Virtual machine technology is a technology to parse code bytecode easy running on different devices, virtual machine English name: virtual machine, it is referred to as the Java Virtual Machine JVM. In the process of development of a virtual machine, there have been many virtual machine, which parses Java virtual machine has a lot, and now the official use virtual machine is called HotSpot virtual machine, here we mainly have to introduce this virtual machine.
Virtual machine includes the following components: a program counter, java virtual machine stack, native method stacks, Java heap, the method area. (Note that the java virtual machine Hotspot native method stacks and stacks and the second one a)
