This article mainly introduces the implementation of simple pinball game in Java in detail, which has certain reference value. Interested friends can refer to
Principle of pinball game implementation:
Redraw the image after a certain period of time (less than 1 second). Because the Graphics class is an abstract class, all methods involved need to be rewritten when creating a subclass, so what is used here is to create a subclass of Canvas. Just need to override its paint() method to achieve it. Here we use keyboard listening events, Timer class, etc.
Game Description:
The small ball in this pinball game will increase speed over time and the maximum speed is 10 horizontal speed and 10 vertical speed. When the y coordinate (vertical coordinate) of the ball is greater than the y coordinate (vertical coordinate) of the racket, the game is judged to be over. The console displays the speed of the ball in the x direction and the y direction.
import java.awt.*; import java.util.Random; import javax.swing.Timer; import java.awt.event.*; public class PinBall { private Frame f=new Frame("弹球游戏"); Random rand=new Random(); //桌面的宽度以及高度 private final int TABLE_WIDTH=300; private final int TABLE_HEIGHT=400; //球拍的宽度以及高度以及水平位置、垂直位置 private final int RACKET_WIDTH=60; private final int RACKET_HEIGHT=20; private int racketX=rand.nextInt(24)*10; private int racketY=300; //小球的大小、运行速度、坐标 private final int BALL_SIZE=16; private int ySpeed=1; private double xyRate=1; private int xSpeed=(int)(xyRate*ySpeed); private int ballX=rand.nextInt(284); private int ballY=1; //创建画布 private MyCanvas tableArea=new MyCanvas(); //定义时间类 Timer timer; //游戏是否结束的旗标 private boolean isLose=false; //设置游戏等级 private int time_times=1; public void init(){ tableArea.setPreferredSize(new Dimension(TABLE_WIDTH,TABLE_HEIGHT)); f.add(tableArea); //定义键盘监听器 KeyAdapter keyProcessor=new KeyAdapter() { public void keyPressed(KeyEvent ke){ if(ke.getKeyCode()==KeyEvent.VK_LEFT){ if(racketX>0) racketX-=10; } if(ke.getKeyCode()==KeyEvent.VK_RIGHT){ if(racketX<TABLE_WIDTH-RACKET_WIDTH) racketX+=10; } } }; f.addKeyListener(keyProcessor); //tableArea.addKeyListener(keyProcessor); ActionListener taskPerformer=evt-> { //小球碰到左边框或右边框 if(ballX<=0||ballX>=TABLE_WIDTH-BALL_SIZE){ xSpeed=-xSpeed; } if(ballY>racketY-BALL_SIZE&&(ballX<racketX||ballX>racketX+RACKET_WIDTH-BALL_SIZE)){ timer.stop(); isLose=true; tableArea.repaint(); }else if(ballY<=0||(ballY>=racketY-BALL_SIZE&&ballX>racketX&&ballX<=racketX+RACKET_WIDTH)){ ySpeed=-ySpeed; } ballY+=ySpeed; ballX+=xSpeed; tableArea.repaint(); if((xSpeed<10&&xSpeed>-10)&&(ySpeed<10&&ySpeed>-10)){ time_times++; } if(time_times==10){ if(xSpeed>0){ xSpeed++; }else{ xSpeed--; } if(ySpeed>0){ ySpeed++; }else{ ySpeed--; } time_times-=10; System.out.println(xSpeed+" "+ySpeed); } }; timer=new Timer(100,taskPerformer); timer.start(); f.pack(); f.setVisible(true); } class MyCanvas extends Canvas { public void paint(Graphics g){ if(isLose){ g.setColor(new Color(255,0,0)); g.setFont(new Font("Times",Font.BOLD,30)); g.drawString("游戏结束",50,200); }else{ g.setColor(new Color(240,240,80)); g.fillOval(ballX,ballY,BALL_SIZE,BALL_SIZE); g.setColor(new Color(80,80,200)); g.fillRect(racketX,racketY,RACKET_WIDTH,RACKET_HEIGHT); } } } public static void main(String[] args) { new PinBall().init(); } }
The above is the detailed content of Simple code sharing for realizing pinball game in Java. For more information, please follow other related articles on the PHP Chinese website!