Introduction
The class MouseAdapter is an abstract (adapter) class for receiving mouse events. All methods of this class are empty. This class is convenience class for creating listener objects.
Class declaration
Following is the declaration for java.awt.event.MouseAdapter class:
public abstract class MouseAdapter
extends Object
implements MouseListener, MouseWheelListener, MouseMotionListener
Class constructors
| S.N. | Constructor & Description |
|---|---|
| 1 | MouseAdapter() |
Class methods
| S.N. | Method & Description |
|---|---|
| 1 | void mouseClicked(MouseEvent e)Invoked when the mouse button has been clicked (pressed and released) on a component. |
| 2 | void mouseDragged(MouseEvent e)Invoked when a mouse button is pressed on a component and then dragged. |
| 3 | void mouseEntered(MouseEvent e)Invoked when the mouse enters a component. |
| 4 | void mouseExited(MouseEvent e)Invoked when the mouse exits a component. |
| 5 | void mouseMoved(MouseEvent e)Invoked when the mouse cursor has been moved onto a component but no buttons have been pushed. |
| 6 | void mousePressed(MouseEvent e)Invoked when a mouse button has been pressed on a component. |
| 7 | void mouseReleased(MouseEvent e)Invoked when a mouse button has been released on a component. |
| 8 | void mouseWheelMoved(MouseWheelEvent e)Invoked when the mouse wheel is rotated. |
Methods inherited
This class inherits methods from the following classes:
- java.lang.Object
MouseAdapter Example
Create the following java program using any editor of your choice in say D:/ > AWT > com > adglob > gui >AwtAdapterDemo.java
package com.adglob.gui;
import java.awt.*;
import java.awt.event.*;
public class AwtAdapterDemo {
private Frame mainFrame;
private Label headerLabel;
private Label statusLabel;
private Panel controlPanel;
public AwtAdapterDemo(){
prepareGUI();
}
public static void main(String[] args){
AwtAdapterDemo awtAdapterDemo = new AwtAdapterDemo();
awtAdapterDemo.showMouseAdapterDemo();
}
private void prepareGUI(){
mainFrame = new Frame("Java AWT Examples");
mainFrame.setSize(400,400);
mainFrame.setLayout(new GridLayout(3, 1));
mainFrame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent windowEvent){
System.exit(0);
}
});
headerLabel = new Label();
headerLabel.setAlignment(Label.CENTER);
statusLabel = new Label();
statusLabel.setAlignment(Label.CENTER);
statusLabel.setSize(350,100);
controlPanel = new Panel();
controlPanel.setLayout(new FlowLayout());
mainFrame.add(headerLabel);
mainFrame.add(controlPanel);
mainFrame.add(statusLabel);
mainFrame.setVisible(true);
}
private void showMouseAdapterDemo(){
headerLabel.setText("Listener in action: MouseAdapter");
Panel panel = new Panel();
panel.setBackground(Color.magenta);
panel.setLayout(new FlowLayout());
panel.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e) {
statusLabel.setText("Mouse Clicked: ("
+e.getX()+", "+e.getY() +")");
}
});
Label msglabel = new Label();
msglabel.setAlignment(Label.CENTER);
msglabel.setText("Welcome to Adglob AWT Tutorial.");
msglabel.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e) {
statusLabel.setText("Mouse Clicked: ("
+e.getX()+", "+e.getY() +")");
}
});
panel.add(msglabel);
controlPanel.add(panel);
mainFrame.setVisible(true);
}
}
Compile the program using command prompt. Go to D:/ > AWT and type the following command.
D:\AWT>javac com\adglob\gui\AwtAdapterDemo.java
If no error comes that means compilation is successful. Run the program using following command.
D:\AWT>java com.adglob.gui.AwtAdapterDemo
Verify the following output
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