{"id":322236,"date":"2021-02-06T12:21:22","date_gmt":"2021-02-06T04:21:22","guid":{"rendered":"http:\/\/4563.org\/?p=322236"},"modified":"2021-02-06T12:21:22","modified_gmt":"2021-02-06T04:21:22","slug":"%e8%b0%81%e5%90%83%e6%8e%89%e4%ba%86-java-%e5%bc%82%e5%b8%b8%e7%9a%84%e4%bb%a3%e7%a0%81%e6%a0%88","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=322236","title":{"rendered":"\u8c01\u5403\u6389\u4e86 Java \u5f02\u5e38\u7684\u4ee3\u7801\u6808?"},"content":{"rendered":"
\n
\n
\n

\u8c01\u5403\u6389\u4e86 Java \u5f02\u5e38\u7684\u4ee3\u7801\u6808? <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : manecocomph <\/span> <\/i> 1<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\u8f6c\u81ea: https:\/\/mp.weixin.qq.com\/s\/GUFvhOtJMg4tAdMVDWI8bA<\/p>\n

\u901a\u5e38\u60c5\u51b5\u4e0b, \u5982\u679c\u6211\u4eec\u9047\u5230\u67d0\u4e9b\u5f02\u5e38, \u90fd\u628a\u51fa\u9519\u5f02\u5e38\u6808\u6253\u51fa\u6765, \u8fd9\u6837\u65b9\u4fbf\u67e5\u770b\u5230\u5e95\u54ea\u884c\u4ee3\u7801\u51fa\u9519\u4e86, \u662f\u600e\u4e48\u4e00\u5c42\u5c42\u8c03\u7528\u5230\u4e86\u8fd9\u884c\u4ee3\u7801. \u53ef\u662f\u6709\u65f6\u5019, \u867d\u7136\u6211\u4eec\u660e\u786e\u5199\u4e86\u6253\u5370\u51fa\u9519\u5f02\u5e38\u6808, \u53ef\u662f\u504f\u504f\u65e5\u5fd7\u91cc\u9762\u5374\u6ca1\u6709\u51fa\u9519\u6808, \u8fd9\u662f\u600e\u4e48\u4e00\u56de\u4e8b\u5462? <\/p>\n

\u6545\u4e8b\u80cc\u666f<\/p>\n

\u67d0\u5929, \u6709\u5f00\u53d1\u4eba\u5458\u627e\u5230 SRE \u8bf4, \u4ed6\u4eec\u7684\u4ee3\u7801\u51fa\u4e86\u4e00\u4e2a\u65b0\u7684\u7a7a\u6307\u9488\u9519\u8bef, \u53ef\u662f\u65e5\u5fd7\u91cc\u9762\u5374\u6ca1\u6709\u51fa\u9519\u6808, \u60f3\u8ba9 SRE \u5e2e\u5fd9\u786e\u5b9a\u4e00\u4e0b, \u5230\u5e95\u662f\u65e5\u5fd7\u4e22\u4e86, \u8fd8\u662f\u4ee3\u7801\u54ea\u91cc\u51fa\u4e86\u95ee\u9898.<\/p>\n

SRE \u67e5\u770b\u4e86\u6e90\u4ee3\u7801, \u4ee3\u7801\u786e\u5b9e\u662f\u6253\u5370\u5b8c\u6574\u51fa\u9519\u6808, \u53ef\u662f\u65e5\u5fd7\u5374\u6ca1\u6709\u76f8\u5173\u4fe1\u606f. \u4e8e\u662f SRE \u60f3\u4f7f\u7528 BTrace \u66b4\u529b\u6ce8\u5165, \u67e5\u770b\u5230\u5e95\u600e\u4e48\u56de\u4e8b. \u53ef\u662f\u4e8b\u4e0e\u613f\u8fdd, \u8fd9\u4e9b\u51fa\u9519\u7684\u673a\u5668, \u7531\u4e8e\u672a\u77e5\u7684\u539f\u56e0, SRE \u7684\u8d26\u53f7\u767b\u5f55\u4e0d\u4e86. \u6240\u4ee5\u53ea\u80fd\u901a\u8fc7\u5176\u5b83\u65b9\u5f0f\u53bb\u89e3\u51b3\u8fd9\u4e2a\u8c1c\u9898. <\/p>\n

