代码同步优化

class Res
{
    private String name;
    private String gender;
    private boolean flag;
  
    //根据面向对象的原则，把和属性相关的功能写在类中。
    //存入数据
    public synchronized void set(String name,String gender)
    {
        if(flag)
        {
            try{wait();}catch(InterruptedException e){e.printStackTrace();}
        }
        this.name = name;
        this.gender = gender;
        flag = true;
        notify();
    }

    //输出数据
    public synchronized void out()
    {
        if(!flag)
        {
            try{wait();}catch(InterruptedException e){e.printStackTrace();}
        }
        System.out.println(name + "....." + gender);
        flag = false;
        notify();
    }
}

//输入任务
class Input implements Runnable
{
    private Res res;
    public Input(Res res)
    {
        this.res = res;
    }
    public void run()
    {   
        int i = 1;
        while(true)
        {
            if(i==1)
                res.set("猪小明","男");
            else
                res.set("腿腿","女");
            i = (++i)%2;
        }
    }
}

//输出任务
class Output implements Runnable
{
    private Res res;
    public Output(Res res)
    {
        this.res = res;
    }
    public void run()
    {
        while(true)
        {
            res.out();
        }    
    }
}

class Demo
{
    public static void main(String[] args)
    {
        Res res = new Res();
        Input input = new Input(res);
        Output output = new Output(res);

        new Thread(input).start();
        new Thread(output).start();

    }
}