AtomicInteger和Integer区别 

 1 package com.noway.test;
 2 
 3 import java.util.ArrayList;
 4 import java.util.List;
 5 import java.util.concurrent.Callable;
 6 import java.util.concurrent.ExecutionException;
 7 import java.util.concurrent.FutureTask;
 8 import java.util.concurrent.atomic.AtomicInteger;
 9 
10 /**
11  * AtomicInteger和Integer区别
12  * AtomicInteger可保证多线程中保持原子操作,适用于在多线程中的计算
13  * @author Noway
14  */
15 public class TestAtomicInteger {
16     
17     static Integer result = 0;
18 
19         static AtomicInteger ai = new AtomicInteger();
20     
21     public static void main(String[] args) throws InterruptedException, ExecutionException {
22         List<FutureTask<Integer>> ftList = new ArrayList<FutureTask<Integer>>();
23         for (int i = 0; i < 10000; i++) {
24             FutureTask<Integer> ft = new FutureTask<Integer>(new Callable<Integer>() {
25                 @Override
26                 public Integer call() throws Exception {
27                     result+= 1;
28                     return ai.incrementAndGet();
29                 }
30             });
31             new Thread(ft).start();
32             ftList.add(ft);
33         }
34         for (int i = 0; i < ftList.size(); i++) {
35             ftList.get(i).get();//保证所有的线程执行完成
36         }
37         System.out.println("result====="+result);
38         System.out.println("ai===="+ai.get());
39     }
40     
41 }

 

posted @ 2016-12-27 16:15  Noway_Zz  阅读(1775)  评论(0)    收藏  举报