How do I customize JButton icons?

The example below shows you how we can customize the icon for JButton swing components.

package org.kodejava.example.swing;

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

public class JButtonCustomIcon extends JFrame {
    public JButtonCustomIcon() throws HeadlessException {
        initialize();
    }

    private void initialize() {
        setSize(300, 300);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setLayout(new FlowLayout(FlowLayout.LEFT));

        JButton button = new JButton("Press Me!");

        // Below is how we can set various icons for the JButton swing
        // component. There are the default icon, selected, disabled, presed
        // and rollover icons.
        button.setIcon(new ImageIcon("default.png"));
        button.setSelectedIcon(new ImageIcon("selected.png"));
        button.setDisabledIcon(new ImageIcon("disabled.png"));
        button.setDisabledSelectedIcon(new ImageIcon("disabledSelected.png"));
        button.setPressedIcon(new ImageIcon("pressed.png"));
        button.setRolloverIcon(new ImageIcon("rollover.png"));
        button.setRolloverSelectedIcon(new ImageIcon("rolloverSelected.png"));

        getContentPane().add(button);
    }

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

How do I customize JCheckBox icons?

JCheckBox can have a different icon for its states, there are default icon, a selected icon, disabled icon, pressed icon or rollover icon, etc. See the code below and have a try on it.

package org.kodejava.example.swing;

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

public class JCheckBoxCustomIcon extends JFrame {
    public JCheckBoxCustomIcon() throws HeadlessException {
        initialize();
    }

    private void initialize() {
        setSize(300, 300);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setLayout(new FlowLayout(FlowLayout.LEFT));

        // Creating checkbox with text label
        JCheckBox checkBox = new JCheckBox("Check me!");
        checkBox.setSelected(true);

        // Set default icon for checkbox
        checkBox.setIcon(new ImageIcon("icon.png"));
        // Set selected icon when checkbox state is selected
        checkBox.setSelectedIcon(new ImageIcon("selectedIcon.png"));
        // Set disabled icon for checkbox
        checkBox.setDisabledIcon(new ImageIcon("disabledIcon.png"));
        // Set disabled-selected icon for checkbox
        checkBox.setDisabledSelectedIcon(new ImageIcon("disabledSelectedIcon.png"));
        // Set checkbox icon when checkbox is pressed
        checkBox.setPressedIcon(new ImageIcon("pressedIcon.png"));
        // Set icon when a mouse is over the checkbox
        checkBox.setRolloverIcon(new ImageIcon("rolloverIcon.png"));
        // Set icon when a mouse is over a selected checkbox
        checkBox.setRolloverSelectedIcon(new ImageIcon("rolloverSelectedIcon.png"));

        getContentPane().add(checkBox);
    }

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

How do I create JLabel with an image icon?

To create a JLabel with an image icon we can either pass an ImageIcon as a second parameter to the JLabel constructor or use the JLabel.setIcon() method to set the icon.

package org.kodejava.example.swing;

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

public class JLabelWithIcon extends JFrame {
    public JLabelWithIcon() throws HeadlessException {
        initialize();
    }

    private void initialize() {
        setSize(300, 300);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setLayout(new FlowLayout(FlowLayout.LEFT));

        Icon icon = new ImageIcon("ledgreen.png");
        JLabel label1 = new JLabel("Full Name :", icon, JLabel.LEFT);

        JLabel label2 = new JLabel("Address :", JLabel.LEFT);
        label2.setIcon(new ImageIcon("ledyellow.png"));

        getContentPane().add(label1);
        getContentPane().add(label2);
    }

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

How do I display an image in JButton?

package org.kodejava.example.swing;

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

public class ButtonImageExample extends JFrame {
    public ButtonImageExample() {
        initComponents();
    }

    private void initComponents() {
        setTitle("My Buttons");
        setSize(200, 200);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        getContentPane().setLayout(new FlowLayout(FlowLayout.CENTER));

        // Creates two JButton object with an images to display. The image can be
        // a gif, jpeg, png and some other type supported. And we also set the
        // mnemonic character of the button for short-cut key.
        JButton okButton = new JButton("OK", new ImageIcon("ok.png"));
        okButton.setMnemonic('O');
        JButton cancelButton = new JButton("Cancel", new ImageIcon("cancel.png"));
        cancelButton.setMnemonic('C');

        getContentPane().add(okButton);
        getContentPane().add(cancelButton);
    }

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

JButton with ImageIcon