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Java对象创建、分配、布局、访问小析(HotSpot虚拟机)(二)

本文内容总结自周志明先生所编著的《深入理解Java虚拟机-JVM高级特性与最佳实践》此书的经典不必多说。本节内容是对象的内存布局。在HotSpot虚拟机中，对象在内存中存储的布局可以分为3块区域：对象头、实例数据、对齐填充(Padding)。在32位虚拟机中对象头的大小是8个字节，在64位虚拟机中...

Java对象创建、分配、布局、访问小析(HotSpot虚拟机)(一)

本文内容总结自周志明先生所编著的《深入理解Java虚拟机-JVM高级特性与最佳实践》此书的经典不必多说。本节内容是对象的创建.、分配的内容。对象的创建 java对象的创建有几种方式呢（这里所说的java对象仅限于普通java对象不包含数据和Class对象）？大致有以下四种方式： new关键字。这应...

Java 虚拟机原理

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《HotSpot实战》—— 1.2 动手编译虚拟机

本节书摘来异步社区《HotSpot实战》一书中的第1章，第1.2节，作者：陈涛，更多章节内容可以访问云栖社区“异步社区”公众号查看。 1.2　动手编译虚拟机源码面前，了无秘密。对于OpenJDK和HotSpot项目来说也是如此。因此，研究虚拟机实现机制的最佳途径就是阅读和调试源代码。我们希望能够动...

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