JAVA线程停止的方法

package com.stop.thread;

public class MyThread implements Runnable{

private boolean flag=false;

public void run()
{
System.out.println("线程运行");
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
while(flag)
{
System.out.println("执行");
}

}

public void start()
{
this.flag=true;
}

public void stop()
{
this.flag=false;