如何在 Java 中打乱图像

Question

我从http://zetcode.com/tutorials/javagamestutorial/puzzle/ 找到了这个源代码 我想玩弄它。这是一个图片益智游戏，但是当我运行程序时，它并没有显示为乱码，我想知道我将如何解决这个问题才能让它乱码？我还是编程新手，我只是想玩这个来学习一点。谢谢！

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.CropImageFilter;
import java.awt.image.FilteredImageSource;

import javax.swing.Box;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;


public class Puzzle extends JFrame implements ActionListener {

private JPanel centerPanel;
private JButton button;
private JLabel label;
private Image source;
private Image image;
int[][] pos;
int width, height;

public Puzzle() {

    pos = new int[][] {
                        {0, 1, 2}, 
                        {3, 4, 5}, 
                        {6, 7, 8}, 
                        {9, 10, 11}
                    };


    centerPanel = new JPanel();
    centerPanel.setLayout(new GridLayout(4, 4, 0, 0));

    ImageIcon sid = new ImageIcon(Puzzle.class.getResource("icesid.jpg"));
    source = sid.getImage();

    width = sid.getIconWidth();
    height = sid.getIconHeight();


    add(Box.createRigidArea(new Dimension(0, 5)), BorderLayout.NORTH);    
    add(centerPanel, BorderLayout.CENTER);


    for ( int i = 0; i < 4; i++) {
        for ( int j = 0; j < 3; j++) {
            if ( j == 2 && i == 3) {
                label = new JLabel("");
                centerPanel.add(label);
            } else {
                button = new JButton();
                button.addActionListener(this);
                centerPanel.add(button);
                image = createImage(new FilteredImageSource(source.getSource(),
                    new CropImageFilter(j*width/3, i*height/4, 
                        (width/3)+1, height/4)));
                button.setIcon(new ImageIcon(image));
            }
        }
    }

    setSize(325, 275);
    setTitle("Puzzle");
    setResizable(false);
    setLocationRelativeTo(null);
    setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    setVisible(true);
}


public static void main(String[] args) {

    new Puzzle();

}

public void actionPerformed(ActionEvent e) {
    JButton button = (JButton) e.getSource();
    Dimension size = button.getSize();

    int labelX = label.getX();
    int labelY = label.getY();
    int buttonX = button.getX();
    int buttonY = button.getY();
    int buttonPosX = buttonX / size.width;
    int buttonPosY = buttonY / size.height;
    int buttonIndex = pos[buttonPosY][buttonPosX];



    if (labelX == buttonX && (labelY - buttonY) == size.height ) {

         int labelIndex = buttonIndex + 3;

         centerPanel.remove(buttonIndex);
         centerPanel.add(label, buttonIndex);
         centerPanel.add(button,labelIndex);
         centerPanel.validate();
    }

    if (labelX == buttonX && (labelY - buttonY) == -size.height ) {

         int labelIndex = buttonIndex - 3;
         centerPanel.remove(labelIndex);
         centerPanel.add(button,labelIndex);
         centerPanel.add(label, buttonIndex);
         centerPanel.validate();
    }

    if (labelY == buttonY && (labelX - buttonX) == size.width ) {

         int labelIndex = buttonIndex + 1;

         centerPanel.remove(buttonIndex);
         centerPanel.add(label, buttonIndex);
         centerPanel.add(button,labelIndex);
         centerPanel.validate();
    }

    if (labelY == buttonY && (labelX - buttonX) == -size.width ) {

         int labelIndex = buttonIndex - 1;

         centerPanel.remove(buttonIndex);
         centerPanel.add(label, labelIndex);
         centerPanel.add(button,labelIndex);
         centerPanel.validate();
    }
}
}

Answer 1

1. 创建每个Icon 并将Icon 添加到ArrayList。
2. 那么就可以使用Collections.shuffle(...)方法了
3. 然后遍历改组的ArrayList 并创建您的按钮，将图标添加到每个按钮。

编辑：

显示概念的简单示例：

import java.awt.*;
import java.util.*;
import javax.swing.*;

public class SSCCE extends JPanel
{
    public SSCCE()
    {
        setLayout( new GridLayout(3, 4) );

        ArrayList<Integer> numbers = new ArrayList<Integer>();

        for (int i = 0; i < 12; i++)
            numbers.add( new Integer(i) );

        Collections.shuffle(numbers);

        for (int i = 0; i < 12; i++)
            add( new JLabel( "" + numbers.get(i) ) );
    }

    private static void createAndShowGUI()
    {
        JFrame frame = new JFrame("SSCCE");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new SSCCE());
        frame.setLocationByPlatform( true );
        frame.setSize(300, 300);
        frame.setVisible( true );
    }

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