线程状态与停止线程

package com.Thread;

 

 

public class State {

       public static void main(String[] args) {

            Study s = new Study();

            Thread t = new Thread(s);

            

            t.start();  

             //外部干涉-->停止线程体

             for(int i = 0; i<1000; i++) {

                   if(i==500) {

                        s.setFlag( false);

                  }

                  System. out.println("main Thread...." + i);

            }

      }

}

class Study implements Runnable {

       //1、定义线体类中--->线程体使用标识

       private boolean flag = true;

      

       @Override

       public void run() {

             //2、线程体使用该标识

             while(flag ) {

                  System. out.println("Study Tread...." );

            }

      }

      

       //3、对外提供方法修改此标识

       public void setFlag(boolean flag) {

             this.flag = flag;

      }

      

}