5 
import java.awt.*;
import java.awt.event.*;

import javax.swing.*;


public class Cards extends JFrame {

private GridLayout grid1;

    JButton []bt=new JButton[52];

    ImageIcon tail=new ImageIcon(getClass().getResource("b1fv.png"));

    ImageIcon ori;

    public Cards(){
        grid1=new GridLayout(7,9,2,2);
        setLayout(grid1);
        for(int i=0;i<bt.length;i++){
            ImageIcon c=new ImageIcon(getClass().getResource(i+1+".png"));
            bt[i]=new JButton(c);
            bt[i].addActionListener(new RatingMouseListener(i));
            add( bt[i]);
        }
    }

    public static void main(String[] args){
        Cards frame=new Cards();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(1400,700);
        frame.setVisible(true);
    }

    private class RatingMouseListener implements ActionListener {
        private  int index=0;


        public RatingMouseListener(int index) {
            this.index = index;

        }




        public void actionPerformed(ActionEvent e) {
              System.out.println("Mouse entered for rating " + index);
            ori=new ImageIcon(getClass().getResource(index+1+".png"));

            if (bt[index].getIcon()==ori)
                bt[index].setIcon(tail);
             else
                bt[index].setIcon(ori);



        }

    }



}

当我运行它时，我希望 ori 和 tail 应该交换。但他们没有。有人能帮我吗？

4

2 回答 2

3

这最好通过描述标签来完成。

基本上，将描述设置为如下图像，如果它们具有相同的描述，则交换它们。

ori.setDescription("ori");
tail.setDescription("tail");

if ("ori".equals((ImageIcon)bt[index].getIcon()).getDescription())
// The rest is how you had it.
于 2012-11-26T01:39:22.980 回答
2

我猜你想要点击时翻转的扑克牌（但我不确定）。同样，我建议您在程序开始时创建一次 ImageIcons。然后，您可以使用 equal(...) 方法或什至在这种情况下使用运算符轻松比较一个图标是否与另一个图标相同==。例如，请查看并运行此代码以获取我的意思的示例：

import java.awt.GridLayout;
import java.awt.event.*;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.imageio.ImageIO;
import javax.swing.*;

public class CardsDeck {
   public static final String RANKS = "a23456789tjqk";
   public static final String SUITS = "cdhs";
   public static final String CARDS_IMG_PATH = "http://math.hws.edu/javanotes/source/cards.png";
   private static final int BACK_RANK = 2;
   private static final int BACK_SUIT = SUITS.length();
   private static final String ICON = "icon";

   private JPanel panel = new JPanel();
   private List<ImageIcon> iconList = new ArrayList<ImageIcon>();
   private ImageIcon cardBack;

   public CardsDeck() {
      try {
         URL imgUrl = new URL(CARDS_IMG_PATH);
         BufferedImage img = ImageIO.read(imgUrl);

         double cardWidth = (double) img.getWidth() / RANKS.length();
         double cardHeight = (double) img.getHeight() / (SUITS.length() + 1);
         int w = (int) cardWidth;
         int h = (int) cardHeight;
         for (int rank = 0; rank < RANKS.length(); rank++) {
            for (int suit = 0; suit < SUITS.length(); suit++) {
               int x = (int) (rank * cardWidth);
               int y = (int) (suit * cardHeight);
               BufferedImage subImg = img.getSubimage(x, y, w, h);
               ImageIcon icon = new ImageIcon(subImg);
               iconList.add(icon);
            }
         }

         int x = (int) (BACK_RANK * cardWidth);
         int y = (int) (BACK_SUIT * cardHeight);
         BufferedImage subImg = img.getSubimage(x, y, w, h);
         cardBack = new ImageIcon(subImg);

         int hgap = 5;
         int vgap = hgap;
         panel.setLayout(new GridLayout(SUITS.length(), RANKS.length(), hgap, vgap));
         panel.setBorder(BorderFactory.createEmptyBorder(vgap, hgap, vgap, hgap));
         MouseListener mouseListener = new MouseAdapter() {
            @Override
            public void mousePressed(MouseEvent e) {
               JLabel label = (JLabel) e.getSource();
               Icon currentIcon = label.getIcon();
               if (currentIcon.equals(cardBack)) {
                  Icon icon = (Icon) label.getClientProperty(ICON);
                  label.setIcon(icon);
               } else {
                  label.setIcon(cardBack);
               }
            }
         };
         Collections.shuffle(iconList);
         for (int i = 0; i < iconList.size(); i++) {
            JLabel label = new JLabel(cardBack);
            label.putClientProperty(ICON, iconList.get(i));
            label.addMouseListener(mouseListener);
            panel.add(label);
         }
      } catch (MalformedURLException e) {
         e.printStackTrace();
         System.exit(-1);
      } catch (IOException e) {
         e.printStackTrace();
         System.exit(-1);
      }
   }

   private JComponent getPanel() {
      return panel;
   }

   private static void createAndShowGui() {
      CardsDeck cardsDeck = new CardsDeck();

      JFrame frame = new JFrame("CardsDeck");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.getContentPane().add(cardsDeck.getPanel());
      frame.pack();
      frame.setLocationByPlatform(true);
      frame.setVisible(true);
   }

   public static void main(String[] args) {
      SwingUtilities.invokeLater(new Runnable() {
         public void run() {
            createAndShowGui();
         }
      });
   }
}

如果运行，它将显示一个 13 x 4 的卡片阵列，可以通过单击它们来翻转它们：

在此处输入图像描述

于 2012-11-26T03:27:06.580 回答