JAVA进阶16

间歇性混吃等死，持续性踌躇满志系列-------------第16天

1、桌球游戏小项目

①窗口加载

import javax.swing.*;

public class BallGame extends JFrame {

    //窗口加载
    void launchFrame() {
        setSize(300, 300);
        setLocation(100, 100);
        setVisible(true);
    }

    public static void main(String[] args) {
        System.out.println("游戏体验");
        BallGame game = new BallGame();
        game.launchFrame();
    }
}

运行结果图

②小球左右移动

注：图片加载不出可尝试用绝对路径

import javax.swing.*;
import java.awt.*;

public class BallGame extends JFrame {

    Image ball = Toolkit.getDefaultToolkit().getImage("F:/Java/MyGame/Demo01/images/ball.png");
    Image desk = Toolkit.getDefaultToolkit().getImage("F:/Java/MyGame/Demo01/images/desk.jpg");
    //小球的横坐标
    double x = 100;
    //小球的纵坐标
    double y = 100;
    //方向
    boolean right = true;

    //画窗口的方法
    public void paint(Graphics g) {
        System.out.println("窗体被画了一次！");
        g.drawImage(desk, 0, 0, null);
        g.drawImage(ball, (int) x, (int) y, null);

        if (right) {
            x += 10;
        } else {
            x -= 10;
        }
        //856是窗口宽度，40是桌子边框的宽度，30是小球的直径
        if (x > 856-40-30) {
            right = false;
        }
        //40是桌子边框的宽度
        if (x < 40) {
            right = true;
        }
    }

    //窗口加载
    void launchFrame() {
        setSize(856, 500);
        setLocation(50, 50);
        setVisible(true);

        //重画窗口,每秒画25次
        while (true) {
            repaint();
            try {
                Thread.sleep(40);
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }

    public static void main(String[] args) {
        System.out.println("游戏体验");
        BallGame game = new BallGame();
        game.launchFrame();
    }
}

运行结果图

③实现圆球上下弹动

import javax.swing.*;
import java.awt.*;

public class BallGame01 extends JFrame {

    Image ball = Toolkit.getDefaultToolkit().getImage("F:/Java/MyGame/Demo01/images/ball.png");
    Image desk = Toolkit.getDefaultToolkit().getImage("F:/Java/MyGame/Demo01/images/desk.jpg");
    //小球的横坐标
    double x = 100;
    //小球的纵坐标
    double y = 100;

    //弧度，此处就是60度
    double degree = 3.14 / 3;

    //画窗口的方法
    public void paint(Graphics g) {
        System.out.println("窗体被画了一次！");
        g.drawImage(desk, 0, 0, null);
        g.drawImage(ball, (int) x, (int) y, null);

        x = x + 10 * Math.cos(degree);
        y = y + Math.sin(degree);

        if (y > 500 - 40 - 30 || y < 40) {
            degree = -degree;
        }
        if (x < 0 || x > 856) {
            degree = 3.14 - degree;
        }
    }

    //窗口加载
    void launchFrame() {
        setSize(856, 500);
        setLocation(50, 50);
        setVisible(true);

        //重画窗口,每秒画25次
        while (true) {
            repaint();
            try {
                Thread.sleep(40);
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }

    public static void main(String[] args) {
        System.out.println("游戏体验");
        BallGame01 game = new BallGame01();
        game.launchFrame();
    }
}

运行结果图

 

2、三元运算符

public class TestOperator01 {
    public static void main(String[] args) {
//        boolean b1 = true;
//        boolean b2 = false;
//        System.out.println(b1 & b2);
//        System.out.println(b1 ^ b2);
//        System.out.println(b1 || b2);
//        System.out.println(!b2);
//
        //三元运算符
        int score = 80;
        String type = score<60?"不及格":"及格";
        System.out.println(type);

        //条件判断
        if (score>60){
            System.out.println("及格");
        }else {
            System.out.println("不及格");
        }
    }
}

运行结果图

3、嵌套循环

import java.util.Scanner;

public class TestOperator01 {
    public static void main(String[] args) {
        for (int i = 1; i <= 5; i++) {
            for (int j = 1; j <= 5; j++) {
                System.out.print(i+"\t");
            }
            System.out.println(" ");
        }
    }
}

运行结果图

4、嵌套循环打印九九乘法表

public class TestOperator01 {
    public static void main(String[] args) {
        for (int i = 1; i < 10; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print(j+"*"+i+"="+i*j+"\t");
            }
            System.out.println();
        }
    }
}

运行结果图

5、循环输出1-1000之间能被5整除的数，且每行输出5个

public class TestOperator01 {
    public static void main(String[] args) {
        int h = 0;
        for (int i = 1; i <= 1000; i++) {
            if (i%5==0){
                System.out.print(i+"\t");
                h++;
            }
            if (h==5){
                System.out.println();
                h=0;
            }
        }
        }
    }

运行结果图