在编写多线程代码时,如果主线程结束,那么子线程也会随之结束,如何等待线程结束再往下执行。

 

等待线程执行完成代码。

 

线程代码:

 

package demo;

import java.util.concurrent.CountDownLatch;

public class NodeSqlThread1 implements Runnable{
   
    private CountDownLatch cdlSync;
   
    public NodeSqlThread1(CountDownLatch cdlSync){
        this.cdlSync=cdlSync;
    }
   

    @Override
    public void run() {
        for(int i=0;i<100;i++){
            try {
                Thread.sleep(50);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        cdlSync.countDown();
    }
   
   
}

 

package demo;

import java.util.concurrent.CountDownLatch;

import com.hotent.BaseTestCase;

public class NodeSqlTest1 extends BaseTestCase {

    static CountDownLatch cdlSync=new CountDownLatch(10);
   
    @org.junit.Test
    public void test() throws InterruptedException{
        NodeSqlThread1 t =new NodeSqlThread1(cdlSync);
        for(int i =0;i< 10;i++){
            new Thread(t).start();
        }
        cdlSync.await();
        System.out.println(cdlSync.getCount()+"完成");
    }

}

最重要的是  cdlSync.await(); 它会等待所有线程结束后继续往下执行。

posted on 2015-07-24 09:04  自由港  阅读(1559)  评论(0编辑  收藏  举报