\r\nn==3:\r\nmain1\r\nma1\r\nmb1\r\nCatch SQLException\r\nIn finally\r\nmain2\r\nn==4:\r\nmain1\r\nma1\r\nmb1\r\nCatch Exception\r\nIn finally\r\nmain2\r\nn==5:\r\nmain1\r\nma1\r\nmb1\r\nmb2\r\nma2\r\nIn finally\r\nmain2\r\n *\/<\/pre>\n
4.try-catch\uff0c\u5c40\u90e8\u53d8\u91cf\uff0c\u4ee5\u4e0b\u4ee3\u7801\u662f\u5426\u901a\u8fc7<\/p>\n
public class demos{\r\n    public static void main(String[] args) {\r\n        System.out.println(ma());\r\n    }\r\n    public static int ma(){\r\n        \/\/\u7a0b\u5e8f\u4e0d\u901a\u8fc7\uff0c\u56e0n\u672a\u6b63\u786e\u8d4b\u503c\r\n        int n;\r\n        try{\r\n            n=10\/0;\r\n        }catch (Exception e){}\r\n        return n;\r\n    }\r\n}<\/pre>\n
5.try-catch-finally<\/p>\n
public class demos{\r\n    public static void main(String[] args) {\r\n        System.out.println(ma());\r\n        \/*\r\n        \u5728 ma \u4e2d\uff0c\u5f53\u8bfb\u5165\u7684 b \u4e3a 100 \u65f6\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3a\u591a\u5c11\uff0c\u5f53\u8bfb\u5165\u7684 b \u4e3a 0 \u65f6\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3a\u591a\u5c11\r\n         *\/\r\n    }\r\n    public static int ma(){\r\n        int n=0;\r\n        try{\r\n            int b=100;\r\n            return b\/n;\r\n        }catch (Exception e){\r\n            return 10;\r\n        }finally {\r\n            return 100;\r\n        }\r\n    }\r\n}<\/pre>\n
6.\u4ee5\u4e0b\u4ee3\u7801\u662f\u5426\u80fd\u7f16\u8bd1\u901a\u8fc7\uff1f\u5982\u679c\u4e0d\u80fd\uff0c\u5e94\u8be5\u5982\u4f55\u4fee\u6539\uff1f<\/p>\n
import java.io.*;\r\nclass MySuper{\r\n    public void m() throws IOException{}\r\n}\r\nclass MySub extends MySuper{\r\n    @Override\r\n    public void m() throws EOFException{}\r\n}\r\nclass MySub2 extends MySub{\r\n    @Override\r\n    \/*\u7f16\u8bd1\u9519\u8bef\uff0c\u8be5\u5f02\u5e38\u5c5e\u4e8eIO\u5f02\u5e38\u5b50\u7c7b\uff0c\u4e0d\u5c5e\u4e8eEOFException\u5b50\u7c7b\r\n    \u4eceMySub\u7ee7\u627f\u4e0d\u80fd\u6bd4MySub\u629b\u51fa\u66f4\u591a\u7684\u5f02\u5e38\r\n     *\/\r\n    public void m() throws FileNotFoundException{}\r\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"
\u5f02\u5e38\u8bfe\u540e\u4e60\u9898 1.\u586b\u7a7a java\u4e2d\u6240\u6709\u7684\u9519\u8bef\u90fd\u7ee7\u627f\u81eaThrowable\u7c7b\uff1b \u5728\u8be5\u7c7b\u7684\u5b50\u7c7b\u4e2d\uff0cError\u7c7b\u8868\u793a\u4e25 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-2197","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2197"}],"version-history":[{"count":4,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2197\/revisions"}],"predecessor-version":[{"id":2201,"href":"https:\/\/www.9713job.com\/index.php?rest_route=\/wp\/v2\/posts\/2197\/revisions\/2201"}],"wp:attachment":[{"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.9713job.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}