总结:
this指正在被调用的线程对象
currentThread是返回该代码段被哪个线程调用
看个例子:
public class CountOperate extends Thread {
public CountOperate() {
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
synchronized public void run() {
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");
}
}
测试代码:
public static void main(String[] args) {
CountOperate c= new CountOperate();
c.setName("CountOperate");
c.start();
Thread t1 = new Thread(c);
System.out.println("main begin t1 isAlive="+t1.isAlive());
t1.setName("t1");
t1.start();
System.out.println("main end t1 isAlive="+t1.isAlive());
}
得出结果
CountOperate—begin
Thread.currentThread().getName()=main
Thread.currentThread().isAlive()true
this.getName()Thread-0 这里这个this是CountOperate类的对象,CountOperate继承了Thread
this.isAlive()false
CountOperate—end
main begin t1 isAlive=false
main end t1 isAlive=true
run—begin
Thread.currentThread().getName()=CountOperate
Thread.currentThread().isAlive()true
this.getName()CountOperate
this.isAlive()true
run—end
run—begin
Thread.currentThread().getName()=t1
Thread.currentThread().isAlive()true
this.getName()CountOperate
this.isAlive()false
run—end
参考高洪岩的《Java多线程编程核心技术》