java多线程执行问题

class Demo extends Thread{
    public Demo(String name){
	    super(name);
	}

	public void run(){
	    for(int i=0; i<6; ++i){
		    System.out.println("i = " + i + "......Thread=" + Thread.currentThread().getName());
			try{
			    Thread.sleep(100);
			}catch(InterruptedException e){
			    System.out.println("进程被打断！");
			}
	    }
	}
}

public class Test{
   public static void main(String[] args) throws InterruptedException{

	    Demo d1 = new Demo("hjz");
		Demo d2 = new Demo("chb");
		d1.start();
		//另外当某一个线程因为异常而终止，其他的线程照样执行，不会受到任何影响！
		System.out.println(5/0);//throw new ArithmeticException()
		for(int i=0; i<6; ++i){
		    System.out.println("i = " + i + "......Thread=" + Thread.currentThread().getName());
			Thread.sleep(200);
		}

		d2.start();//如果开启新线程之前，就因为异常而中止了线程，那么新线程将无法开启！
   }
}

/*
 class Demo extends Thread{
    public Demo(String name){
	    super(name);
	}
	//public Thread(String name) {
    //    init(null, null, name, 0);
    //} 也就是在创建线程对象的时候，通过构造函数该线程就有了名字了！
	public void run(){
	    for(int i=0; i<6; ++i){
		    System.out.println("i = " + i + "......Thread=" + getName());
			try{
			    Thread.sleep(100);
			}catch(InterruptedException e){
			    System.out.println("进程被打断！");
			}
	    }
	}
}

public class Test{
   public static void main(String[] args) throws InterruptedException{
	    Demo d1 = new Demo("hjz");
		Demo d2 = new Demo("chb");

		d1.run();
		d2.run();
   }
}
 */