Java Swing Program to demonstrate JButton with Icon

Program

import javax.swing.*;
public class JButtonIconDemo
{
	public static void main(String args[])
	{
		JFrame frm = new JFrame("JButton Demo");
		JButton btnSubmit;
		ImageIcon icoSubmit;
		icoSubmit = new ImageIcon("login.png");
		btnSubmit = new JButton(icoSubmit);
		btnSubmit.setBounds(0, 0, 100, 50);
		frm.add(btnSubmit);
		frm.setSize(300, 300); 
		frm.setLayout(null);
		frm.setVisible(true);
		frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}

This Java Swing program demonstrates how to create a JButton that displays an icon (an image) rather than text. It creates a window (JFrame) with a JButton that contains an image, which can be used as an interactive button in the GUI.

1. Imports:

   • The program imports the javax.swing.* package to use Swing components like JFrame, JButton, and ImageIcon.

2. Creating the JFrame:

   • JFrame frm = new JFrame("JButton Demo"): Creates a frame (window) with the title "JButton Demo".
   • frm.setSize(300, 300): Sets the size of the window to 300x300 pixels.
   • frm.setLayout(null): Disables the default layout manager, allowing manual positioning of the button.
   • frm.setVisible(true): Makes the window visible when the program runs.
   • frm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE): Ensures that the program will terminate when the window is closed.

3. Creating the JButton with an Icon:

   • ImageIcon icoSubmit = new ImageIcon("login.png");: Creates an ImageIcon from the file "login.png". This image file should exist in the directory where the program is running.
   • btnSubmit = new JButton(icoSubmit);: Creates a JButton and sets its icon to the previously created ImageIcon. The text of the button is omitted, and only the image is displayed on the button.
   • btnSubmit.setBounds(0, 0, 100, 50);: Sets the position and size of the button within the frame. The button is placed at the coordinates (0, 0) on the frame and has a width of 100 pixels and height of 50 pixels.

4. Adding the JButton to JFrame:

   • frm.add(btnSubmit);: Adds the button to the frame so that it will appear in the GUI.

5. Key Swing Methods Used:

   • ImageIcon("imagePath"): This creates an image icon from the specified image file path (e.g., "login.png"). Ensure the image is in the correct directory for the program to locate it.
   • JButton(Icon icon): This creates a JButton with the specified icon. In this case, instead of setting the text of the button, the image is displayed.
   • setBounds(x, y, width, height): This method sets the position and size of the button on the frame. The button is placed at (0, 0) and has a width of 100 pixels and a height of 50 pixels.
   • add(Component component): Adds the button to the frame so that it is displayed in the GUI.

Output