本书共分20章，第1-4章解释了java虚拟机的体系结构，包括java栈、堆、方法区、执行引擎等；第5-20章深入描述了java技术的内部细节，包括垃圾收集、java安全模型、java的连接模型和动态扩展机制、class文件、运算及流程控制等等，其中等6章和附录a-c完全可以作为class文件和指令含集的参考手册深入JAVA虚拟机第二版-This book is divided into 20 chapters, chapters 1-4 explain the java virtual machine architecture, including the java stack, heap, methods area, the execution engine　5-20 chapter in-depth descr iption of the internal details of the java technology, including garbagecollection, the Java security model, Java connection model and the dynamic extension mechanism, the class file, computing and process control, etc., of which 6 and Appendix ac can be used as the class files and instruction set reference manual containing