多线程中this、Thread.currentThread()和this.currentThread()的区别

this指的是当前对象，而Thread.currentThread()指的是当前运行的线程对象，这两者有时不一定相同。

如下列代码所示

public class CountOperate extends Thread{
public CountOperate(){
System.out.println("CountOperate---begin");
System.out.println("current name is "+Thread.currentThread().getName());
System.out.println("Thread.currentThread().isAlive()="+Thread.currentThread().isAlive());
System.out.println("this name is "+this.getName());
System.out.println("this.isAlive()="+this.isAlive());
System.out.println("CountOperate---end");
}

}

main函数

public class Run {
public static void main(String[] args) {
// TODO Auto-generated method stub
CountOperate c = new CountOperate();
Thread t1 = new Thread(c);
}

}

输出结果



Thread.currentThread()和this.currentThread()在大部分情况下结果是相同的，都是调用Thread的静态方法currentThread()，若当前子类重写了父类的currentThread()方法，那么Thread.currentThread()和this.currentThread()返回的结果会不同。