上一篇 弹球小游戏(预备篇)

       这是一个用JAVA写的弹球游戏，适合于刚学习的awt编程的萌新，由于Nick也是刚刚学习，所以写的很简陋，大家多多见谅！

弹球小游戏

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class PinBall {

    //创建窗口对象
    private Frame frame = new Frame("Nick的弹球游戏");

    //桌面宽度
    private final int TABLE_WIDTH = 300;
    //桌面高度
    private final int TABLE_HEIGHT = 400;

    //球拍的高度和宽度
    private final int RACKET_HEIGHT = 20;
    private final int RACKET_WIDTH = 60;


    //小球直径大小
    private final int BALL_SIZE = 16;

    //定义变量,记录小球的坐标
    private int ballX = 120;
    private int ballY = 20;

    //定义变量小球x和y方向上分别移动的速度
    private int speedY = 15;
    private int speedX = 10;

    //定义变量,记录球拍的坐标
    private int racketX = 120;
    private final int racketY = 340;

    //定义变量,标识当前游戏是否结束
    private boolean isOver = false;

    //声明一个定时器
    private Timer timer;


    //自定义一个类，继承canvas，充当画布
    private class MyCanvas extends Canvas{
        @Override
        public void paint(Graphics g) {
            //在这里绘制内容
            if(isOver){
                //游戏结束
                g.setColor(Color.blue);

                g.setFont(new Font("Times",Font.BOLD,30));

                g.drawString("游戏结束",50,200);
            }else{
                //游戏中

                //绘制小球
                g.setColor(Color.RED);
                g.fillOval(ballX,ballY,BALL_SIZE,BALL_SIZE);//填充圆形

                //绘制球拍
                g.setColor(Color.BLACK);
                g.fillRect(racketX,racketY,RACKET_WIDTH,RACKET_HEIGHT);
            }

        }
    }

    //创建绘画区域
    MyCanvas drawArea = new MyCanvas();


    public void init(){
        //组装视图,游戏逻辑的控制
        KeyListener listener=new KeyAdapter() {

            public void keyPressed(KeyEvent e) {
                int keyCode=e.getKeyCode();
                if(keyCode ==KeyEvent.VK_LEFT) {
                    //左移
                    if(racketX>0) {
                        racketX-=10;
                    }
                }
                if(keyCode == KeyEvent.VK_RIGHT) {
                    //右移
                    if(racketX < (TABLE_WIDTH-RACKET_WIDTH)) {
                        racketX+=10;
                    }
                }
            }

        };

        //给 Frame 和 drawArea 注册***
        frame.addKeyListener(listener);
        drawArea.addKeyListener(listener);

        //小球坐标控制
        ActionListener task = new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                //根据边界范围，修正速度
                if(ballX<=0 || ballX>=(TABLE_WIDTH-BALL_SIZE)){
                    speedX = -speedX;
                }
                if(ballY<=0 || ballY>racketY-BALL_SIZE && ballX<racketX+RACKET_WIDTH){
                    speedY = -speedY;
                }
                if(ballY > racketY-BALL_SIZE && (ballX < racketX || ballX>racketX+RACKET_WIDTH)){
                    //当前小球超出了球拍的范围,游戏结束

                    //停止定时器
                    timer.stop();
                    //修改游戏是否结束的标记
                    isOver = true;
                    //重绘界面
                    drawArea.repaint();
                }

                //更新小球坐标重绘界面
                ballX+=speedX;
                ballY+=speedY;
                //重绘界面
                drawArea.repaint();
            }
        };
        timer = new Timer(95,task);
        timer.start();

        drawArea.setPreferredSize(new Dimension(TABLE_WIDTH,TABLE_HEIGHT));
        frame.add(drawArea);

        //设置frame最佳大小，并可视

        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        new PinBall().init();
    }
}