“`”<\/p>\n
<h3> Java\u5f02\u5e38\u7c7b\u5c42\u6b21\u7ed3\u6784\u56fe<\/h3><\/p>\n
<img alt=""Java\u5f02\u5e38\u7c7b\u5c42\u6b21\u7ed3\u6784\u56fe"" src=""https:\/\/my-blog-to-use.oss-cn-beijing.aliyuncs.com\/2019-2\/Exception.png""><\/p>\n
\u5728 Java \u4e2d\uff0c\u6240\u6709\u7684\u5f02\u5e38\u90fd\u6709\u4e00\u4e2a\u5171\u540c\u7684\u7956\u5148java.lang\u5305\u4e2d\u7684 <strong>Throwable\u7c7b<\/strong>\u3002Throwable\uff1a \u6709\u4e24\u4e2a\u91cd\u8981\u7684\u5b50\u7c7b\uff1a<strong>Exception\uff08\u5f02\u5e38\uff09<\/strong> \u548c <strong>Error\uff08\u9519\u8bef\uff09<\/strong> \uff0c\u4e8c\u8005\u90fd\u662f Java \u5f02\u5e38\u5904\u7406\u7684\u91cd\u8981\u5b50\u7c7b\uff0c\u5404\u81ea\u90fd\u5305\u542b\u5927\u91cf\u5b50\u7c7b\u3002<\/p>\n
<strong>Error\uff08\u9519\u8bef\uff09:\u662f\u7a0b\u5e8f\u65e0\u6cd5\u5904\u7406\u7684\u9519\u8bef<\/strong>\uff0c\u8868\u793a\u8fd0\u884c\u5e94\u7528\u7a0b\u5e8f\u4e2d\u8f83\u4e25\u91cd\u95ee\u9898\u3002\u5927\u591a\u6570\u9519\u8bef\u4e0e\u4ee3\u7801\u7f16\u5199\u8005\u6267\u884c\u7684\u64cd\u4f5c\u65e0\u5173\uff0c\u800c\u8868\u793a\u4ee3\u7801\u8fd0\u884c\u65f6 JVM\uff08Java \u865a\u62df\u673a\uff09\u51fa\u73b0\u7684\u95ee\u9898\u3002\u4f8b\u5982\uff0cJava\u865a\u62df\u673a\u8fd0\u884c\u9519\u8bef\uff08Virtual MachineError\uff09\uff0c\u5f53 JVM \u4e0d\u518d\u6709\u7ee7\u7eed\u6267\u884c\u64cd\u4f5c\u6240\u9700\u7684\u5185\u5b58\u8d44\u6e90\u65f6\uff0c\u5c06\u51fa\u73b0 OutOfMemoryError\u3002\u8fd9\u4e9b\u5f02\u5e38\u53d1\u751f\u65f6\uff0cJava\u865a\u62df\u673a\uff08JVM\uff09\u4e00\u822c\u4f1a\u9009\u62e9\u7ebf\u7a0b\u7ec8\u6b62\u3002<\/p>\n
\u8fd9\u4e9b\u9519\u8bef\u8868\u793a\u6545\u969c\u53d1\u751f\u4e8e\u865a\u62df\u673a\u81ea\u8eab\u3001\u6216\u8005\u53d1\u751f\u5728\u865a\u62df\u673a\u8bd5\u56fe\u6267\u884c\u5e94\u7528\u65f6\uff0c\u5982Java\u865a\u62df\u673a\u8fd0\u884c\u9519\u8bef\uff08Virtual MachineError\uff09\u3001\u7c7b\u5b9a\u4e49\u9519\u8bef\uff08NoClassDefFoundError\uff09\u7b49\u3002\u8fd9\u4e9b\u9519\u8bef\u662f\u4e0d\u53ef\u67e5\u7684\uff0c\u56e0\u4e3a\u5b83\u4eec\u5728\u5e94\u7528\u7a0b\u5e8f\u7684\u63a7\u5236\u548c\u5904\u7406\u80fd\u529b\u4e4b \u5916\uff0c\u800c\u4e14\u7edd\u5927\u591a\u6570\u662f\u7a0b\u5e8f\u8fd0\u884c\u65f6\u4e0d\u5141\u8bb8\u51fa\u73b0\u7684\u72b6\u51b5\u3002\u5bf9\u4e8e\u8bbe\u8ba1\u5408\u7406\u7684\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\uff0c\u5373\u4f7f\u786e\u5b9e\u53d1\u751f\u4e86\u9519\u8bef\uff0c\u672c\u8d28\u4e0a\u4e5f\u4e0d\u5e94\u8be5\u8bd5\u56fe\u53bb\u5904\u7406\u5b83\u6240\u5f15\u8d77\u7684\u5f02\u5e38\u72b6\u51b5\u3002\u5728 Java\u4e2d\uff0c\u9519\u8bef\u901a\u8fc7Error\u7684\u5b50\u7c7b\u63cf\u8ff0\u3002<\/p>\n
