main入口方法中创建线程执行顺序的问题

 1     public static void main(String args[]) {
 2 
 3         
 4         Thread t1=new Thread(){
 5             public void run(){
 6                 System.out.println("1");
 7             }
 8         };
 9         Thread t2=new Thread(){
10             public void run(){
11                 System.out.println("2");
12             }
13         };
14         t1.run();
15         t2.start();
16         
17         System.out.println("3");
18         
19 
20         
21         
22     }