Java JLabel Class Example

JLABELS

Java Swing Tutorial Explaining the JLabel Component. JLabel, descended from JComponent, is used to
create text labels.
A JLabel object provides text instructions or information on a GUI — display a single line of read-only text, an image or both text and image.
We use a Swing JLabel when we need a user interface component that displays a message or an image.
JØLabels

  • Provide text instructions on a GUI
  • lRead-only text
  • lPrograms rarely change a label’s contents
  • lClass JLabel (subclass of JComponent)

JLABEL Example

import java.awt.GridLayout;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.ImageIcon;

public class JlabelDemo extends JPanel {

	JLabel jlbLabel1, jlbLabel2, jlbLabel3;
	public JlabelDemo() {
		ImageIcon icon = new ImageIcon("java-swing-tutorial.JPG",
				"My Website");
		// Creating an Icon
		setLayout(new GridLayout(3, 1));
		// 3 rows, 1 column Panel having Grid Layout
		jlbLabel1 = new JLabel("Image with Text", icon, JLabel.CENTER);
		// We can position of the text, relative to the icon:
		jlbLabel1.setVerticalTextPosition(JLabel.BOTTOM);
		jlbLabel1.setHorizontalTextPosition(JLabel.CENTER);
		jlbLabel2 = new JLabel("Text Only Label");
		jlbLabel3 = new JLabel(icon); // Label of Icon Only
		// Add labels to the Panel
		add(jlbLabel1);
		add(jlbLabel2);
		add(jlbLabel3);
	}
	public static void main(String[] args) {
		JFrame frame = new JFrame("jLabel Usage Demo");
		frame.addWindowListener(new WindowAdapter() {

			// Shows code to Add Window Listener
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
		frame.setContentPane(new JlabelDemo());
		frame.pack();
		frame.setVisible(true);
	}
}

Output

Download jLabel Source Code

JAVA JLABEL HIERARCHY

javax.swing
Class JLabel
java.lang.Object
java.awt.Component
java.awt.Container
javax.swing.JComponent
javax.swing.JLabel

All Implemented Interfaces: 
Accessible, ImageObserver, MenuContainer, Serializable, SwingConstants
Direct Known Subclasses: 
BasicComboBoxRenderer, DefaultListCellRenderer, DefaultTableCellRenderer, DefaultTreeCellRenderer

JLABEL CONSTRUCTOR

JLabel()
Creates a JLabel instance with no image and with an empty string for the title.

JLabel(Icon image)
Creates a JLabel instance with the specified image.

JLabel(Icon image, int horizontalAlignment)
Creates a JLabel instance with the specified image and horizontal alignment.

JLabel(String text)
Creates a JLabel instance with the specified text.

JLabel(String text, Icon icon, int horizontalAlignment)
Creates a JLabel instance with the specified text, image, and horizontal alignment.

JLabel(String text, int horizontalAlignment)
Creates a JLabel instance with the specified text and horizontal alignment.

Like us on Facebook