<strong>Exception\uff08\u5f02\u5e38\uff09:\u662f\u7a0b\u5e8f\u672c\u8eab\u53ef\u4ee5\u5904\u7406\u7684\u5f02\u5e38<\/strong>\u3002<\/font>Exception \u7c7b\u6709\u4e00\u4e2a\u91cd\u8981\u7684\u5b50\u7c7b <strong>RuntimeException<\/strong>\u3002RuntimeException \u5f02\u5e38\u7531Java\u865a\u62df\u673a\u629b\u51fa\u3002<strong>NullPointerException<\/strong>\uff08\u8981\u8bbf\u95ee\u7684\u53d8\u91cf\u6ca1\u6709\u5f15\u7528\u4efb\u4f55\u5bf9\u8c61\u65f6\uff0c\u629b\u51fa\u8be5\u5f02\u5e38\uff09\u3001<strong>ArithmeticException<\/strong>\uff08\u7b97\u672f\u8fd0\u7b97\u5f02\u5e38\uff0c\u4e00\u4e2a\u6574\u6570\u9664\u4ee50\u65f6\uff0c\u629b\u51fa\u8be5\u5f02\u5e38\uff09\u548c <strong>ArrayIndexOutOfBoundsException<\/strong> \uff08\u4e0b\u6807\u8d8a\u754c\u5f02\u5e38\uff09\u3002<\/p>\n
<strong>\u6ce8\u610f\uff1a\u5f02\u5e38\u548c\u9519\u8bef\u7684\u533a\u522b\uff1a\u5f02\u5e38\u80fd\u88ab\u7a0b\u5e8f\u672c\u8eab\u5904\u7406\uff0c\u9519\u8bef\u662f\u65e0\u6cd5\u5904\u7406\u3002<\/strong><\/p><\/p>\n
<h3>Throwable\u7c7b\u5e38\u7528\u65b9\u6cd5<\/h3><\/p>\n
<ul><li><strong>public string getMessage()<\/strong>:\u8fd4\u56de\u5f02\u5e38\u53d1\u751f\u65f6\u7684\u7b80\u8981\u63cf\u8ff0<\/li><li><strong>public string toString()<\/strong>:\u8fd4\u56de\u5f02\u5e38\u53d1\u751f\u65f6\u7684\u8be6\u7ec6\u4fe1\u606f<\/li><li><strong>public string getLocalizedMessage()<\/strong>:\u8fd4\u56de\u5f02\u5e38\u5bf9\u8c61\u7684\u672c\u5730\u5316\u4fe1\u606f\u3002\u4f7f\u7528Throwable\u7684\u5b50\u7c7b\u8986\u76d6\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u53ef\u4ee5\u751f\u6210\u672c\u5730\u5316\u4fe1\u606f\u3002\u5982\u679c\u5b50\u7c7b\u6ca1\u6709\u8986\u76d6\u8be5\u65b9\u6cd5\uff0c\u5219\u8be5\u65b9\u6cd5\u8fd4\u56de\u7684\u4fe1\u606f\u4e0egetMessage\uff08\uff09\u8fd4\u56de\u7684\u7ed3\u679c\u76f8\u540c<\/li><li><strong>public void printStackTrace()<\/strong>:\u5728\u63a7\u5236\u53f0\u4e0a\u6253\u5370Throwable\u5bf9\u8c61\u5c01\u88c5\u7684\u5f02\u5e38\u4fe1\u606f<\/li><\/ul><\/p>\n
<h3>\u5f02\u5e38\u5904\u7406\u603b\u7ed3<\/h3><\/p>\n
