Java每日一题20170327

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package Mar2017;

public class Ques0327 {

    public static void main(String[] args) {
        MyThread t1 = new MyThread("t1");
        MyThread t2 = new MyThread("t2");
        t1.start();
        t2.start();
    }

}

class MyThread extends Thread {
    public void output(String s) {
        System.out.println(s);
    }

    public void run() {
        for (int i = 0; i < 10; ++i) {
            try {
                sleep((long)(3000*Math.random()));
            } catch (Exception e) {
                // TODO: handle exception
            }
            output(getName());
        }
    }
    
    public MyThread(String s) {
        super(s);
    }
}

今日问题：
请问主程序运行结果是什么？