区别多线程类中的this与currentThread()

currentThread（）函数返回的是“正在调用当前代码段的线程”
this 指代的是本类/实例

用以下代码进行区分：

package thisVScurrentThread;

/**
 * PROJECT_NAME: Multi-thread Programming
 * PACKAGE_NAME: thisVScurrentThread
 *
 * @author Jackhow Michael
 * @time 01-26 2021  22:54
 * @description: 区别this与currentThread()的demo
 * currentThread()表示的是当前代码段正在被哪个线程调用
 * this 指代本线程类
 */
public class Operate extends Thread{
    public Operate() {
        System.out.println("--------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("--------end----------");
    }

    @Override
    public void run(){
        System.out.println("--------runBegin--------");
        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("--------runEnd----------");
    }

    public static void main(String[] args) {
        Operate o = new Operate();  //此时尚未设定实例o的name，默认为thread-0
        o.setName("O");
        Thread t = new Thread(o);
        System.out.println("main begin, t is alive: " + t.isAlive());
        t.setName("T");
        t.start();
        System.out.println("main end, t is alive: " + t.isAlive());
    }
}

输出结果如下：

可以直接在Operate类的构造函数中设置Operate类的线程名：this.setName(“O”);
就不会再输出默认值Thread-0