java_moveball.rar_j2se

import java.awt.*; import javax.swing.*; import java.awt.event.MouseMotionListener; import java.util.EventListener; import java.awt.event.MouseEvent; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; public class red extends JFrame implements MouseMotionListener, ActionListener { redPanel rp=new redPanel(); red(){ //布置窗体 this.setSize(300,400); Container cn=this.getContentPane(); cn.setLayout(new BorderLayout()); //声成显示面板 cn.add(rp,BorderLayout.CENTER); //生成按钮面板 JPanel rb=new JPanel(); cn.add(rb,BorderLayout.SOUTH); rb.setLayout(new FlowLayout()); JButton b1=new JButton("重来"); rb.add(b1); b1.addActionListener(this); this.addMouseMotionListener(this); Thread t = new Thread(rp) ; t.start() ; } public static void main (String args[]){ red r = new red(); r.show(); } public void mouseDragged(MouseEvent e) { rp.mx=e.getX(); rp.my=e.getY(); rp.map[rp.mx-5][rp.my-23]=1; } public void mouseMoved(MouseEvent e) { } public void actionPerformed(ActionEvent e) { rp.reset(); } } class redPanel extends JPanel implements Runnable{ public int map[][]=new int[300][400]; public void reset(){ for(int i=0;i<300;i++){ for (int j=0;j<400;j++){ map[i][j] = 0; } } } public int mx; public int my; WB wb=new WB(); int a =0; int ran = (int)(Math.random()*4); public void paint(Graphics g){ super.paint(g); g.setColor(Color.RED) ; for(int i=0;i<300;i++){ for (int j=0;j<400;j++){ if( map[i][j]==1) g.drawLine(i,j,i,j); // System.out.print("aaaaaaaaaaa"); } } if (a%4==ran){ ran = (int)(Math.random()*4); } g.setColor(Color.BLUE) ; g.fillOval(wb.x,wb.y,wb.r,wb.r); int panduan; if (ran ==0){//向上走 int pan=0; for(int i=0;i<10;i++){ pan=pan+map[wb.x+i][wb.y-1]; } if(pan==0){ wb.pa(ran); } } if (ran==1){//向下走 int pan=0; for(int i=0;i<10;i++){ pan=pan+map[wb.x+i][wb.y+21]; } if(pan==0){ wb.pa(ran); } } if (ran==2){//左 int pan=0; for(int i=0;i<10;i++){ pan=pan+map[wb.x-1][wb.y+i]; } if(pan==0){ wb.pa(ran); } } if (ran==3){//右 int pan=0; for(int i=0;i<10;i++){ pan=pan+map[wb.x+21][wb.y+i]; } if(pan==0){ wb.pa(ran); } } a++; } public void run(){ while(true){ try{ Thread.sleep(10) ; }catch(Exception e){} this.repaint() ; } } } class WB { public int x = 150; public int y = 200; public int r = 20; public void pa (int ran){ if (x>=0&&x<=298&&y>=0&&y<=373){ if (ran ==0 ){//向上走 this.y=this.y-1; } if (ran==1){//向下走 this.y=this.y+1; } if (ran==2){//左 this.x=this.x-1; } if (ran==3){//右 this.x=this.x+1; } } } }