hey guys

i am developing a game...

in which when i press a button it has to change its color...

so , i created button, used action listener to it...

if(ae.getActionCommand().equals("b1"))        // here b1 is the button
	{
		b1.setBackground(Color.black);
		frame.invalidate();
		frame.validate();
		System.out.println("button b1 pressed...!!!");
	}

i also used

panel.revalidate();
repaint();

but of no use.....

so what to do.... please suggest any idea for this...

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.image.BufferedImage;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Random;
import javax.swing.*;
//http://stackoverflow.com/questions/7943584/update-jlabel-every-x-seconds-from-arraylistlist-java
public class ButtonsIcon extends JFrame implements Runnable {

    private static final long serialVersionUID = 1L;
    private Queue<Icon> iconQueue = new LinkedList<Icon>();
    private JLabel label = new JLabel();
    private Random random = new Random();
    private JPanel buttonPanel = new JPanel();
    private JPanel labelPanel = new JPanel();
    private Timer backTtimer;
    private Timer labelTimer;
    private JLabel one = new JLabel("one");
    private JLabel two = new JLabel("two");
    private JLabel three = new JLabel("three");
    private final String[] petStrings = {"Bird", "Cat", "Dog",
        "Rabbit", "Pig", "Fish", "Horse", "Cow", "Bee", "Skunk"};
    private boolean runProcess = true;
    private int index = 1;
    private int index1 = 1;

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

            @Override
            public void run() {
                ButtonsIcon t = new ButtonsIcon();
            }
        });
    }

    public ButtonsIcon() {
        iconQueue.add(UIManager.getIcon("OptionPane.errorIcon"));
        iconQueue.add(UIManager.getIcon("OptionPane.informationIcon"));
        iconQueue.add(UIManager.getIcon("OptionPane.warningIcon"));
        iconQueue.add(UIManager.getIcon("OptionPane.questionIcon"));

        one.setFont(new Font("Dialog", Font.BOLD, 24));
        one.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        two.setFont(new Font("Dialog", Font.BOLD, 24));
        two.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        three.setFont(new Font("Dialog", Font.BOLD, 10));
        three.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        labelPanel.setLayout(new GridLayout(0, 3, 4, 4));

        labelPanel.add(one);
        labelPanel.add(two);
        labelPanel.add(three);
        //labelPanel.setBorder(new LineBorder(Color.black, 1));
        labelPanel.setOpaque(false);

        JButton button0 = createButton();
        JButton button1 = createButton();
        JButton button2 = createButton();
        JButton button3 = createButton();

        buttonPanel.setLayout(new GridLayout(0, 4, 4, 4));
        buttonPanel.add(button0);
        buttonPanel.add(button1);
        buttonPanel.add(button2);
        buttonPanel.add(button3);
        //buttonPanel.setBorder(new LineBorder(Color.black, 1));
        buttonPanel.setOpaque(false);

        label.setLayout(new BorderLayout());
        label.add(labelPanel, BorderLayout.NORTH);
        label.add(buttonPanel, BorderLayout.SOUTH);
        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
        label.setPreferredSize(new Dimension(d.width / 3, d.height / 3));

        add(label, BorderLayout.CENTER);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        pack();
        setVisible(true);
        startBackground();
        startLabel2();
        new Thread(this).start();
        printWords(); // generating freeze Swing GUI durring EDT
    }

    private JButton createButton() {
        JButton button = new JButton();
        button.setBorderPainted(false);
        button.setBorder(null);
        button.setFocusable(false);
        button.setMargin(new Insets(0, 0, 0, 0));
        button.setContentAreaFilled(false);
        button.setIcon(nextIcon());
        button.setRolloverIcon(nextIcon());
        button.setPressedIcon(nextIcon());
        button.setDisabledIcon(nextIcon());
        nextIcon();
        return button;
    }

    private Icon nextIcon() {
        Icon icon = iconQueue.peek();
        iconQueue.add(iconQueue.remove());
        return icon;
    }

    // Update background at 4/3 Hz
    private void startBackground() {
        backTtimer = new javax.swing.Timer(750, updateBackground());
        backTtimer.start();
        backTtimer.setRepeats(true);
    }

    private Action updateBackground() {
        return new AbstractAction("Background action") {

            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                label.setIcon(new ImageIcon(getImage()));
            }
        };
    }

    // Update Label two at 2 Hz
    private void startLabel2() {
        labelTimer = new javax.swing.Timer(500, updateLabel2());
        labelTimer.start();
        labelTimer.setRepeats(true);
    }

    private Action updateLabel2() {
        return new AbstractAction("Label action") {

            private static final long serialVersionUID = 1L;

            @Override
            public void actionPerformed(ActionEvent e) {
                two.setText(petStrings[index]);
                index = (index + 1) % petStrings.length;
            }
        };
    }

    // Update lable one at 3 Hz
    @Override
    public void run() {
        while (runProcess) {
            SwingUtilities.invokeLater(new Runnable() {

                @Override
                public void run() {
                    one.setText(petStrings[index1]);
                    index1 = (index1 + 1) % petStrings.length;
                }
            });
            try {
                Thread.sleep(300);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    // Note: blocks EDT
    private void printWords() {
        for (int i = 0; i < petStrings.length; i++) {
            String word = petStrings[i].toString();
            System.out.println(word);
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            three.setText(word);
        }
        three.setText("<html> Concurency Issues in Swing<br>"
                + " never to use Thread.sleep(int) <br>"
                + " durring EDT, simple to freeze GUI </html>");
    }

    public BufferedImage getImage() {
        int w = label.getWidth();
        int h = label.getHeight();
        GradientPaint gp = new GradientPaint(0f, 0f, new Color(
                127 + random.nextInt(128),
                127 + random.nextInt(128),
                127 + random.nextInt(128)),
                w, w,
                new Color(random.nextInt(128), random.nextInt(128), random.nextInt(128)));
        BufferedImage bi = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
        Graphics2D g2d = bi.createGraphics();
        g2d.setPaint(gp);
        g2d.fillRect(0, 0, w, h);
        g2d.setColor(Color.BLACK);
        return bi;
    }
}
Member Avatar

hfx642

If you are using Windows...
At one point, Windows (I think XP and earlier) did NOT allow you to change the colour of the buttons. Only the text.
I don't know if Windows (Vista and W7) will allow you to change the colour of the buttons now.