Java多线程同步锁

公用资源类Resource

public class Resource 
{
    private String name;
    private String sex;
    private boolean flag = false; //false表示未填数据,true表示已填数据
    
    public synchronized void set(String name,String sex)   //同步函数使用的锁是本实例对象即this
    {
        if(flag)
            try{this.wait();}catch(InterruptedException e){}
        this.name = name;
        this.sex = sex;
        flag = true;
        this.notify();
    }
    
    public synchronized void out()
    {
        if(!flag)
            try{this.wait();}catch(InterruptedException e){}
        System.out.println("姓名是: "+name+" 性别为"+sex);
        flag = false;
        this.notify();
    }

}

负责向资源类填数据的Input类

public class Input implements Runnable 
{
    private Resource r;
    
    public Input(Resource r)
    {
        this.r = r;
    }

    @Override
    public void run() 
    {
        int x =0 ;
        while(true)
        {
            if(x==0)
                r.set("张三", "男");
            else
                r.set("赵丽", "女");
            x=(x+1)%2;
        }
    }

}

负责从资源类中读数据的OutPut类

public class OutPut implements Runnable 
{
    private Resource r;
    
    public OutPut(Resource r)
    {
        this.r = r;
    }

    @Override
    public void run() 
    {
        while(true)
            r.out();
    }

}

测试类

import org.junit.Test;

public class Client 
{
    Resource r = new Resource();
    Input i = new Input(r);
    OutPut o = new OutPut(r);
    
    Thread t1 = new Thread(i);
    Thread t2 = new Thread(o);
    
    @Test
    public void clientTest()
    {
        t1.start();
        t2.start();
    }

}