java中 线程已经命名，为什么翻译出来是却是系统自动命名

Question

线程已经命名，为什么翻译出来是却是系统自动命名

```class MyThread implements Runnable{
                private int time;
                private String name;
                public MyThread(String name,int time) {
                this.name = name;
                this.time = time;
                }
                public void run() {
                        try {
                                    Thread.sleep(this.time);
                                    }catch(Exception e) {
                                    e.printStackTrace();
                                    }
                    System.out.println(Thread.currentThread().getName()+ "休眠" + this.time+"毫秒");

        }
    }；
 public class ThreadDemo04{
            public static void main(String args[]) {
            MyThread mt1=new MyThread("线程a",1000);  //此处已命名
            MyThread mt2=new MyThread("线程b",2000);
            MyThread mt3=new MyThread("线程c",3000);
            new Thread(mt1).start();
            new Thread(mt2).start();
            new Thread(mt3).start();

        }
}

Answer 1

System.out.println(Thread.currentThread().getName()+ "休眠" + this.time+"毫秒");
你都知道用this.time,咋不知道用this.name呢？