move.java

用JAVA语言编写的最简单的迷宫

import java.awt.event.*;import java.applet.*;
import java.awt.*;
public class Move extends Applet implements KeyListener,ActionListener
{ Button b_go=new Button("go"),
         b_replay=new Button("replay");
  Rectangle rect1,rect2,rect3;
  int b_x=0,b_y=0;
  public void init()
  {b_go.addKeyListener(this);
   b_replay.addActionListener(this);
   setLayout(null);
   //代表迷宫的矩形：
    rect1=new Rectangle(20,40,200,40);
    rect2=new Rectangle(200,40,24,240);
    rect3=new Rectangle(200,220,100,40);
    b_go.setBackground(Color.red);      //代表走迷宫者的按扭。 
    add(b_go);b_go.setBounds(22,45,20,20);
    b_x=b_go.getBounds().x;b_y=b_go.getBounds().y;
     b_go.requestFocus() ;
    add(b_replay);b_replay.setBounds(2,2,45,16);//点击重新开始的按扭。   
  }
  public void paint(Graphics g)
  { //画出迷宫：
    g.setColor(Color.green);
    g.fillRect(20,40,200,40);
    g.setColor(Color.yellow);
    g.fillRect(200,40,40,240);
    g.setColor(Color.cyan);
    g.fillRect(200,220,100,40);
    g.drawString("出口",310,220);
    g.setColor(Color.black);
    g.drawString("点击红色按扭，然后用键盘上的方向键移动按扭",100,20);
  }
 public void keyPressed(KeyEvent e)
 { //按键盘上的上下、左右键在迷宫中行走：
  if((e.getKeyCode()==KeyEvent.VK_UP))
    { //创建一个和按扭：b_go 同样大小的矩形：
      Rectangle rect=new Rectangle(b_x,b_y,20,20);
      //要求必须在迷宫内行走：
      if(rect.intersects(rect1)||rect.intersects(rect2)||
rect.intersects(rect3))
        {b_y=b_y-2;b_go.setLocation(b_x,b_y);}
    }
 else if(e.getKeyCode()==KeyEvent.VK_DOWN)
    { Rectangle rect=new Rectangle(b_x,b_y,20,20);
      if(rect.intersects(rect1)||rect.intersects(rect2)||
rect.intersects(rect3))
       { b_y=b_y+2;b_go.setLocation(b_x,b_y);}
    }
 else if(e.getKeyCode()==KeyEvent.VK_LEFT)
    {  Rectangle rect=new Rectangle(b_x,b_y,20,20);
      if(rect.intersects(rect1)||rect.intersects(rect2)
||rect.intersects(rect3))
         {b_x=b_x-2;b_go.setLocation(b_x,b_y);} 
    } 
 else if(e.getKeyCode()==KeyEvent.VK_RIGHT)
    { Rectangle rect=new Rectangle(b_x,b_y,20,20);
      if(rect.intersects(rect1)||rect.intersects(rect2)||
rect.intersects(rect3))
        { b_x=b_x+2;b_go.setLocation(b_x,b_y);}
    }
 }
 public void keyReleased(KeyEvent e){}
  public void keyTyped(KeyEvent e){}
 public void actionPerformed(ActionEvent e)
  { b_go.setBounds(22,45,20,20); 
b_x=b_go.getBounds().x;b_y=b_go.getBounds().y;
b_go.requestFocus() ;
} 
}