[javaSE] 多线程（join方法）详解编程语言

class JoinTestDemo implements Runnable{ 
 
    @Override 
    public void run() { 
         
        for(int x=0;x<=5;x++){ 
            try { 
                Thread.sleep(100); 
            } catch (InterruptedException e) { 
                // TODO Auto-generated catch block 
                e.printStackTrace(); 
            } 
            System.out.println(Thread.currentThread().getName()+"===="+x); 
        } 
    } 
     
} 
public class JoinDemo { 
 
    /** 
     * @param args 
     * @throws InterruptedException  
     */ 
    public static void main(String[] args) throws InterruptedException { 
        JoinTestDemo join=new JoinTestDemo(); 
        Thread t1=new Thread(join); 
        Thread t2=new Thread(join); 
        t1.start(); 
        t2.start(); 
        //上面两个子线程交替执行，主线程冻结，t1走完才解冻 
        t1.join(); 
        //显示主线程 
        for(int x=0;x<=5;x++){ 
            Thread.sleep(100); 
            System.out.println(Thread.currentThread().getName()+"===="+x); 
        } 
    } 
 
}