一起找bug

帮同学找的一个bug，错误代码如下：

 package dai_test;
 public class Test1 {

     public static void main(String[] args) {
         // TODO Auto-generated method stub
         MyThread myThread = new MyThread();
         myThread.setName("dai");
         myThread.start();
     }
     class MyThread extends Thread{
         public void run() {
             super.run();
              for(int i =0;i<10;i++){
                  System.out.println(  "Main.run()"+i+Thread.currentThread().getName()   );
           }
         }
     }
 }

错误信息为第6行：No enclosing instance of type Test1 is accessible. Must qualify the allocation with an enclosing instance of type Test1 (e.g. x.new
 A() where x is an instance of Test1).

错误原因：将class MyThread写到了Class Text1里面。。。