Java Swing GUI

How to Change Font Size in a JButton

In this tutorial, we are going to see how to change font size in a JButton, using the method setFont() of JButton class.

JButton button = new JButton("Click here");
button.setFont(new Font("Arial", Font.BOLD, 18));
  • “Arial” is obviously the name of the font used.
  • “Font.BOLD” means bold text (as opposed to PLAIN or ITALIC).
  • “18” is the font size (using the same numbering system for font size as Microsoft Word).

Java Program to Change Font Size in a JButton:
import javax.swing.*;
import java.awt.*;

public class JButtonExample
  public static void main(String[] args) 
    //create a frame
    JFrame frame = new JFrame("JButton Example");
    //create button
    JButton btn = new JButton("Click here");
    //set button position
    //change font size of JButton
    btn.setFont(new Font("Arial", Font.BOLD, 18));
    //add button to frame


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