第16周作业

 

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。

 

主代码:

package org.ccut.pack18;


import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 系统时间同步
 */
public class TimeSync implements Runnable {

    @Override
    public void run() {
        Date date = null;
        while (true) {
            date = new Date();
            // 时间格式化对象
            DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss EE");
            System.out.println(dateFormat.format(date));
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

 

 

测试代码:

package org.ccut.pack18;


public class TestTimeSync {

    public static void main(String[] args) {
        System.out.println("当前时间:");
        Thread t = new Thread(new TimeSync());
        t.start();
    }

}

 

 

运行结果:

 

 

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）。

 

主代码:

package org.ccut.pack19;

import java.util.Random;

public class PickNumberGame implements Runnable{

    int num;

    public synchronized void run() {
        Random n=new Random();
        num=n.nextInt(100);
    }
    public int getNum() {
        return num;
    }
    public void setNum(int num) {
        this.num = num;
    }

}

 

 

测试代码:

package org.ccut.pack19;

import java.util.Scanner;

public class MainTest {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        PickNumberGame randNum = new PickNumberGame();
        // 创建线程对象
        Thread t = new Thread(randNum);
        t.start();
        System.out.println("猜数字游戏开始！输入一个数字:");
        try {
            Thread.sleep(1000);
            while (true) {
                t.interrupt();
                int num = scanner.nextInt();
                if (randNum.getNum() == num) {
                    System.out.println("猜对了");
                    break;
                } else if (num < randNum.getNum()) {
                    System.out.println("猜小了");
                } else if (num > randNum.getNum()) {
                    System.out.println("猜大了");
                }
            }
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

 

 

 

运行结果: