Thread.currentThread().getName() 和 this.getName()区别详解

public class MyThread extends Thread {
    public MyThread(){
        System.out.println("---MyThread  begin---");
        System.out.println("Thread.currentThread.getName()=" +Thread.currentThread().getName());
        System.out.println("this.getName()=" + this.getName());
        System.out.println(Thread.currentThread() == this);
        System.out.println("---MyThread  begin---");
    }
    @Override
    public void run(){
        System.out.println("---run  begin---");
        System.out.println("Thread.currentThread.getName()=" +Thread.currentThread().getName());
        System.out.println("this.getName()=" +this.getName());
        System.out.println(Thread.currentThread() == this);
        System.out.println("---run end ---");
    }
 
    public static void main(String[] args) throws InterruptedException {
        MyThread tt = new MyThread();
        Thread t1 = new Thread(tt);
        t1.setName("test");
        t1.start();
    }
}

---MyThread  begin---
Thread.currentThread.getName()=main  //实体是指现在正在发生的线程：main线程
this.getName()=Thread-0              //实例：当前实例是“死的线程”，默认赋值是：Thread-0
false                                //    实体并不是实例
---MyThread  begin---

---run  begin---
Thread.currentThread.getName()=test //实体是指现在正在发生的线程：test线程
this.getName()=Thread-0             //实例：当前实例是“死的线程”，默认赋值是：Thread-0 
false                              //当前的实体是：test 并不是，tt这个对象的死线程
---run end ---

public static void main(String[] args) throws InterruptedException {
        MyThread tt = new MyThread();
        tt.setName("test");
        tt.start();
    }

---MyThread  begin---
Thread.currentThread.getName()=main
this.getName()=Thread-0
false
---MyThread  begin---
---run  begin---
Thread.currentThread.getName()=test
this.getName()=test
true
---run end ---