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string table底层是hashtable，是采用数组加链表的形式存储数据，可以看到存储字符串的桶的数量为60013个，字符串的数量为26231个。我们实际上创建的字符串个数是10 0000个，为什么打印出来的数量不符合呢？根据打印信息，原来是因为触发了GC操作。7.7 String tabl...

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在jvm启动时，常量池中的内容都会加载到运行时常量池中，但是此时a，b，ab都还只是一个符号，而不是字符串对象。只有当执行到具体的指令，如0: ldc #2才会创建字符串对象"a"。于此同时，jvm还会去String table[]中去找是否有"a"这个字符串...

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7.方法区7.1 定义方法区是java虚拟机中所有线程共享的共享区域，主要存放类的结构相关信息(成员变量，方法、构造器的代码)，运行时常量池,类加载器。方法区在虚拟机启动时被创建，在逻辑上属于堆的组成部分(具体产商实现时不一定遵守逻辑上的划分标准)。在jdk1.8以前，方法区位于jvm的永久代，字符...

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