JLabel class

JLabel class is used to create a label, which can be used to display an information to the user or a text before the textfield or an image. JLabel is a component which extends JComponent class and it can be added to the container.

Constructors of JLabel

Constructor	Description
public JLabel()	Creates a JLabel with an empty text.
public JLabel(String text)	Creates a JLabel with an specified text.
public JLabel(Icon image)	Creates a JLabel with an icon.

Methods of JLabel class

Methods	Description
public void setText(String text)	Sets a String message on the JLabel.
public String getText()	Gets a String message of JLabel.
*public void setIcon(Icon icon)*	Sets an icon or image over the JLabel.
public Icon getIcon()	Gets the icon or image of the JLabel.
void setHorizontalTextPosition(int textPosition)	Sets the JLabel message on the LEFT/RIGHT of its icon or image.
void setVerticalTextPosition(int textPosition)	Sets the JLabel message on the TOP/BOTTOM of its icon or image.

An example of JLabel

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

public class Swing2
{
public static void main(String... ar)
{
SwingUtilities.invokeLater(new Runnable() {
public void run()
{
new A();
}
});

} //Closing the main method
} //Closing the class Swing1

class A
{
JFrame jf;

JLabel label1, label2, label3;


A()
{
jf = new JFrame("JLabel example");

label1 = new JLabel();
label2 = new JLabel("Hello, how are you?");
label3 = new JLabel("How is your day going on?");


label1.setText("Welcome"); 	//Setting the text of a JLabal
jf.setLayout(new FlowLayout());
jf.add(label1);			//Adding label1 to the Jframe
jf.add(label2);			//Adding label2 to the Jframe
jf.add(label3);			//Adding label3 to the Jframe
jf.setVisible(true);
jf.setSize(300,300);
}
}

When you run the code, you are presented a window shown below -:

Figure 1

Setting an icon image on the JLabel

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

public class Swing3
{
public static void main(String... ar)
{
SwingUtilities.invokeLater(new Runnable() {
public void run()
{
new A();
}
});

} //Closing the main method
} //Closing the class Swing1

class A
{
JFrame jf;

JLabel label1, label2;


A()
{
jf = new JFrame("JLabel example");

label1 = new JLabel();
label2 = new JLabel();


label1.setText("A sunny day");
label1.setHorizontalTextPosition(SwingConstants.LEFT);
label1.setIcon(new ImageIcon("Smiley.gif"));

label2.setText("A rainy day");
label2.setHorizontalTextPosition(SwingConstants.RIGHT);
label2.setIcon(new ImageIcon("Smiley2.gif"));

jf.setLayout(new FlowLayout());
jf.add(label1);
jf.add(label2);

jf.setVisible(true);
jf.setSize(300,300);
}
}

When you run the code, you are presented a window shown in the Figure2 below -:

Figure 2

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