How to Change Font Size and Font Style of a JLabel

In this tutorial, we are going to see how to change the font size and font style of a JLabel in Java Swing. JLabel is an area to display short text or an image, or both, it is a basic GUI component defined in the Java Swing library. A label does not react to input events. Therefore, it cannot get keyboard focus.
 

How to change font size of the JLabel

JLabel label = new JLabel("This is a label!");
label.setFont(new Font("Serif", Font.BOLD, 20));

JFrame frame = new JFrame();
frame.add(label);
frame.setVisible(true);

Output:

 
 

How to change the color of the JLabel

label.setForeground(Color.RED);

Output:

 

How to change the background color of the JLabel

label.setBackground(Color.ORANGE);
label.setOpaque(true);

Output:

 
 

How to center the text in a JLabel

label = new JLabel("This is a label!", SwingConstants.CENTER);

Output:

 

Complete Example: How to Change Font Size and Font Style of a JLabel

import java.awt.*;
import javax.swing.*;

public class StyleJLabel
{
  StyleJLabel()
  {
    JFrame frame = new JFrame();
    frame.setLayout(new GridLayout(4,1));
  
    JLabel label = new JLabel("This is a label!", SwingConstants.CENTER);
    label.setFont(new Font("Serif", Font.BOLD, 20));
    label.setForeground(Color.RED);
    label.setBackground(Color.ORANGE);
    label.setOpaque(true);
  
    frame.add(label); 
    frame.setSize(300,150);
    frame.setVisible(true);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }
   public static void main(String[] args)
   {
     new StyleJLabel();
   }
}

Output:

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