\u4ee3\u7801\u6a21\u62df<\/p>\n

\u4e3a\u4e86\u8f83\u4e3a\u76f4\u89c2\u7684\u5c55\u793a\u8fd9\u4e2a\u95ee\u9898, \u8003\u8651\u4e0b\u9762\u8fd9\u6bb5\u4ee3\u7801, \u5b83\u6700\u540e\u6253\u5370\u51fa\u6765\u7684\u7ed3\u679c\u4f1a\u662f\u4ec0\u4e48\u6837\u5b50?<\/p>\n

package com.tianxiaohui.art;<\/p>\n

public class StackEater {<\/p>\n

public static void main(String[] args) {<\/p>\n

StackEater.makeException();<\/p>\n

}<\/p>\n

public static void makeException() {<\/p>\n

\/\/\u5faa\u73af N \u6b21, \u53ea\u4e3a\u6bcf\u6b21\u90fd\u53d1\u751f\u7a7a\u6307\u9488\u5f02\u5e38 <\/p>\n

for (int i = 0; i < 1000000000; i++) {<\/p>\n

try {<\/p>\n

Object obj = createObject();<\/p>\n

System.out.println(obj.hashCode());<\/p>\n

} catch (Exception e) {\/\/\u6253\u5370\u51fa\u9519\u6808<\/p>\n

e.printStackTrace();<\/p>\n

}<\/p>\n

}<\/p>\n

}<\/p>\n

public static Object createObject() {<\/p>\n

returnnull;\/\/\u4e3a\u4e86\u521b\u9020\u7a7a\u6307\u9488\u5f02\u5e38, \u8fd4\u56de\u4e00\u4e2a\u7a7a\u5bf9\u8c61, <\/p>\n

}<\/p>\n

}<\/p>\n

\u6700\u5f00\u59cb\u7684\u65f6\u5019, \u4e8b\u60c5\u8fd8\u662f\u5728\u6211\u4eec\u9884\u6599\u4e4b\u4e2d:<\/p>\n

\u56fe\u7247<\/p>\n

\u53ef\u662f\u968f\u7740\u5faa\u73af\u6b21\u6570\u589e\u52a0, \u6700\u540e\u6253\u5370\u7684\u7ed3\u679c, \u53d8\u6210\u4e86\u8fd9\u4e2a\u6837\u5b50: <\/p>\n

java.lang.NullPointerException<\/p>\n

java.lang.NullPointerException<\/p>\n

java.lang.NullPointerException<\/p>\n

\u8c1c\u9898\u7b54\u6848<\/p>\n

\u5728\u8bb2\u51fa\u7b54\u6848\u4e4b\u524d, \u6211\u4eec\u5148\u590d\u4e60\u4e00\u4e0b JIT \u4f18\u5316\u7684\u4e00\u4e9b\u7ec6\u8282: \u5f53\u67d0\u4e9b Java \u65b9\u6cd5\u6216\u8005\u67d0\u4e9b\u5faa\u73af\u4f53\u91cc\u9762\u7684\u4ee3\u7801, \u5728\u67d0\u4e2a\u6ed1\u52a8\u65f6\u95f4\u7a97\u53e3\u4e4b\u5185\u6267\u884c\u7684\u6b21\u6570\u8db3\u591f\u591a, \u8db3\u591f hot \u7684\u65f6\u5019, JIT \u5c31\u51fa\u624b\u628a\u4ed6\u4eec\u7f16\u8bd1\u6210\u673a\u5668\u4ee3\u7801\u4e86. \u7f16\u8bd1\u7684\u673a\u5668\u4ee3\u7801\u6839\u636e\u4f18\u5316\u5c42\u5ea6\u4e0d\u540c, \u53c8\u5206\u4e3a\u51e0\u4e2a\u7b49\u7ea7. \u4ee3\u7801\u8d8a\u70ed, \u4f18\u5316\u5c42\u5ea6\u8d8a\u9ad8. <\/p>\n

\u53e6\u5916, \u5728 Java \u8fd0\u884c\u8fc7\u7a0b\u4e2d, \u5982\u679c\u51fa\u9519\u4ea7\u751f\u5f02\u5e38, \u4e00\u822c\u90fd\u662f\u628a\u5f02\u5e38\u6808\u4fe1\u606f\u5c01\u88c5\u5728 Throwable \u6216\u5176\u5b50\u7c7b\u4e2d. \u91c7\u96c6\u5f53\u524d\u7ebf\u7a0b\u7684\u5f02\u5e38\u6808\u5bf9\u4e8e JVM \u6765\u8bf4, \u662f\u4e00\u4e2a\u76f8\u5bf9\u8017\u65f6\u7684\u64cd\u4f5c, \u9700\u8981\u989d\u5916\u8017\u8d39\u6bd4\u8f83\u591a\u7684 CPU cycle. <\/p>\n

