從使用鼠標監聽器選擇的對象中獲取信息

Question

所以基本上我試圖使Set Card遊戲的想法是從4x3棋盤中選擇3張牌，以確定它們是否匹配或全部相反並顯示消息。我製作了這些卡片，並且它們都具有陰影，形狀，顏色和數量的價值。我遇到的問題是當我點擊卡時，我可以將其刪除。我想要做的是點擊一張2紅色虛線波形的卡片，並將其返回2,1,2,3並將其添加到每個卡片上。然後在選擇三張牌之後確定它們是否匹配。我甚至不知道如何去做這件事。我真正嘗試過的唯一一件事就是將我點擊的卡片保存到一個新的對象上。

package assignment3; 
import acm.program.GraphicsProgram; 
import acm.graphics.*; 

import java.awt.event.MouseEvent; 
import java.util.Random; 

public class SetGame extends GraphicsProgram 
{ 
    private int APP_WIDTH = 470; 
    private int APP_HEIGHT = 300; 
    GObject Card[][]; 

    public void run() 
    { 
     setSize(APP_WIDTH,APP_HEIGHT); 

     for(int row = 0;row < 3; row++) 
     { 
      for(int col = 0; col < 4; col++) 
      { 
       Card[][] setCard = new Card[4][3]; 
       setCard[col][row] = new Card(col*60, row*60, getRandomNum()+1,getRandomNum()+1,getRandomNum()+1,getRandomNum()+1); 
       add(setCard[col][row]); 
      } 
      println(); 
     } 
     addMouseListeners(); 
    } 


    public int getPigment(int num) 
    { 
     int pigment = num; 
     String[] color = new String[3];  
     color[0] = "red"; 
     color[1] = "green"; 
     color[2] = "purple"; 
     return pigment;  
    } 

    //gets a random shape 
    public int getShape(int num) 
    { 
     int shape = num; 
     String[] Shape = new String[3];  
     Shape[0] = "circle"; 
     Shape[1] = "diamond"; 
     Shape[2] = "squiggle"; 
     return shape;   
    } 

    public int getShade(int num) 
    { 
     int shade = num; 
     String[] Shade = new String[3];  
     Shade[0] = "solid"; 
     Shade[1] = "dashed"; 
     Shade[2] = "hollow"; 
     return shade; 
    } 

    public int getRandomNum() 
    { 
     Random number = new Random(); 
     int num = number.nextInt(3); 
     return num; 
    } 


    public void mouseClicked(MouseEvent e) 
    { 
     GObject whichCard = getElementAt(e.getX(), e.getY()); 
     if(whichCard == null)return; 
     remove(whichCard); 
    } 

} 

這裏是對其他類

package assignment3; 
import java.awt.Image; 
import java.awt.Toolkit; 
import java.util.Random; 

import acm.program.GraphicsProgram; 
import acm.graphics.*; 

//Written by Dan Mattwig 
//This program is built to display properties for cards 

public class Card extends GCompound 
{  
    private int color; 
    private int shape; 
    private int shading; 
    private int number; 


    public Card(int X,int Y,int color,int shape, int shading, int number) 
    { 
     setLocation(X,Y); 
     this.color = color; 
     this.shape = shape; 
     this.shading = shading; 
     this.number = number; 
     int image = (color * 3) + (shape * 9) + (shading * 27) + (number - 39); 
     GImage card = new GImage("images/"+image+".gif"); 
     add(card,X,Y);  
    } 




} 

Answer 1

點擊時，你將需要確定事件的源表示Card的構造，例如...

if (whichCard instanceof Card) { 
    ... 
} 

然後，您將需要確定的Card屬性，但你沒有提供任何手段來做到這一點。您將需要提供一系列干將，所以你可以得到你所需要的信息，例如...

public int getColor() { 
    return color; 
} 

public int getShape() { 
    return shape; 
} 

public int getShading() { 
    return shading; 
} 

public int getNumber() { 
    return number; 
} 

在這一點上，你需要開始進行決策。您可以將每個Card添加到某種List，因爲它會被點擊並在稍後階段處理，或者在點擊時進行比較，這取決於您。

無論如何，我會嘗試使用Comparable接口...