Dynamically update the appearance of a component : JButton « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JButton

import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;

public class Main extends JFrame {
  final JButton b = new JButton("Add");
  int size = 10;
  public Main() {
    setSize(300, 150);
    setDefaultCloseOperation(EXIT_ON_CLOSE);
    setLayout(new FlowLayout());
    add(b);
    b.addActionListener(new ActionListener() {
      
      public void actionPerformed(ActionEvent ev) {
        b.setFont(new Font("Dialog", Font.PLAIN, ++size));
        b.revalidate();
      }
    });
    setVisible(true);
  }

  public static void main(String[] args) {
    new Main();    
  }
}

14.5.JButton
	14.5.1.	Creating a JButton
	14.5.2.	Creating a JButton from an Action object
	14.5.3.	Using Mnemonics
	14.5.4.	Displaying Mnemonics in Button text
	14.5.5.	Adding Icon to JButton
	14.5.6.	Adding a Rollover and Pressed Icon to a JButton Component
	14.5.7.	Adding a Disabled Icon to a JButton Component
	14.5.8.	Set pressed icon
	14.5.9.	Setting the Gap Size Between the Label and Icon in a JButton Component
	14.5.10.	Change button Horizontal Text Position
	14.5.11.	Set Rollover Icon and set Rollover Enabled
	14.5.12.	Button with user-draw Image icon
	14.5.13.	Button icons, a default button, HTML in a button,and button mnemonics.
	14.5.14.	Placing Text and Icon together
	14.5.15.	Displaying HTML on JButton
	14.5.16.	Creating a Multiline Label for a JButton Component
	14.5.17.	Lines are left justified. This label text will center the lines
	14.5.18.	Label text italicizes the second line
	14.5.19.	Register two event listeners to JButton
	14.5.20.	Setting the default button
	14.5.21.	Set tooltip for button
	14.5.22.	Call button doClick method to simulate a click action
	14.5.23.	Dynamically update the appearance of a component
	14.5.24.	Customizing a JButton Look and Feel
	14.5.25.	Buttons used in toolbars.
	14.5.26.	Transfer focus from button to button with help of arrows keys.
	14.5.27.	Arrow Button