Java/src/main/java/com/lyss/java/concurrent/DirtyRead.java at master · Tomones/Java

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package com.lyss.java.concurrent;

/**

* 脏读

* 该类中共有两个线程在同时执行

* 主线程和Thread1

* 此案例的目的在于当一个线程设置值时不希望别的线程去调用值

* 所以需要在两个方法上加synchronized 方法

* 因为此案例中只有一个对象，所以只有一把锁

public class DirtyRead {

private String username = "guotao";

private String password = "guotao123";

public synchronized void setValue(String username, String password){

this.username = username;

try {

Thread.sleep(2000);

} catch (InterruptedException e) {

e.printStackTrace();

}

this.password = password;

System.out.println("SetValue 的最终结果是：username = "+username+","+"password ="+password);

}

public void getValue(){

System.out.println("getValue 得到的结果是：username = "+this.username+","+"password ="+this.password);

}

public static void main(String[] args) throws InterruptedException {

final DirtyRead dirtyRead = new DirtyRead();

Thread thread1 = new Thread(new Runnable() {

@Override

public void run() {

dirtyRead.setValue("郭涛", "123456");

}

});

thread1.start();

Thread.sleep(1000);

dirtyRead.getValue();

}