java多线程编程之二（currentThread）

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currentThread方法

代码CountOperate：



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package thread.currentThread;

public class CountOperate extends Thread{
  public CountOperate(){
    System.out.println("countOperate Thread.currentThread().getName()====" + Thread.currentThread().getName());
    System.out.println("countOperate getName()=====" + this.getName());
  }
  
  @Override
  public void run(){
    System.out.println("run Thread.currentThread().getName()====" + Thread.currentThread().getName());
    System.out.println("run getName()====" + this.getName());
  }

  
  
}

代码CountOperateMain:



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package thread.currentThread;

public class CountOperateMain {
  public static void main(String[] args) {
    CountOperate thread = new CountOperate();
    thread.setName("countOperate");
    //thread.start();
    
    Thread mainThread = new Thread(thread);
    mainThread.setName("mainThread");
    mainThread.start();
    
  }
}

运行CountOperateMain返回结果如下：



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countOperate Thread.currentThread().getName()====main
countOperate getName()=====Thread-0
run Thread.currentThread().getName()====mainThread
run getName()====countOperate

解析： 1.Thread.currentThread().getName()获取的是当前调用这部分程序块的线程； 2.如构造函数是由Main的线程调用的； 3.如CountOperate线程是作为参数target传入mainThread，被mainThread调用的，则返回的是mainThread 4.如this.getName()获取的则是这个线程对象的名称；


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