等待唤醒机制

package comm;

class Res {
    String name;
    String sex;
    boolean flag = false;
}

class Input implements Runnable {
    private Res r;

    public Input(Res r) {
        this.r = r;
    }

    public void run() {
        int x = 0;
        while (true) {

            synchronized (r) {

                if (r.flag)
                    try {
                        r.wait();
                    } catch (InterruptedException e) {
                    }
                if (x == 0) {
                    r.name = "mike";
                    r.sex = "man";
                } else {
                    r.name = "丽丽";
                    r.sex = "女女女";
                }
                x = (x + 1) % 2;
                r.flag = true;
                r.notify();
            }
        }
    }
}

class Output implements Runnable {
    private Res r;

    public Output(Res r) {
        this.r = r;
    }

    public void run() {
        while (true)
            synchronized (r) {
                if (!r.flag)
                    try {
                        r.wait();
                    } catch (InterruptedException e) {
                    }
                System.out.println(r.name + " , " + r.sex);
                r.flag = false;
                r.notify();
            }
    }
}

public class InputOutoutDemo {

    public static void main(String[] args) {

        Res r = new Res();
        Input in = new Input(r);
        Output out = new Output(r);
        Thread t1 = new Thread(in);
        Thread t2 = new Thread(out);
        t1.start();
        t2.start();
    }
}