\u9488\u5bf9 JDK \u81ea\u5e26\u7684\u4e00\u4e9b\u5f02\u5e38\u7c7b, \u5982\u679c JIT \u505a\u4ee3\u7801\u7f16\u8bd1\u7684\u65f6\u5019, \u4f1a\u6709\u66f4\u8d34\u5fc3\u7684\u4f18\u5316\u7b56\u7565: \u51fa\u4e8e\u6027\u80fd\u8003\u8651, \u628a\u51fa\u9519\u6808\u4fe1\u606f\u7701\u7565\u6389, \u53ea\u4fdd\u7559\u5f02\u5e38\u7c7b\u7684\u7c7b\u540d. \u540c\u65f6, \u63d0\u4f9b\u4e86\u4e00\u4e2a JVM flag: -XX:+OmitStackTraceInFastThrow \u6765\u9009\u62e9\u6253\u5f00, \u8fd8\u662f\u5173\u95ed\u8fd9\u4e2a\u8d34\u5fc3\u4f18\u5316. \u9ed8\u8ba4\u662f\u6253\u5f00\u7684. <\/p>\n

\u6240\u4ee5, \u6211\u4eec\u7684\u6545\u4e8b\u5f53\u4e2d, \u5c31\u662f\u56e0\u4e3a\u90a3\u4e2a JDK \u81ea\u5e26\u5f02\u5e38\u51fa\u9519\u7684\u9891\u7387\u592a\u9ad8, \u5bfc\u81f4 JIT \u5bf9\u5b83\u8fdb\u884c\u4e86\u4f18\u5316, \u6700\u7ec8\u5728\u540e\u9762\u7684\u65e5\u5fd7\u4e2d\u770b\u4e0d\u5230\u90a3\u4e2a\u5f02\u5e38\u6808. \u4e3a\u4e86\u770b\u5230\u90a3\u4e2a\u5f02\u5e38\u6808, \u8981\u8dd1\u5230\u6700\u5f00\u59cb\u51fa\u9519\u7684\u65f6\u95f4\u70b9\u53bb\u67e5\u770b\u65e5\u5fd7. <\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (23<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : 340244120w <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5c45\u7136\u6700\u540e\u6ca1\u6709\u516c\u4f17\u53f7\u94fe\u63a5\uff01
    \u4e0d\u8fc7\u8bf4\u56de\u6765\uff0c\u6211\u4eec\u4e3a\u4e86\u51cf\u5c11\u5f02\u5e38\u6808\u8f93\u51fa\uff0c\u81ea\u5b9a\u4e49\u4e1a\u52a1\u7c7b\u5f02\u5e38\u7c7b\u90fd\u662f
    @Override
    public Throwable fillInStackTrace() {
    return null;
    } <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : sadfQED2 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u5c31\u662f\u6211\u4e0d\u6562\u53bb\u5199 java \u7684\u539f\u56e0\uff0cjvm \u5404\u79cd\u5947\u5947\u602a\u602a\u7684\u4f18\u5316\u592a\u591a\u4e86\u3002\u8fd9\u7279\u4e48\u8c01\u80fd\u60f3\u5230\u554a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : tedzhou1221 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7c7b\u4f3c\u60c5\u51b5\uff0c\u5728\u6211\u4eec\u751f\u4ea7\u6709\u53d1\u751f\u8fc7\u3002<\/p>\n