<ul><li><strong>try \u5757\uff1a<\/strong> \u7528\u4e8e\u6355\u83b7\u5f02\u5e38\u3002\u5176\u540e\u53ef\u63a5\u96f6\u4e2a\u6216\u591a\u4e2acatch\u5757\uff0c\u5982\u679c\u6ca1\u6709catch\u5757\uff0c\u5219\u5fc5\u987b\u8ddf\u4e00\u4e2afinally\u5757\u3002<\/li><li><strong>catch \u5757\uff1a<\/strong> \u7528\u4e8e\u5904\u7406try\u6355\u83b7\u5230\u7684\u5f02\u5e38\u3002<\/li><li><strong>finally \u5757\uff1a<\/strong> \u65e0\u8bba\u662f\u5426\u6355\u83b7\u6216\u5904\u7406\u5f02\u5e38\uff0cfinally\u5757\u91cc\u7684\u8bed\u53e5\u90fd\u4f1a\u88ab\u6267\u884c\u3002\u5f53\u5728try\u5757\u6216catch\u5757\u4e2d\u9047\u5230return\u8bed\u53e5\u65f6\uff0cfinally\u8bed\u53e5\u5757\u5c06\u5728\u65b9\u6cd5\u8fd4\u56de\u4e4b\u524d\u88ab\u6267\u884c\u3002<\/li><\/ul><\/p>\n
<strong>\u5728\u4ee5\u4e0b4\u79cd\u7279\u6b8a\u60c5\u51b5\u4e0b\uff0cfinally\u5757\u4e0d\u4f1a\u88ab\u6267\u884c\uff1a<\/strong><\/p>\n
<ol><li>\u5728finally\u8bed\u53e5\u5757\u7b2c\u4e00\u884c\u53d1\u751f\u4e86\u5f02\u5e38\u3002 \u56e0\u4e3a\u5728\u5176\u4ed6\u884c\uff0cfinally\u5757\u8fd8\u662f\u4f1a\u5f97\u5230\u6267\u884c<\/li><li>\u5728\u524d\u9762\u7684\u4ee3\u7801\u4e2d\u7528\u4e86System.exit(int)\u5df2\u9000\u51fa\u7a0b\u5e8f\u3002 exit\u662f\u5e26\u53c2\u51fd\u6570 \uff1b\u82e5\u8be5\u8bed\u53e5\u5728\u5f02\u5e38\u8bed\u53e5\u4e4b\u540e\uff0cfinally\u4f1a\u6267\u884c<\/li><li>\u7a0b\u5e8f\u6240\u5728\u7684\u7ebf\u7a0b\u6b7b\u4ea1\u3002<\/li><li>\u5173\u95edCPU\u3002<\/li><\/ol><\/p>\n
<strong>\u6ce8\u610f\uff1a<\/strong><\/p>\n
\u5f53try\u8bed\u53e5\u548cfinally\u8bed\u53e5\u4e2d\u90fd\u6709return\u8bed\u53e5\u65f6\uff0c\u5728\u65b9\u6cd5\u8fd4\u56de\u4e4b\u524d\uff0cfinally\u8bed\u53e5\u7684\u5185\u5bb9\u5c06\u88ab\u6267\u884c\uff0c\u5e76\u4e14finally\u8bed\u53e5\u7684\u8fd4\u56de\u503c\u5c06\u4f1a\u8986\u76d6\u539f\u59cb\u7684\u8fd4\u56de\u503c\u3002\u5982\u4e0b\uff1a<\/p>\n
<pre><code>java public static int f(int value) { try { return value * value; } finally { if (value == 2) { return 0; } } }<\/code><\/pre><\/p>\n
\u5982\u679c\u8c03\u7528 <code>f(2)<\/code>\uff0c\u8fd4\u56de\u503c\u5c06\u662f0\uff0c\u56e0\u4e3afinally\u8bed\u53e5\u7684\u8fd4\u56de\u503c\u8986\u76d6\u4e86try\u8bed\u53e5\u5757\u7684\u8fd4\u56de\u503c\u3002<\/p>\n
<pre><code> "“`
\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
“`” <h3> Java\u5f02\u5e38\u7c7b\u5c42\u6b21\u7ed3\u6784\u56fe<\/h3> […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-37364","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=37364"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37364\/revisions"}],"predecessor-version":[{"id":37365,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/37364\/revisions\/37365"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=37364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=37364"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=37364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}