Java学习 day15-17打卡

2023-02-23 21:42:48 913 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

微信小程序拍照打卡功能实现微信小程序拍照打卡功能实现小程序端签到页面wxml签到页面js拍照页面wxml拍照页面jsJava后台保存照片保存打卡数据由于拍照组件是相当于一个块，用隐藏是显示的方法不太好，为了更好的用户交互，选择了在一个新的页面调用相机组件，上传组件并保存打卡数据的方式。小程序端签到页面wxml <view class="signBtn" bindtap="signSubmit"> &... 阅读详情

USB接口案例

package day15;

/**
 * @author xpl
 * @create 2023-02-23 15:47
 */
public interface USB {
    public abstract void open();
    public abstract void close();
}


package day15;

/**
 * @author xpl
 * @create 2023-02-23 15:52
 */
public class Mouse implements USB {

    @Override
    public void open() {
        System.out.println("打开鼠标");
    }

    @Override
    public void close() {
        System.out.println("关闭鼠标");
    }

    public void click() {
        System.out.println("鼠标点击");
    }
}


package day15;

/**
 * @author xpl
 * @create 2023-02-23 15:52
 */
public class Keyboard implements USB {

    @Override
    public void open() {
        System.out.println("打开键盘");
    }

    @Override
    public void close() {
        System.out.println("关闭键盘");
    }
    public void type() {
        System.out.println("键盘输入");
    }
}



package day15;

/**
 * @author xpl
 * @create 2023-02-23 15:49
 */
public class Laptop {
    public void powerOn() {
        System.out.println("笔记本电脑开机");
    }
    public void powerOff() {
        System.out.println("笔记本电脑关机");
    }
    public void userService(USB usb) {
        usb.open();
        if(usb instanceof Mouse) {
            Mouse mouse = (Mouse) usb;
            mouse.click();
        }else if(usb instanceof Keyboard) {
            Keyboard keyboard = (Keyboard) usb;
            keyboard.type();
        }

        usb.close();
    }
}


package day15;

/**
 * @author xpl
 * @create 2023-02-23 15:57
 */
public class Test {
    public static void main(String[] args) {
        Laptop laptop = new Laptop();
        laptop.powerOn();

        USB usb = new Mouse();
        laptop.userService(usb);

        Keyboard keyboard = new Keyboard();
        laptop.userService(keyboard);

        //laptop.userService(new Keyboard());
        laptop.powerOff();
    }
}

计算出生天数

package day17;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Scanner;

/**
 * @author xpl
 * @create 2023-02-23 21:06
 */
public class DateTest {
    public static void main(String[] args) throws ParseException {
        Scanner scanner = new Scanner(System.in);
        String birthday = scanner.next();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Date birthdayDate = sdf.parse(birthday);
        long birthdayDateTime = birthdayDate.getTime();
        long todayTime = new Date().getTime();
        long day = todayTime - birthdayDateTime;
        System.out.println(day / 1000 / 60 / 60 / 24);

    }
}

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