    \u516c\u5171\u65b9\u6cd5\uff0c\u7a7a\u6307\u9488\u3002 \u4e00\u5806\u62a5\u9519\u65e5\u5fd7\u53d1\u5230\u8fd0\u7ef4\u90ae\u7bb1\u3002\u5185\u5bb9\u5c31\u4e00\u884c \u5c31\u663e\u793a\u7a7a\u6307\u9488\uff0c\u4e5f\u6ca1\u663e\u793a\u54ea\u4e00\u884c\u51fa\u95ee\u9898\u2026\u2026 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : manecocomph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @340244120w \u54c8\u54c8, \u539f\u6587\u91cc\u9762\u6709, \u6700\u540e\u5c31\u4e0d\u653e\u4e86. \u8c22\u8c22\u6367\u573a. \u4f60\u8fd9\u4e2a\u8fd4\u56de null \u7684\u6211\u8fd8\u662f\u7b2c\u4e00\u6b21\u89c1. \u6da8\u89c1\u8bc6. <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : manecocomph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @sadfQED2 JIT \u7f16\u8bd1\u65f6\u4f1a\u6709\u5404\u79cd\u4f18\u5316. \u5927\u591a\u6570\u4e0d\u4f1a\u4ea7\u751f\u8fd9\u79cd\u5f02\u5e38. <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : manecocomph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @tedzhou1221 \u90a3\u57fa\u672c\u5c31\u662f\u8fd9\u4e2a\u95ee\u9898. \u6240\u4ee5\u8981\u627e\u5230\u6700\u521d\u62a5\u8fd9\u4e2a\u7a7a\u6307\u9488\u7684\u5730\u65b9. \u6216\u8005\u4f7f\u7528 BTrace \u68c0\u6d4b new NPEException \u7684\u70b9, \u6253\u5370 stack. <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : cheng6563 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u79cd\u4e00\u822c\u627e\u5230\u7b2c\u4e00\u4e2a\u5f02\u5e38\u5c31\u884c\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : manecocomph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @cheng6563 \u662f\u7684. \u5982\u679c\u7b2c\u4e00\u4e2a\u5f02\u5e38\u592a\u4e45\u4e86\u6216\u8005\u65e5\u5fd7\u88ab rotate \u4e86 \u7b2c\u4e00\u4e2a\u65e5\u5fd7\u5c31\u6bd4\u8f83\u96be\u627e. <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : timi <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5982\u679c\u65e5\u5fd7\u6eda\u6ca1\u4e86\uff0c\u6709\u529e\u6cd5\u8ba9 JVM \u9006\u4f18\u5316\u56de\u53bb\u5417 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : manecocomph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @timi \u4e00\u6bb5\u65f6\u95f4\u5185\u8fd9\u4e2a\u65b9\u6cd5\u6216\u8005 for \u5faa\u73af\u4f53\u5185\u7684\u65b9\u6cd5\u4e0d\u518d\u8fc7\u70ed. \u5b83\u662f\u8ba1\u7b97\u4e00\u4e2a\u6ed1\u52a8\u65f6\u95f4\u7a97\u53e3\u5185\u88ab\u6267\u884c\u7684\u6b21\u6570. \u5982\u679c\u6b21\u6570\u964d\u4e0b\u6765 \u56e0\u4e3a\u5b58\u7f16\u8bd1\u4ee3\u7801\u7684\u7a7a\u95f4\u6709\u9650, \u8fd9\u6bb5\u4ee3\u7801\u53ef\u80fd\u4f1a\u88ab\u9006\u4f18\u5316. <\/p>\n

    \u5f53\u7136, \u5982\u679c\u91cd\u542f server, \u81ea\u7136\u53c8\u6062\u590d\u5230\u5f00\u59cb\u72b6\u6001\u4e86. <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : justlikemaki <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7ebf\u4e0a\u9047\u5230\u8fc7\u8fd9\u79cd\u95ee\u9898\uff0cxx \u540c\u4e8b\u8bf4\uff0c\u52a0\u4e86\u4e2a\u65e5\u5fd7\u4fee\u590d\u4e86\u3002\u5176\u5b9e\u662f\uff0c\u91cd\u542f\u4e86\u5c31\u6062\u590d\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : manecocomph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @justlikemaki \u54c8\u54c8, \u90a3\u662f\u4e0d\u662f\u8fc7\u6bb5\u65f6\u95f4\u53c8\u91cd\u73b0\u4e86. xx \u540c\u4e8b\u5728\u53bb\u6389\u65e5\u5fd7\u53c8\u53ef\u4ee5\u4fee\u590d\u4e00\u6b21… <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xuanbg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @timi \u4e0d\u9700\u8981\u6eda\u56de\u53bb\uff0c\u91cd\u542f\u5c31\u6709\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : beichenhpy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6392\u7248\u96be\u53d7 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hustmisa <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u4e0d\u662f\u5f88\u6b63\u5e38\u4e14\u7b26\u5408\u903b\u8f91\u7684\u4f18\u5316\u4e48<\/p>\n

