ghost.java

用Java做的小游戏：Pacman 和小时候玩的吃豆豆一样

import cs101.lang.*;
import java.util.*;
import java.awt.*;
import gaming.*;
public abstract class Ghost extends DummyItem implements ScreenObject
{   
    WalledSquare[][] walls;
    Pacman pacman ;
    boolean  Flag = true;
    public abstract void move();
    public Ghost(int x, int y, Pacman p )
	{
	   super( x, y,java.awt.Color.green,2);
	   pacman = p;
	 }
	public int getX() {
	return x;
    }
    public void setX(int xPos){ 
               x = xPos;
              }  
    public void setY(int yPos){ 
               y = yPos;
              }             
    public int getY() {
	return y; 
    }
    public Color getColor() {
	return this.color;
    }  
    public Image getImage() {
	return this.image;
    }
   
    public void Chase(Pacman p)
    { 
      walls = PacmanBoard.getWalls();
      if(pacman.getX()<x&&!walls[x][y].hasLeftWall())
      x--;//if pacman is at the left of the ghost and there is no wall on the left of the ghost then move to left one step
      else if(pacman.getY()<y&&!walls[x][y].hasUpperWall()) 
      y--;//if pacman is at the uppper of the ghost and there is no wall on the upper of the ghost then move to upper one step
      else if(pacman.getX()>x&&!walls[x][y].hasRightWall()) 
      x++;//if pacman is at the right of the ghost and there is no wall on the right of the ghost then move to right one step
      else if(pacman.getY()>y&&!walls[x][y].hasLowerWall())
      y++;//if pacman is at the lower of the ghost and there is no wall on the lower of the ghost then move to lower one step
        PacmanBoard.repaint();
     } 
}