The following is an example to change JButton font dynamically:Exampleimport java.awt.Font; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; public class SwingDemo extends JFrame {    JButton button = new JButton("Change");    int fontSize = 10;    public SwingDemo() {       setSize(500, 400);       setDefaultCloseOperation(EXIT_ON_CLOSE);       add(button);       // changing font size dynamically on button click       button.addActionListener(new ActionListener() {          public void actionPerformed(ActionEvent ev) {             button.setFont(new Font("Dialog", Font.PLAIN, ++fontSize));             button.revalidate();          }       });       setVisible(true);    }    public static void main(String[] args) {       new SwingDemo();    } }OutputClick “Change” button above to change the font:

Let us first set a JButton:JButton btn = new JButton("DemoButton");Now, attach action listener:btn.addActionListener(new ClickListener());If you have an ActionListener attached to your button it'll fire when you call the method doClick():btn.doClick();The following is an example to call JButton doClick() method to simulate a click action:Exampleimport java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JOptionPane; public class SwingDemo {    public static void main(final String args[]) {       JButton btn = new JButton("DemoButton");       btn.addActionListener(new ClickListener());       JOptionPane.showMessageDialog(null, btn);       btn.doClick();    } } class ClickListener implements ActionListener {    public void actionPerformed(ActionEvent e) {   ... Read More

With set action command, here we are displaying a message in the console on the click of a button.Set the button first:JButton btn = new JButton("Demo Button");Now, set Action Listener to fire when the button is clicked:ActionListener actionListener = new ActionListener() {    public void actionPerformed(ActionEvent event) {       String str = event.getActionCommand();       System.out.println("Clicked = " + str);    } };The following is an example to set action command to JButton:Exampleimport java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JOptionPane; public class SwingDemo {    public static void main(final String args[]) {       JButton btn ... Read More

For Button border, use createLineBorder() method in Java, which allows you to set the color of the Border as well:JButton button = new JButton("Demo Button!"); Border border = BorderFactory.createLineBorder(Color.BLUE);The following is an example to change button border in Java:Exampleimport java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.border.Border; public class SwingDemo {    public static void main(String args[]) {       JFrame frame = new JFrame("Button Border");       Container container = frame.getContentPane();       JButton button = new JButton("Demo Button!");       Border border = BorderFactory.createLineBorder(Color.BLUE);       button.setBorder(border);   ... Read More

The following is an example to add action listener to Button:Examplepackage my; import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingDemo {    private JFrame frame;    private JLabel headerLabel;    private JLabel statusLabel;    private JPanel controlPanel;    public SwingDemo(){       prepareGUI();    }    public static void main(String[] args){       SwingDemo swingControlDemo = new SwingDemo();       swingControlDemo.showButtonDemo();    }    private void prepareGUI(){       frame = new JFrame("Java Swing");       frame.setSize(500, 500);       frame.setLayout(new GridLayout(3, 1));       frame.addWindowListener(new WindowAdapter() {         ... Read More

Yes, we can get the supported image types with ImageIO class in Java. The following is an example to get supported image types in Java:Examplepackage my; import javax.imageio.ImageIO; public class SwingDemo {    public static void main(String[] args) throws Exception {       String[] imgTypes = ImageIO.getReaderFileSuffixes();       System.out.print("Supported Image Types = ");       for (String type : imgTypes) {          System.out.print("" + type);       }    } }OutputSupported Image Types = jpg tif tiff bmp gif png wbmp jpeg

Here, we are creating soft beven border on JComboBox:JComboBox comboBox = new JComboBox(list);Now, set bevel border:comboBox.setBorder(new SoftBevelBorder(BevelBorder.LOWERED));The following is an example to use soft bevel border in Swing:Exampleimport java.awt.Font; import java.awt.GridBagLayout; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.border.BevelBorder; import javax.swing.border.SoftBevelBorder; public class SwingDemo {    static final String list[] = { "One", "Two", "Three", "Four", "Five", "Six" };    public static void main(String[] args) {       JFrame window = new JFrame("ComboBox Example");       JPanel panel = new JPanel();       panel.setLayout(new GridBagLayout());       JComboBox comboBox = new JComboBox(list);       comboBox.setBorder(new ... Read More

Llet us first create a JPanel and set titled border:JPanel panel = new JPanel(); panel.setBorder(BorderFactory.createTitledBorder("Demo Panel"));Now to create Empty Border:JPanel panel2 = new JPanel(new BorderLayout()); panel2.add(panel, BorderLayout.CENTER); panel2.setBorder(BorderFactory.createEmptyBorder(100, 100, 100, 100));The following is an example to leave space with EmptyBorder in Java Swing:Exampleimport java.awt.BorderLayout; import java.awt.Dimension; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JPanel; public class SwingDemo {    public static void main(String[] args) {       JPanel panel = new JPanel();       panel.setBorder(BorderFactory.createTitledBorder("Demo Panel"));       JPanel panel2 = new JPanel(new BorderLayout());       panel2.add(panel, BorderLayout.CENTER);       panel2.setBorder(BorderFactory.createEmptyBorder(100, 100, 100, 100));       ... Read More

Let us first create a Frame:JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setUndecorated(true);Now, create rounded borders:double x = 50; double y = 50; frame.setShape(new RoundRectangle2D.Double(x, y, 100, 100, 50, 50));The following is an example to create rounded borders in Swing:Exampleimport java.awt.geom.RoundRectangle2D; import javax.swing.JFrame; import javax.swing.JPanel; public class SwingDemo extends JPanel {    public static void main(String[] args) {       JFrame frame = new JFrame();       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);       frame.setUndecorated(true);       double x = 50;       double y = 50;       frame.setShape(new RoundRectangle2D.Double(x, y, 100, 100, 50, 50));     ... Read More

To set Titled Border to Panel, let us first create a Panel for our Java Swing Application:JPanel panel = new Jpanel(new BorderLayout());Now, set the titled border:panel.setBorder(new TitledBorder("Displaying Titled Border"));The following is an example to add Titled Border to Panel in Swing:Exampleimport java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.border.TitledBorder; public class SwingDemo {    public static void main(String[] args) {       JPanel panel = new JPanel(new BorderLayout());       panel.setBorder(new TitledBorder("Displaying Titled Border"));       panel.add(new JButton("Demo Button"), BorderLayout.SOUTH);       JOptionPane.showMessageDialog(null, panel);    } }OutputRead More