多线程实现输出当前时间，和猜数字游戏

题目1：编写一个应用程序，利用Java多线程机制，实现时间的同步输出显示。

题目2：编写一个应用程序，利用Java多线程机制，实现猜数字游戏（随机数范围0~100之间的整数）。

题目1：

package Test;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

public class PrintCurrentTIme {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Timer timer = new Timer();
        timer.schedule(new TimerTask() {
            @Override
            public void run() {
                Date date = new Date();
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd  HH:mm:ss");
                String time = sdf.format(date);
                System.out.println(time);
            }
        },0, 1000);
    }

}

运行结果：

题目2：

package Test;

import java.util.Random;
import java.util.Scanner;

public class GuessNumber {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        NumberTest number = new NumberTest();
        RandomNumberRun ran = new RandomNumberRun(number);
        GiveNumberRun give = new GiveNumberRun(number);
        ran.start();
        give.start();
    }
}

class RandomNumberRun extends Thread {
    NumberTest number1;

    RandomNumberRun(NumberTest number1) {
        this.number1 = number1;
    }

    @Override
    public void run() {
        // TODO Auto-generated method stub
        Random ran = new Random();
        while (true) {
            synchronized (number1) {
                while (number1.flag) {
                    try {
                        number1.wait();
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
                int num = ran.nextInt(101);
                number1.setNum1(num);
                number1.notifyAll();
                number1.flag = true;
            }
        }
    }
}
class GiveNumberRun extends Thread {
    NumberTest number2;

    GiveNumberRun(NumberTest number2) {
        this.number2 = number2;
    }
    @Override
    public void run() {
        // TODO Auto-generated method stub
        Scanner read = new Scanner(System.in);
        while (true) {
            System.out.println("请输入0~100的数字！！！");
            synchronized (number2) {
                while (!number2.flag) {
                    try {
                        number2.wait();
                    } catch (InterruptedException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
                number2.setNum2(read.nextInt());
                number2.flag = false;
                number2.PrintRes();
                number2.notifyAll();
            }
        }

    }
}
class NumberTest {
    public boolean flag = false;
    private int num1;
    private int num2;

    public int getNum1() {
        return num1;
    }

    public void setNum1(int num1) {
        this.num1 = num1;
    }

    public int getNum2() {
        return num2;
    }

    public void setNum2(int num2) {
        this.num2 = num2;
    }

    public void PrintRes() {
        if (num1 > num2) {
            System.out.println("小了");
        } else if (num1 < num2) {
            System.out.println("大了");
        } else {
            System.out.println("猜对了！！！");
        }
    }
}

运行结果：