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。。。