public static void main(Stringl[] args){

System.out.println("开始:");

MyThread x=new MyThread(1000,"girl");

MyThread y=new MyThread(300, "boy");

x.start();  y.start();

while(x.isAlive()||y.isAlive0());

System.out.println("结束");

}}class MyThread extends Thread{

int dt;

String name;

public MyThread(int c,String n){

dt=c;        name =n;      }

public void run(){

MyResourceClass.outMsg(this);      }}class MyResourceClass{

synchronized static void outMsg(MyThread th){

System.out.println(th.name+"  "+"启动.");

for(int i=0;i<2;i++){

System.out.println(th.name+"  第"+i+ 次活动.");

try{

Thread.sleep(th.dt);

}catch(InterruptedException e){}          }

System.out.println(th.name+"  "+"活动完成.");     }} 

阅读下列程序,请写出该程序的输出结果。