gamepanel.java

一个用java编的打地鼠的游戏

//********************************************************************
//  GamePanel.java       Author: yj_hu
//
//  Demonstrates a basic componenet hierarchy.
//  It conclude subpanels which regards as 9 holes in the game,
//  then add some labels and buttons to make the applications more friendly,
//  and after that add the mouselistener and the timer function.
//********************************************************************

import javax.swing.*;
import java.awt.event.*;
import java.util.Random;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;//import all the classes I need in this program

public class GamePanel extends JPanel
{
   private Circle circle1;
   private Circle circle2;
   private Circle circle3;
   private Circle circle4;
   private Circle circle5;
   private Circle circle6;
   private Circle circle7;
   private Circle circle8;
   private Circle circle9;//create 9 objects of the Circle class
   
   private final int WIDTH = 400, HEIGHT = 300;//set the width and height of the panel
   private final int DELAY = 1000, IMAGE_SIZE = 66;//set the delay time and the size of the image

   private ImageIcon image;//create the object of the picture
   private Timer timer;//create Timer object
   private int x, y;//normal variables
   private JButton start;//create button object
   
   private Point point1=null;//initial the point as null
   
   private int count;//declare a variable
   private int lose;//decleare a variable
   
   private JLabel label1;
   private JLabel label2;
   private JLabel label3;//create 3 label objects
   
   
   //-----------------------------------------------------------------
   //  Constructor: Creates nine Circle objects also the size and color of the background
   //-----------------------------------------------------------------
   public GamePanel()
   {
      circle1 = new Circle (100, Color.white, 10,10);
      circle2 = new Circle (100, Color.white, 110, 10);
      circle3 = new Circle (100, Color.white, 210, 10);
      circle4 = new Circle (100, Color.white, 10, 110);
      circle5 = new Circle (100, Color.white, 110, 110);
      circle6 = new Circle (100, Color.white, 210, 110);
      circle7 = new Circle (100, Color.white, 10, 210);
      circle8 = new Circle (100, Color.white, 110, 210);
      circle9 = new Circle (100, Color.white, 210, 210);//define the radium and color and position of each circle 
      
      setPreferredSize (new Dimension(400, 400));//set the fitful size for the panel
      setBackground (Color.pink);//set the color of panel background
         
      timer = new Timer(DELAY, new GameListener());//create new object of timer

      image = new ImageIcon ("picture.gif");//reference the picture I will use in the program
      
      start=new JButton("Start");//create the Start button
      start.addActionListener(new GameListener());//add the Gamelistener
      
      GameListener listener = new GameListener();//create new listener
      addMouseListener (listener);//add the mouse listener
      addMouseMotionListener (listener);//add the mouse motion listener
      
      lose=0;
      count=0;//initialization of the two variables
      label1=new JLabel ("you have got "+count+" mice!");
      label2=new JLabel("you have lost "+lose+ "mice!");
      //fill the labels with the words that will appear on the screen
      
      add(label1);
      add(label2);//add the two labels
      add(start);//add the start button
   }

   //-----------------------------------------------------------------
   //  Draws this panel by requesting that each circle draw itself.
   //-----------------------------------------------------------------
   public void paintComponent (Graphics page)
   {
	  super.paintComponent(page);//inherite the super class
	  
	  circle1.draw(page);
      circle2.draw(page);
      circle3.draw(page);
      circle4.draw(page);
      circle5.draw(page);
      circle6.draw(page);
      circle7.draw(page);
      circle8.draw(page);
      circle9.draw(page);//draw 9 circles
      
      image.paintIcon (this, page, x, y);//make sure the position of the image
   }
   
   
   //***********************************************************************************
   //  Represents the action listener for the timer,mouse event and label and also button
   //*****************************************************************
   private class GameListener implements ActionListener,MouseListener,MouseMotionListener
      {
         //--------------------------------------------------------------
         //  Updates the position of the image  whenever the timer fires an action event.
         //--------------------------------------------------------------
         public void actionPerformed (ActionEvent event)
         {
        	 timer.start();//start the game by using timer class
        	 
        	 Random generator=new Random();//create a generator to get random numbers  	 
        	 int number;//create a random number to locate a position of the picture
        	 number=generator.nextInt(9)+1;//create random numbers from 1 to 9
        	 
             //the following steps are at the purpose of 
        	 //matching each random number with the position we had on the screen
        	 //that is to say, if the generator has the number of 1,
        	 //the image will appear on the first circle;
        	 //if it has the number of 2, 
        	 //the image will appear on the second circle and so on;
        	 //the position has to be confirm by the number of coordinate x and y
        	 if(number==1)
        	 {
        		 x=30;
        		 y=30;
        	 }
        	 else
        		 if(number==2)
        		 {
        		 x=130;
        		 y=30;
        		 }
        		 else
        			 if(number==3)
        			 {
        				 x=230;
        		         y=30;
        		         }
        			 else
        				 if(number==4)
        				 {
        					 x=30;
        		             y=130;
        		             }
        				 else
        					 if(number==5)
        					 {
        						 x=130;
        						 y=130;
        						 }
        					 else
        						 if(number==6)
        						 {       						
        							 x=230;
        				      		 y=130;
        				      		 }
        						 else
        							 if(number==7)
        							 {
        								 x=30;
        						         y=230;
        						         }
        							 else
        								 if(number==8){       	
        	 								 x=130;
        	                            	 y=230;
        	                            	 }
        								 else
        								 {
        									 x=230;
        									 y=230;
        									 }
        
           
        	 repaint();
        	 //after the match I have to repaint the image
        	 //in order to make it appear one by oneon the screen
         }
         
         
         //--------------------------------------------------------------
         //  Captures the initial position at which the mouse button is
         //  pressed.
         //--------------------------------------------------------------
         public void mousePressed (MouseEvent event)//the definition of the mousePressed event method
         {
            
       	  point1 = event.getPoint();//get the coordinate of the point of x and y
       	  
       	  if(point1.x>x&&point1.x<x+66&&point1.y>y&&point1.y<y+66)
       		  //determine whether the mousepress is in the range of the picture
       		  { 
       		  count+=1;
              //if the mouse press the picture exactly ,I record the number of success mousepress
       		  
       		  label1.setText("you have got "+count+" mice!");
       		  //set some words on label1 and display the words on the screen
       		  }
       	  else
       		  //if the mouse fails to press on the appeared picture
       		  {
       		  lose+=1;
       		  //I also record the number of failure mousepress
       		  
       	      label2.setText("you have lost "+lose+" mice!");
         	  // set some words on label2 and display the words on the screen
       	      //these words just help the player to understand the game rules
       	      
       	      if(lose==5)//if you fail 5 times,you lose the game and the timer class stop working
       	         {
       	    	  timer.stop();//stop 
       	    	  
       	          label3=new JLabel();//another object of label
       	          add(label3);//add this label
       	          label3.setText("you failed...please press start to replay the game");
       	          //when you fail 5 times, the words will apprea on the screen to 
       	          //tell that you failed and you have to press the button to start again if you like
       	          }
       	      }
       	  
       	  
         }
         
         //--------------------------------------------------------------
         //  Provide empty definitions for unused event methods.
         //--------------------------------------------------------------
         public void mouseDragged (MouseEvent event){}
         public void mouseClicked (MouseEvent event) {}
         public void mouseReleased (MouseEvent event) {}
         public void mouseEntered (MouseEvent event) {}
         public void mouseExited (MouseEvent event) {}
         public void mouseMoved (MouseEvent event) {}

      }
      
   }