    \u5982\u679c\u76f8\u540c\u7684\u5f02\u5e38\u5806\u6808\u7279\u522b\u591a\uff0c\u7c7b\u4f3c\u4f60\u8fd9\u79cd\u5faa\u73af 100000\uff0c\u5f02\u5e38\u7684\u5806\u6808\u4f1a\u589e\u52a0 io \u751a\u81f3\u5199\u6ee1\u78c1\u76d8\uff0c\u8fd9\u65f6\u5019\u4f60\u91cd\u542f\u6216\u8005\u627e\u5230\u9519\u8bef\u5f00\u59cb\u7684\u4f4d\u7f6e\u5c31\u80fd\u770b\u5230\u5806\u6808\uff0c\u800c\u4e14\u4e00\u4e2a\u5b8c\u5168\u91cd\u590d\u65e0\u6570\u6b21\u7684\u4e1c\u897f\u8bb0\u5f55\u5e72\u561b\uff0c\u4f60\u4e1a\u52a1\u65e5\u5fd7\u4f1a\u8bb0\u5f55\u5b8c\u5168\u91cd\u590d\u6ca1\u7528\u7684\u4e1c\u897f\u4e48\uff1b
    \u5982\u679c\u76f8\u540c\u7684\u9519\u8bef\u5f88\u5c11\uff0c\u6839\u672c\u4e0d\u4f1a\u88ab\u7701\u7565\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : manecocomph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @hustmisa \u662f\u6b63\u5e38\u4e14\u7b26\u5408\u903b\u8f91\u7684\u4f18\u5316. \u53ea\u662f\u5f88\u5c11\u770b\u5230\u8fd9\u79cd\u6587\u6863\u4ecb\u7ecd\u8fd9\u79cd\u77e5\u8bc6, \u5bfc\u81f4\u7b2c\u4e00\u6b21\u89c1\u5230\u8fd9\u79cd\u60c5\u5f62, \u4e0d\u77e5\u9053\u6808\u53bb\u54ea\u91cc\u4e86. <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : manecocomph <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @beichenhpy \u662f\u7684, \u6211\u4e3a\u4e86\u7701\u4e8b, \u76f4\u63a5\u590d\u5236\u8fc7\u6765\u4e86. \u76f4\u63a5\u8bfb\u5fae\u4fe1\u539f\u6587\u6392\u7248\u4f1a\u597d\u70b9. \u4e0b\u6b21\u5199\u4e2a\u63d0\u793a. <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : MineDog <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @340244120w #1 \u6784\u9020\u65b9\u6cd5\u53ef\u4ee5\u76f4\u63a5\u5173\u95ed\uff0c\u4e3a\u4ec0\u4e48\u8981\u91cd\u5199\u5462\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : 340244120w <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @MineDog <\/p>\n

    \u4e00\u4e2a\u662f\u9632\u6b62\u5176\u4ed6\u4eba\u6ee5\u7528 e.printstacktrace \u3002<\/p>\n

    \u4e00\u4e2a\u662f\u6027\u80fd\u95ee\u9898\uff0c\u586b\u5145\u6808\u7279\u522b\u5403\u6027\u80fd\uff0c\u800c\u4e14\u8fd8\u662f\u52a0\u9501\u7684\u65b9\u6cd5\u3002\u5f88\u591a\u4eba\u8bdf\u75c5\u7528\u5f02\u5e38\u4ee3\u66ff\u4e1a\u52a1\u91cc\u7684 if \u5224\u65ad\u5f71\u54cd\u6027\u80fd\uff0c\u5c31\u662f\u8fd9\u4e2a\u539f\u56e0\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : 340244120w <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @MineDog \u91cd\u5199\u66f4\u7b80\u5355\uff0c\u6784\u9020\u65b9\u6cd5\u4e5f\u633a\u597d\uff0c\u4e3b\u8981\u5f53\u65f6\u4e5f\u6ca1\u6ce8\u610f\u5230 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : MineDog <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @340244120w #20 \u53c2\u6570\u63a7\u5236\u7684\u65b9\u5f0f\u66f4\u7075\u6d3b\u5427 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : 340244120w <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @MineDog #21 \u55ef\u55ef <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hustmisa <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @manecocomph \u55ef\u55ef\u786e\u5b9e\u662f\uff0c\u8fd9\u4e2a\u4f18\u5316\u7684\u5f88\u9690\u853d\u3002\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    \u8c01\u5403\u6389\u4e86 Java \u5f02\u5e38\u7684\u4ee3\u7801\u6808?…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/322236"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=322236"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/322236\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=322236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=322236"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=322236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}