How to define JRadioButton label position?

In this code snippet you’ll see how to define JRadioButton label position.┬áBy default the label will be displayed on the right side of the button. In the code below you will see some examples for placing the label on the left side, at the top and the bottom of the JRadioButton.

To define the label position we use the combination of the setHorizontalTextPosition() and setVerticalTextPosition() method and specified the position using one of the available constant in SwingConstants interface.

package org.kodejava.example.swing;

import javax.swing.*;

public class RadioButtonLabelPosition {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();

        // Create JRadioButton with label on the right
        JRadioButton button1 = new JRadioButton("Button One");
        button1.setHorizontalTextPosition(SwingConstants.RIGHT);

        // Create JRadioButton with label on the left
        JRadioButton button2 = new JRadioButton("Button Two");
        button2.setHorizontalTextPosition(SwingConstants.LEFT);

        // Create JRadioButton with label at the bottom centered.
        JRadioButton button3 = new JRadioButton("Button Three");
        button3.setVerticalTextPosition(SwingConstants.BOTTOM);
        button3.setHorizontalTextPosition(SwingConstants.CENTER);

        // Create JRadioButton with label at the top centered.
        JRadioButton button4 = new JRadioButton("Button Four");
        button4.setVerticalTextPosition(SwingConstants.TOP);
        button4.setHorizontalTextPosition(SwingConstants.CENTER);

        panel.add(button1);
        panel.add(button2);
        panel.add(button3);
        panel.add(button4);

        frame.add(panel);
        frame.setSize(300, 300);
        frame.pack();
        frame.setVisible(true);
    }
}

Here is a screen capture result of the code snippet above:

JRadioButton Label Position

How do I flash the window taskbar in Swing?

package org.kodejava.example.swing;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class WindowTaskbarFlash extends JFrame {
    public WindowTaskbarFlash() throws HeadlessException {
        initUI();
    }

    private void initUI() {
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        pack();
        setSize(200, 200);
        setState(Frame.ICONIFIED);

        // Demonstrate flashes the application window task bar
        // by calling the toFront method every 5 seconds.
        Timer timer = new Timer(5000, new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                toFront();
            }
        });
        timer.start();
    }

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

How do I change JFrame state programmatically?

In the following code snippet you’ll learn how to programmatically change the frame state of a JFrame component in a Swing application. The JFrame states are represented as a bitwise masks. You can minimize, maximize or make the JFrame state to normal using the JFrame.setExtendedState() method.

You can pass the following values as the parameter to the method:

  • Frame.NORMAL
  • Frame.ICONIFIED
  • Frame.MAXIMIZED_HORIZ
  • Frame.MAXIMIZED_VERT
  • Frame.MAXIMIZED_BOTH
package org.kodejava.example.swing;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class SwingFrameState extends JFrame {
    public SwingFrameState() throws HeadlessException {
        initUI();
    }

    private void initUI() {
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setLayout(new FlowLayout());

        final JButton minimize = new JButton("Minimize");
        final JButton maximize = new JButton("Maximize");
        final JButton normal = new JButton("Normal");

        add(normal);
        add(minimize);
        add(maximize);

        pack();
        setSize(200, 200);

        ActionListener listener = new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (e.getSource() == normal) {
                    setExtendedState(Frame.NORMAL);                    
                } else if (e.getSource() == minimize) {
                    setExtendedState(Frame.ICONIFIED);
                } else if (e.getSource() == maximize) {
                    setExtendedState(Frame.MAXIMIZED_BOTH);
                }
            }
        };

        minimize.addActionListener(listener);
        maximize.addActionListener(listener);
        normal.addActionListener(listener);
    }

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