Java ConcurrentHashMap存入引用对象时也是线程安全的

本人小白,看到资料说ConcurrentHashMap是线程安全的,get过程不需要加锁,put是线程安全的,推荐高并发时使用.但是本人不清楚是否该map中存入的引用类型对象,对象属性变化也是否线程安全的,看了很多资料,貌似都没说明这一点,所以写代码测试一下,

package testConcurrentHashMap;

import java.util.concurrent.ConcurrentHashMap;

/** * Created by xuzimian on 17-3-1. */ public class testConcurrentHashMap { public ConcurrentHashMap<String,TestModel> map=new ConcurrentHashMap();

public void testFunc(){

    map.put("test",new TestModel(1));

    Thread thread = new Thread() {
        @Override
        public void run() {
            int n=0;
            while (n<100){
                System.out.println("线程1" + ":" + map.get("test"). getValue());
                map.get("test").setValue(map.get("test").getValue()+1);
                n++;
                //ConcurrentUtils.sleep(10);
                try {
                    Thread.sleep(60);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }

        }
    };
    thread.run();


    Thread thread1 = new Thread() {
        @Override
        public void run() {
            int n = 0;
            while(n<100) {
                System.out.println("线程2" + ":" + map.get("test"). getValue());
                n++;
                ConcurrentUtils.sleep(1);
            }
        }
    };
    thread1.run();

}

}

结果如下:

线程1:1
线程1:2
线程1:3
线程1:4
线程1:5
线程1:6
线程1:7
线程1:8
线程1:9
线程1:10
线程1:11
线程1:12
线程1:13
......省略
线程1:100
线程2:101
......省略
线程2:101
线程2:101