JVM（二） java虚拟机与程序的生命周期

Java虚拟机将结束生命周期的情况：

1、执行了System.exit()方法

可以看看其官方文档是怎么说的:

• exit

  public static void exit(int status)

  Terminates the currently running Java Virtual Machine. The argument serves as a status code; by convention, a nonzero status code indicates abnormal termination.

  This method calls the exit method in classRuntime. This method never returns normally.

  The call System.exit(n) is effectively equivalent to the call:

   Runtime.getRuntime().exit(n) 

  Parameters:

  status - exit status.

  Throws:

  SecurityException - if a security manager exists and itscheckExit method doesn't allow exit with the specified status.

  See Also:

  Runtime.exit(int)

2、程序正常执行结束

3、程序在执行过程中遇到了异常或错误而异常终止

比如你程序没有在最上面一层进行try,catch。那么错误就会上抛到java虚拟机中导致结束。

4、由于操作系统出现错误而导致Java虚拟机进程终止