关于synchronized锁失效的问题

Question

题目描述 我用synchronized锁住循环语句，如果循环次数低于400次就能够锁住，如果大于400就锁不住了，请问这是什么原因？ 相关代码 private void createThread(){ thread1=new Thread1(); thread2=new Thread1(); thread1.start(); thread2.start(); } class Thread1 extends Thread{ @Override public synchronized void run() { super.run(); for(int i=0;i<500;i++){ MainTool.log(Thread.currentThread().getName()+":"+i); } } } 错误展示 ..... Thread-1:57 Thread-1:58 Thread-1:59 Thread-1:60 Thread-1:61 Thread-1:62 Thread-1:63 Thread-1:64 Thread-1:65 Thread-1:66 Thread-1:67 Thread-1:68 Thread-1:69 Thread-1:70 Thread-1:71 Thread-1:72 Thread-1:73 Thread-1:74 Thread-1:75 Thread-1:76 Thread-1:77 Thread-1:78 Thread-1:79 Thread-1:80 Thread-1:81 Thread-1:82 Thread-1:83 Thread-1:84 Thread-1:85 Thread-1:86 Thread-1:87 Thread-1:88 Thread-1:89 Thread-1:90 Thread-1:91 Thread-1:92 Thread-1:93 Thread-1:94 Thread-1:95 Thread-1:96 Thread-1:97 Thread-1:98 Thread-1:99 Thread-0:72 Thread-0:73 Thread-0:74 Thread-0:75 Thread-0:76 Thread-0:77 Thread-0:78 Thread-0:79 Thread-0:80 Thread-0:81 Thread-0:82 Thread-0:83 Thread-0:84 Thread-0:85 Thread-0:86 Thread-0:87 Thread-0:88 Thread-0:89 Thread-0:90 Thread-0:91 Thread-0:92 Thread-0:93 Thread-0:94 Thread-0:95 Thread-0:96 Thread-0:97 Thread-0:98 Thread-0:99 Thread-0:100 Thread-0:101 Thread-0:102 Thread-0:103 Thread-0:104 Thread-0:105 Thread-0:106 Thread-0:107 Thread-0:108 Thread-0:109 Thread-0:110 Thread-0:111 Thread-0:112 Thread-0:113 Thread-0:123 Thread-1:109 Thread-0:124 Thread-1:110 Thread-0:125 Thread-1:111 Thread-0:126 Thread-1:112 Thread-0:127 Thread-1:113 Thread-0:128 Thread-0:136 Thread-0:137 Thread-0:138 Thread-0:139 Thread-0:140 Thread-0:141 Thread-0:142 Thread-0:143 Thread-0:144 Thread-1:114 Thread-0:178 Thread-1:121 Thread-0:186 Thread-1:122 Thread-0:187 Thread-1:123 Thread-0:188 Thread-1:124 Thread-1:125 Thread-1:126 Thread-1:127 Thread-1:128 Thread-1:129 Thread-1:130 Thread-1:131 Thread-1:132 Thread-1:133 Thread-1:134 Thread-1:135 Thread-1:136 Thread-1:137 Thread-1:138 Thread-1:139 Thread-1:140 Thread-1:141 Thread-1:142 Thread-1:143 Thread-1:144 Thread-1:145 Thread-1:146 Thread-1:147 Thread-1:148 Thread-1:149 Thread-1:150 Thread-1:151 Thread-1:152 Thread-1:153 Thread-1:154 Thread-1:155 Thread-1:156 Thread-1:157 Thread-1:158 Thread-1:159 Thread-1:160 Thread-1:161 Thread-1:162 Thread-1:163 Thread-1:164 Thread-1:165 Thread-1:166 Thread-1:167 Thread-1:168 Thread-1:169 Thread-1:170 Thread-1:171 Thread-1:172 Thread-1:173 Thread-1:174 Thread-1:175 Thread-1:176 Thread-1:177 Thread-1:178 Thread-1:179 Thread-1:180 Thread-1:181 Thread-0:189 Thread-1:182 Thread-1:183 Thread-1:184 Thread-1:185 Thread-1:186 Thread-0:190 Thread-1:187 Thread-0:191 Thread-1:188 Thread-0:192 Thread-1:189 Thread-0:193 Thread-1:190 Thread-0:194 Thread-1:191 Thread-0:195 Thread-1:192 Thread-0:196 Thread-1:193 Thread-0:197 Thread-1:194 Thread-0:198 Thread-1:195 Thread-0:199 Thread-1:196 Thread-0:200 Thread-1:197 Thread-0:201 Thread-1:198 Thread-0:202 Thread-1:199 Thread-0:203 Thread-1:200 Thread-0:204 Thread-1:201 Thread-0:205 Thread-1:202 Thread-0:206 Thread-1:203 Thread-0:207 Thread-1:204 Thread-0:208 .....

Answer 1

我没发现结果中有错误，你觉得输出哪里有错误？