4月12日，TestMyThread，每日20行。

class MyThread extends Thread {    public void run(){        while(true){            System.out.println(Thread.currentThread().getName() + " is running");        }    }}public class TestMyThread {    public static void main(String[] args) {        new MyThread().run();//new MyThread().start();        while(true){            System.out.println("main1 thread is running");        }    }}