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();   
   }
}
 */