RunTime的回调钩子

public class TestRunTime {
    static class MyThreadOne extends Thread{
        public void run(){            System.out.println("stop thread one~~~~");        }    }    static class MyThreadTwo extends Thread{
        public void run(){            System.out.println("stop thread two~~~~");        }    }    public static void main(String[] args) {        MyThreadOne myThreadOne=new MyThreadOne();        MyThreadTwo myThreadtwo=new MyThreadTwo();        Runtime.getRuntime().addShutdownHook(myThreadOne);        Runtime.getRuntime().addShutdownHook(myThreadtwo);    }}