Java多线程脏读

package com.wkcto.intrinsiclock;

/**
 * 脏读
 *  出现读取属性值出现了一些意外, 读取的是中间值,而不是修改之后 的值
 *  出现脏读的原因是 对共享数据的修改 与对共享数据的读取不同步
 *  解决方法:
 *      不仅对修改数据的代码块进行同步,还要对读取数据的代码块同步
 * Author: 老崔
 */
public class Test08 {
    public static void main(String[] args) throws InterruptedException {
        //开启子线程设置用户名和密码
        PublicValue publicValue = new PublicValue();
        SubThread t1 = new SubThread(publicValue);
        t1.start();

        //为了确定设置成功
        Thread.sleep(100);
        //在main线程中读取用户名,密码
        publicValue.getValue();
    }

    //定义线程,设置用户名和密码
    static class  SubThread extends  Thread{
        private PublicValue publicValue;
        public SubThread( PublicValue publicValue){
            this.publicValue = publicValue;
        }

        @Override
        public void run() {
            publicValue.setValue("bjpowernode", "123");
        }
    }

    static class PublicValue{
        private String name = "wkcto";
        private String pwd = "666";

        public synchronized void getValue(){
            System.out.println(Thread.currentThread().getName() + ", getter -- name: " + name + ",--pwd: " + pwd);
        }

        public synchronized void setValue(String name, String pwd){
            this.name = name;
            try {
                Thread.sleep(1000);             //模拟操作name属性需要一定时间
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            this.pwd = pwd;
            System.out.println(Thread.currentThread().getName() + ", setter --name:" + name + ", --pwd: " + pwd );
        }
    }
}