SWING - MouseListener Interface

The class which processes the MouseEvent should implement this interface. The object of that class must be registered with a component. The object can be registered using the addMouseListener() method.
Following is the declaration for java.awt.event.MouseListener interface −
public interface MouseListener
   extends EventListener

void mouseClicked(MouseEvent e)
Invoked when the mouse button has been clicked (pressed and released) on a component.
void mouseEntered(MouseEvent e)
Invoked when the mouse enters a component.
void mouseExited(MouseEvent e)
Invoked when the mouse exits a component.
void mousePressed(MouseEvent e)
Invoked when a mouse button has been pressed on a component.
void mouseReleased(MouseEvent e)
Invoked when a mouse button has been released on a component.
This interface inherits methods from the following interfaces −
java.awt.EventListener
java.awt.EventListener
Create the following Java program using any editor of your choice in say D:/ > SWING > com > tutorialspoint > gui >
SwingListenerDemo.java
package com.tutorialspoint.gui;

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

public class SwingListenerDemo {
   private JFrame mainFrame;
   private JLabel headerLabel;
   private JLabel statusLabel;
   private JPanel controlPanel;

   public SwingListenerDemo(){
      prepareGUI();
   }
   public static void main(String[] args){
      SwingListenerDemo  swingListenerDemo = new SwingListenerDemo();  
      swingListenerDemo.showMouseListenerDemo();
   }
   private void prepareGUI(){
      mainFrame = new JFrame("Java SWING Examples");
      mainFrame.setSize(400,400);
      mainFrame.setLayout(new GridLayout(3, 1));

      headerLabel = new JLabel("",JLabel.CENTER );
      statusLabel = new JLabel("",JLabel.CENTER);        
      statusLabel.setSize(350,100);
      
      mainFrame.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent windowEvent){
            System.exit(0);
         }        
      });    
      controlPanel = new JPanel();
      controlPanel.setLayout(new FlowLayout());

      mainFrame.add(headerLabel);
      mainFrame.add(controlPanel);
      mainFrame.add(statusLabel);
      mainFrame.setVisible(true);  
   }
   private void showMouseListenerDemo(){
      headerLabel.setText("Listener in action: MouseListener");      

      JPanel panel = new JPanel();      
      panel.setBackground(Color.magenta);
      panel.setLayout(new FlowLayout());        
      panel.addMouseListener(new CustomMouseListener());

      JLabel msglabel = 
      new JLabel("Welcome to TutorialsPoint SWING Tutorial.",JLabel.CENTER);        
      panel.add(msglabel);

      msglabel.addMouseListener(new CustomMouseListener());
      panel.add(msglabel);

      controlPanel.add(panel);
      mainFrame.setVisible(true);  
   }
   class CustomMouseListener implements MouseListener {
      public void mouseClicked(MouseEvent e) {
         statusLabel.setText("Mouse Clicked: ("+e.getX()+", "+e.getY() +")");
      }
      public void mousePressed(MouseEvent e) {
      }
      public void mouseReleased(MouseEvent e) {
      }
      public void mouseEntered(MouseEvent e) {
      }
      public void mouseExited(MouseEvent e) {
      }
   }
}
Compile the program using the command prompt. Go to D:/ > SWING and type the following command.
D:\SWING>javac com\tutorialspoint\gui\SwingListenerDemo.java

If no error occurs, it means the compilation is successful. Run the program using the following command.
D:\SWING>java com.tutorialspoint.gui.SwingListenerDemo

Verify the following output.

    30 Lectures 
     3.5 hours 

 Pranjal Srivastava

    13 Lectures 
     1 hours 

 Pranjal Srivastava

    25 Lectures 
     4.5 hours 

 Emenwa Global, Ejike IfeanyiChukwu

    14 Lectures 
     1.5 hours 

 Travis Rose

    14 Lectures 
     1 hours 

 Travis Rose
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