How can we set the margin to a JButton in Java?

While developing Java Swing applications, you may have cases when you need to modify the space around JButtons to develop attractive applications. In this article, we will learn to set the margin of a JButton in Java.

What is a JButton?

A JButton is a subclass of AbstractButton, and it can be used for adding platform-independent buttons to a Java Swing application. A Button can generate an ActionListener interface when the button is pressed or clicked, it can also generate the MouseListener and KeyListener interfaces.

Syntax

The following is the syntax for JButton initialization:

JButton button = new JButton("Button");

We can set a margin to a JButton by using the setMargin() method of the JButton class.

setMargin() Method

The setMargin() method is a Swing component method used to set the margin between the border and the text of a button. It takes Insets(int top, int left, int bottom, int right) as an argument.

Syntax

The following is the syntax for setMargin() initialization:

Insets margin = new Insets(top, left, bottom, right);
button.setMargin(margin);

Setting the Margin to a JButton

The following are the steps for setting the margin of a JButton in Java:

Sets the window title as "JButtonMargin Test" and sets the layout manager to BorderLayout, which divides the JFrame container into 5 regions.

setTitle("JButtonMargin Test");
setLayout(new BorderLayout());

Creates a new JButton with text "JButton Margin" and sets margins using the setMargin() method with 50px padding on each side of the JButton.

button = new JButton("JButton Margin");
button.setMargin(new Insets(50, 50, 50, 50));

Adds the button to the NORTH region of the BorderLayout:

add(button, BorderLayout.NORTH);

Example

Below is an example of setting the margin of a JButton in Java using the setMargin() method:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class JButtonMarginTest extends JFrame {
   private JButton button;
   public JButtonMarginTest() {
      setTitle("JButtonMargin Test");
      setLayout(new BorderLayout());
      button = new JButton("JButton Margin");
      button.setMargin(new Insets(50, 50, 50, 50));
      add(button, BorderLayout.NORTH);
      setSize(400, 400);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setLocationRelativeTo(null);
      setVisible(true);
   }
   public static void main(String[] args) {
      new JButtonMarginTest();
   }
}

Output