Thread.currentThread()和this的区别

package threadTest;

 

public class CountOperate extends Thread{

    public CountOperate(){

       //CountOperate类初始化时，main线程在执行中，是alive的；this代表新建的thread对象，线程未启动非alive

       System.out.println("CountOperate -- begin");

       System.out.println("Thread.currentThread().getName()= " + Thread.currentThread().getName());

       System.out.println("Thread.currentThread().isAlive()= " + Thread.currentThread().isAlive());

       System.out.println("this.getName()= " + this.getName());

       System.out.println("this.isAlive()= " + this.isAlive());

       System.out.println("CountOperate -- end ");

    }

    @Override

    public void run(){

       //当前正在执行的线程就是 A，A是alive的，而this依然是Thread-0，非alive的

       System.out.println("run  --  begin");

       System.out.println("Thread.currentThread().getName()= " + Thread.currentThread().getName());

       System.out.println("Thread.currentThread().isAlive()= " + Thread.currentThread().isAlive());

       System.out.println("this.getName()= " + this.getName());

       System.out.println("this.isAlive()= " + this.isAlive());

       System.out.println("run -- end ");

    }

 

}

 

 

package threadTest;

 

public class Run {

    public static void main(String[] args){

       //this就代表 c 对象,创建对象的线程就是Thread-0，此时有两个线程，还有一个是main

       CountOperate c =new CountOperate();

       Thread t1=new Thread(c);

       //线程t1未启动，非alive

       System.out.println("main begin t1 isAlive()" + t1.isAlive());

       t1.setName("A");

       //又启动一个线程 A，此时共三个线程。

       t1.start();

       //线程t1启动，alive

       System.out.println("main begin t1 isAlive()" + t1.isAlive());

    }

 

}

 

参考 《JAVA多线程编程核心技术》高洪岩