Java弹球小游戏

本是古典何须时尚 2024-04-01 13:43 9阅读 0赞

## Java弹球小游戏 ##

![在这里插入图片描述][236bf24120dd4a0ba9339aceec27ac8a.png]

下面是小游戏的源码：

Stage5.class

package gui;
    
    import javax.swing.JFrame;
    import java.awt.BorderLayout;
    import java.awt.event.MouseListener;
    import java.awt.event.MouseEvent;
    import java.util.Random;
    import java.awt.Color;
    public class Stage5 extends Thread implements MouseListener
    {
        
        JFrame jf=new JFrame("Bouncing Ball");           //window
        Pad p=new Pad();                                 //canvas to draw sth.
        Ball tmp=null;
        int size=450;                                    //default size of window
        int life=500;                                    //default simulation times
        int interval=100;                                //for thread sleep
        int max_r=25;                                    //the maximum radius of the ball
        int max_v=7;                                     //the maximum offset of the ball
    
        public Stage5()                                  //constructor
        {
        
            p.addMouseListener(this);
            jf.add(p,BorderLayout.CENTER);
            jf.setSize(this.size,this.size);
            jf.setVisible(true);        
        }
        
        public void run()                                 //for thread usage
        {
        
            for(int i=0;i<this.life;i++)
            {
        
                try{
        
                    this.sleep(this.interval);
                }catch(InterruptedException e){
        }            
                p.updateBall();                           //update all balls' status
                p.update(p.getGraphics());                //repaint all balls
            }
            
        }
        
        public void mouseClicked(MouseEvent e){
                  //mouse action with canvas
            Color tmp=Color.red;
            switch(new Random().nextInt(4)){
                     //get random color
                case 0: tmp=Color.blue;break;
                case 1: tmp=Color.yellow;break;
                case 2: tmp=Color.green;break;            
            }
            p.insertBall(new Ball(                       //create a ball with random attributes, then insert it into queue.
                e.getX(),
                e.getY(),
                new Random().nextInt(this.max_r+3),
                tmp,
                this.max_v/2-new Random().nextInt(this.max_v),
                this.max_v/2-new Random().nextInt(this.max_v)
            ));
        }
        
        public void mouseExited(MouseEvent e){
        
            
        }
        
        public void mouseEntered(MouseEvent e){
        
            
        }
        
        public void mousePressed(MouseEvent e){
        
            
        }
        
        public void mouseReleased(MouseEvent e){
        
            
        }
        
        public static void main(String [] args)
        {
        
            Stage5 s=new Stage5();
            s.start();
        }
    }

Pad.class

package gui;
    
    import java.awt.Canvas;
    import java.awt.Graphics;
    import java.awt.Graphics2D;
    import java.awt.geom.Ellipse2D;
    import java.util.Vector;
    public class Pad extends Canvas           //Pad become a canvas
    {
        
        Vector queue=new Vector();            //queue is a place to contain all balls
        
        public Pad(){
        }                        //empty constructor
        
        public void insertBall(Ball b)        //function to add ball to queue
        {
        
            queue.add(b);
        }    
        
        public void updateBall()              //function to change ball's status
        {
        
            int x,y,xoff,yoff,s=queue.size(); //a set of temporary variables
            Ball tmp=null;
            for(int i=0;i<s;i++)
            {
        
                 tmp=(Ball)queue.get(i);      //get one ball from queue
                 x=tmp.getx();                //get the status of the ball
                 y=tmp.gety();
                 xoff=tmp.getxoff();
                 yoff=tmp.getyoff();
                 if((x+xoff)>400){
                    //if the ball reach the border change its direction,else change its location
                     tmp.setx(400-(x+xoff-400));
                     tmp.setxoff(0-xoff);
                 }else if((y+yoff)>400){
        
                     tmp.sety(400-(y+yoff-400));
                     tmp.setyoff(0-yoff);
                 }else if((x+xoff)<0){
        
                     tmp.setx(0-x-xoff);
                     tmp.setxoff(0-xoff);
                 }else if((y+yoff)<0){
        
                     tmp.sety(0-y-yoff);
                     tmp.setyoff(0-yoff);
                 }else{
                     
                     tmp.setx(x+xoff);                   
                     tmp.sety(y+yoff);
                 }            
             }
        }
        
        public void paint(Graphics g)         //paint the graphic to canvas
        {
        
            this.update(g);
        }
        
        public void update(Graphics g)
        {
        
            Graphics2D g2 = (Graphics2D)g;
            g2.clearRect(0,0,450,450);
            Ball tmp=null;
            int s=queue.size();
            Ellipse2D m=null;
            for(int i=0;i<s;i++)              //draw balls in queue one by one
            {
        
                tmp=(Ball)queue.get(i);                                              //get a ball from queue
                m=new Ellipse2D.Float(tmp.getx(),tmp.gety(),tmp.getr(),tmp.getr());  //create an ellipse represents a ball shape
                g2.setPaint(tmp.getc());                                             //set the color
                g2.fill(m);                                                          //draw and fill the ellipse
            }
        }    
        
    }

Ball.class

package gui;
    
    
    import java.awt.Color;
    public class Ball 
    {
        
        private int x=0;     //coordinate x
        private int y=0;     //coordinate y
        private int r=5;     //radius
        private Color c=null;//color
        private int xoff=1;  //offset x
        private int yoff=1;  //offset y
        
        public Ball()        //constructor1 for default usage
        {
        
            x=0;
            y=0;
            r=5;
            c=Color.red;
            xoff=1;
            yoff=1;
        }
        
        public Ball(int x, int y, int r)          //constructor2
        {
        
            this.x=x;
            this.y=y;
            this.r=r;
            c=Color.red;
            xoff=1;
            yoff=1;
        }
        
        public Ball(int x, int y, int r, Color c,int xoff,int yoff)   //constructor3
        {
        
            this.x=x;
            this.y=y;
            this.r=r;
            this.c=c;
            this.xoff=xoff;
            this.yoff=yoff;
        }
        
        public int getx()
        {
        
            return this.x;
        }
        
        public int gety()
        {
        
            return this.y;
        }
        
        public int getr()
        {
        
            return this.r;
        }
        
        public Color getc()
        {
        
            return this.c;
        }
            
        public int getxoff()
        {
        
            return this.xoff;
        }
        
        public int getyoff()
        {
        
            return this.yoff;
        }
        
        public void setx(int x)
        {
        
            this.x=x;
        }
        
        public void sety(int y)
        {
        
            this.y=y;
        }
        
        public void setr(int r)
        {
        
            this.r=r;
        }
        
        public void setc(Color c)
        {
        
            this.c=c;
        }  
        
        public void setxoff(int xoff)
        {
        
            this.xoff=xoff;
        }
        
        public void setyoff(int yoff)
        {
        
            this.yoff=yoff;
        }
    }

[236bf24120dd4a0ba9339aceec27ac8a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/01/af8c08fae7b74d72848d6519f44def11.png