hua_rong_road.java

用JAVA语言编写的华容道程序

import java.awt.*;
import java.applet.*;
import java.awt.event.*;
class People extends Button implements FocusListener //代表华容道人物的类。
{Rectangle rect=null;
int left_x,left_y;//按扭的左上角坐标.
int width,height; //按扭的宽和高.
String name; int number;
People(int number,String s,int x,int y,int w,int h,Hua_Rong_Road road)
   {super(s);
  name=s;this.number=number;
  left_x=x;left_y=y;
  width=w;height=h;  setBackground(Color.orange);
  road.add(this);    addKeyListener(road);
  setBounds(x,y,w,h);addFocusListener(this);
  rect=new Rectangle(x,y,w,h);
 }
 public void focusGained(FocusEvent e)
   { setBackground(Color.red);
   }
 public void focusLost(FocusEvent e)
   { setBackground(Color.orange);
   }
}
public class Hua_Rong_Road extends Applet
 implements KeyListener,ActionListener
{   People people[]=new People[10];
    Rectangle left,right,above ,below;//华容道的边界 .
    Button restart=new Button("重新开始");   
  public void init()
  {setLayout(null); add(restart);
   restart.setBounds(5,5,80,25);
   restart.addActionListener(this);
   people[0]=new People(0,"曹操",104,54,100,100,this); 
   people[1]=new People(1,"关羽",104,154,100,50,this); 
   people[2]=new People(2,"张飞",54, 154,50,100,this); 
   people[3]=new People(3,"刘备",204,154,50,100,this); 
   people[4]=new People(4,"张辽",54, 54, 50,100,this); 
   people[5]=new People(5,"曹仁",204, 54, 50,100,this);  
   people[6]=new People(6,"兵  ",54,254,50,50,this);  
   people[7]=new People(7,"兵  ",204,254,50,50,this); 
   people[8]=new People(8,"兵  ",104,204,50,50,this); 
   people[9]=new People(9,"兵  ",154,204,50,50,this); 
   people[9].requestFocus();
   left=new Rectangle(49,49,5,260);
 people[0].setForeground(Color.white) ;   
   right=new Rectangle(254,49,5,260);
   above=new Rectangle(49,49,210,5);
   below=new Rectangle(49,304,210,5);
 }
 public void paint(Graphics g)
    {//画出华容道的边界:
      g.setColor(Color.cyan);
      g.fillRect(49,49,5,260);//left.
      g.fillRect(254,49,5,260);//right.
      g.fillRect(49,49,210,5); //above.
      g.fillRect(49,304,210,5);//below.
    //提示曹操逃出位置和按键规则:
      g.drawString("点击相应的人物,然后按键盘上的上下左右箭头移动",100,20);
      g.setColor(Color.red);
      g.drawString("曹操到达该位置",110,300);
    }
 public void keyPressed(KeyEvent e) 
    { People man=(People)e.getSource();//获取事件源.
      man.rect.setLocation(man.getBounds().x, man.getBounds().y);
      if(e.getKeyCode()==KeyEvent.VK_DOWN)
        {             man.left_y=man.left_y+50;     //向下前进50个单位。
                      man.setLocation(man.left_x,man.left_y);
                      man.rect.setLocation(man.left_x,man.left_y);
        //判断是否和其它人物或下边界出现重叠,如果出现重叠就退回50个单位距离。       
        for(int i=0;i<10;i++)
            {if((man.rect.intersects(people[i].rect))&&(man.number!=i))
                    {man.left_y=man.left_y-50;
                     man.setLocation(man.left_x,man.left_y);
                     man.rect.setLocation(man.left_x,man.left_y);   
                    }
             }
      if(man.rect.intersects(below))
            { man.left_y=man.left_y-50;
             man.setLocation(man.left_x,man.left_y);
             man.rect.setLocation(man.left_x,man.left_y); 
            } 
       }
   if(e.getKeyCode()==KeyEvent.VK_UP)
     {  man.left_y=man.left_y-50;     //向上前进50个单位。
        man.setLocation(man.left_x,man.left_y);
        man.rect.setLocation(man.left_x,man.left_y);
        //判断是否和其它人物或上边界出现重叠,如果出现重叠就退回50个单位距离。 
        for(int i=0;i<10;i++)
            {if((man.rect.intersects(people[i].rect))&&(man.number!=i))
                    {man.left_y=man.left_y+50;
                     man.setLocation(man.left_x,man.left_y);
                     man.rect.setLocation(man.left_x,man.left_y);   
                    }
             }
        if(man.rect.intersects(above))
            { man.left_y=man.left_y+50;
             man.setLocation(man.left_x,man.left_y);
             man.rect.setLocation(man.left_x,man.left_y); 
            } 
       }
    if(e.getKeyCode()==KeyEvent.VK_LEFT)
       {man.left_x=man.left_x-50;     //向左前进50个单位。
        man.setLocation(man.left_x,man.left_y);
        man.rect.setLocation(man.left_x,man.left_y);
        //判断是否和其它人物或左边界出现重叠,如果出现重叠就退回50个单位距离。
        for(int i=0;i<10;i++)
            {if((man.rect.intersects(people[i].rect))&&(man.number!=i))
                    {man.left_x=man.left_x+50;
                     man.setLocation(man.left_x,man.left_y);
                     man.rect.setLocation(man.left_x,man.left_y);   
                    }
             }
        if(man.rect.intersects(left))
            { man.left_x=man.left_x+50;
             man.setLocation(man.left_x,man.left_y);
             man.rect.setLocation(man.left_x,man.left_y); 
            } 
       }
   if(e.getKeyCode()==KeyEvent.VK_RIGHT)
     {  man.left_x=man.left_x+50;     //向右前进50个单位。
        man.setLocation(man.left_x,man.left_y);
        man.rect.setLocation(man.left_x,man.left_y);
        //判断是否和其它人物或右边界出现重叠,如果出现重叠就退回50个单位距离。
        for(int i=0;i<10;i++)
            {if((man.rect.intersects(people[i].rect))&&(man.number!=i))
                    {man.left_x=man.left_x-50;
                     man.setLocation(man.left_x,man.left_y);
                     man.rect.setLocation(man.left_x,man.left_y);   
                    }
             }
        if(man.rect.intersects(right))
            { man.left_x=man.left_x-50;
             man.setLocation(man.left_x,man.left_y);
             man.rect.setLocation(man.left_x,man.left_y); 
            } 
       }
 }
 public void keyTyped(KeyEvent e){}
 public void keyReleased(KeyEvent e){}
 public void actionPerformed(ActionEvent e)
 { this.removeAll();
   this.init();
 } 
}