hashset并发产生的java.util.ConcurrentModificationException解决办法

package com.yonge.concurrent;

import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Random;
import java.util.Set;

/**
 * 需求：解决hashset并发产生的java.util.ConcurrentModificationException异常
 * @author wb-gaoy
 * @version $Id: HashSetTest.java,v 0.1 2012-1-11 下午5:14:53 wb-gaoy Exp $
 */
public class HashSetTest {

    public static void main(String[] args) {

        final Set<Integer> set = Collections.synchronizedSet(new HashSet<Integer>());
        //开启A线程向set中放数据
        new Thread(new Runnable() {

            @Override
            public void run() {
                int i;
                while (true) {
                    try {
                        i = new Random().nextInt(1000);
                        System.out.println("准备加入到Set...");
                        set.add(i);
                        System.out.println("加入到Set:" + i);
                    } catch (Exception e) {
                        e.printStackTrace();
                        break;
                    }
                }
                System.exit(0);
            }
        }, "A").start();

        //开启B线程删除set中的数据
        new Thread(new Runnable() {

            @Override
            public void run() {
                Iterator<Integer> iter = null;
                while (true) {
                    synchronized (set) {
                        try {
                            iter = set.iterator();
                            System.out.println("开始迭代..");
                            int i;
                            while (iter.hasNext()) {
                                System.out.println("准备删除Set....");
                                i = iter.next();
                                iter.remove();
                                System.out.println("删除Set：" + i);
                            }
                        } catch (Exception e) {
                            e.printStackTrace();
                            break;
                        }
                    }
                }
                System.exit(0);
            }
        }, "B").start();
    }
}

 

评论

1 楼 unsure520 2012-01-13  

        不小心踩了一脚