join

package com.icss.biz.ppt;


/**
 * thinking in java p597
 */
public class JoinTest{

public static void main(String[] args) {
Sleeper sleeper = new Sleeper();
sleeper.start();

Joiner joiner = new Joiner(sleeper);
joiner.start();
}
}



class Sleeper extends Thread
{
public void run() {

System.out.println("Sleeper线程id=" + Thread.currentThread().getId() +  "   start run");
try {
for(int i=0;i<50;i++){
Thread.sleep(100);
System.out.println("线程" + Thread.currentThread().getId() + "---i=" + i);
}
} catch (Exception e) {
// TODO: handle exception
}
System.out.println("Sleeper线程id=" + Thread.currentThread().getId()+  "   end");
    }
}




class Joiner extends Thread
{
private Sleeper m_sleeper;
public Joiner(Sleeper sleeper ){
m_sleeper = sleeper;
}
public void run() {
System.out.println("线程id=" + Thread.currentThread().getId()+  "  start run");

try {
for(int i=0;i<50;i++){
Thread.sleep(100);
System.out.println("线程" + Thread.currentThread().getId() + "---k=" + i);
if(i==5){
System.out.println("sleeper准备加入到当前线程线程" + Thread.currentThread().getId());
m_sleeper.join();//sleeper加入到当前线程,当前线程被阻塞，等待sleeper运行结束后这个线程才继续运行
} m-sleeper.join()加入之后呢执行m_sleeper（）的线程
}
} catch (Exception e) {
// TODO: handle exception
}
System.out.println("线程id=" + Thread.currentThread().getId()+  "  end");
    }
}