Java Tutorial
Control Statements
Java Object Class
Java Inheritance
- inheritance(is-a)
- aggregation(has-a)
Java Polymorphism
Java Abstraction
Java Encapsulation
Java Array
- java-array
Java OOPs Misc
Java String
Java String Methods
Java Regex
- java-regex-api
Exception Handling
Java Inner Class
Java Multithreading
Java Synchronization
Java I/O
Java Serialization
- java-serialization
- java-transient-keyword
Java Networking
Java AWT & Events
Java Swing
Java Swing Apps
LayoutManagers
JavaFX Tutorial
JavaFX 2D Shapes
JavaFX Text
- javafx-text
JavaFX Effects
JavaFX Transformation
JavaFX Animation
JavaFX 3D Shapes
JavaFX Layouts
JavaFX UI
JavaFX Charts
JavaFX CSS
- javafx-css
Media with JavaFX
JavaFX Event Handling
Java Applet
Java Reflection
Java 8 Date Time
Java Date (Classical)
Java Date Format
- dateformat
- simpledateformat
Current Date Time
- get-current-date-time
Java Conversion
Java Collections
Java JDBC
Java New Features
- java-new-features
Java 9 Features
Java 8 Features
Java 7 Features
Java 4/5 Features
RMI
- java-rmi
Internationalization

Java Adapter Classes

Java adapter classes provide the default implementation of listener interfaces. If you inherit the adapter class, you will not be forced to provide the implementation of all the methods of listener interfaces. So it saves code.

The adapter classes are found in java.awt.event, java.awt.dnd and javax.swing.event packages. The Adapter classes with their corresponding listener interfaces are given below.

java.awt.event Adapter classes

Adapter class	Listener interface
WindowAdapter	WindowListener
KeyAdapter	KeyListener
MouseAdapter	MouseListener
MouseMotionAdapter	MouseMotionListener
FocusAdapter	FocusListener
ComponentAdapter	ComponentListener
ContainerAdapter	ContainerListener
HierarchyBoundsAdapter	HierarchyBoundsListener

java.awt.dnd Adapter classes

Adapter class	Listener interface
DragSourceAdapter	DragSourceListener
DragTargetAdapter	DragTargetListener

javax.swing.event Adapter classes

Adapter class	Listener interface
MouseInputAdapter	MouseInputListener
InternalFrameAdapter	InternalFrameListener

Java WindowAdapter Example

import java.awt.*;
import java.awt.event.*;
public class AdapterExample{
	Frame f;
	AdapterExample(){
		f=new Frame("Window Adapter");
		f.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e) {
				f.dispose();
			}
		});
		
		f.setSize(400,400);
		f.setLayout(null);
		f.setVisible(true);
	}
public static void main(String[] args) {
	new AdapterExample();
}
}

Output:

Java MouseAdapter Example

import java.awt.*;
import java.awt.event.*;
public class MouseAdapterExample extends MouseAdapter{
	Frame f;
	MouseAdapterExample(){
		f=new Frame("Mouse Adapter");
		f.addMouseListener(this);
		
		f.setSize(300,300);
		f.setLayout(null);
		f.setVisible(true);
	}
	public void mouseClicked(MouseEvent e) {
		Graphics g=f.getGraphics();
		g.setColor(Color.BLUE);
		g.fillOval(e.getX(),e.getY(),30,30);
	}
	
public static void main(String[] args) {
	new MouseAdapterExample();
}
}

Output:

Java MouseMotionAdapter Example

import java.awt.*;
import java.awt.event.*;
public class MouseMotionAdapterExample extends MouseMotionAdapter{
	Frame f;
	MouseMotionAdapterExample(){
		f=new Frame("Mouse Motion Adapter");
		f.addMouseMotionListener(this);
		
		f.setSize(300,300);
		f.setLayout(null);
		f.setVisible(true);
	}
public void mouseDragged(MouseEvent e) {
	Graphics g=f.getGraphics();
	g.setColor(Color.ORANGE);
	g.fillOval(e.getX(),e.getY(),20,20);
}
public static void main(String[] args) {
	new MouseMotionAdapterExample();
}
}

Output:

Java KeyAdapter Example

import java.awt.*;
import java.awt.event.*;
public class KeyAdapterExample extends KeyAdapter{
	Label l;
	TextArea area;
	Frame f;
	KeyAdapterExample(){
		f=new Frame("Key Adapter");
		l=new Label();
		l.setBounds(20,50,200,20);
		area=new TextArea();
		area.setBounds(20,80,300, 300);
		area.addKeyListener(this);
		
		f.add(l);f.add(area);
		f.setSize(400,400);
		f.setLayout(null);
		f.setVisible(true);
	}
	public void keyReleased(KeyEvent e) {
		String text=area.getText();
		String words[]=text.split("\\s");
		l.setText("Words: "+words.length+" Characters:"+text.length());
	}

	public static void main(String[] args) {
		new KeyAdapterExample();
	}
}

Output:

Next TopicHow to close AWT Window in Java

← prev next →

Hot Tutorials

Contact US

Email:[email protected]

Java Adapter classes

10/30

Java Tutorial

Control Statements

Java Object Class

Java Inheritance

Java Polymorphism

Java Abstraction

Java Encapsulation

Java Array

Java OOPs Misc

Java String

Java String Methods

Java Regex

Exception Handling

Java Inner Class

Java Multithreading

Java Synchronization

Java I/O

Java Serialization

Java Networking

Java AWT & Events

Java Swing

Java Swing Apps

LayoutManagers

JavaFX Tutorial

JavaFX 2D Shapes

JavaFX Text

JavaFX Effects

JavaFX Transformation

JavaFX Animation

JavaFX 3D Shapes

JavaFX Layouts

JavaFX UI

JavaFX Charts

JavaFX CSS

Media with JavaFX

JavaFX Event Handling

Java Applet

Java Reflection

Java 8 Date Time

Java Date (Classical)

Java Date Format

Current Date Time

Java Conversion

Java Collections

Java JDBC

Java New Features

Java 9 Features

Java 8 Features

Java 7 Features

Java 4/5 Features

RMI

Internationalization

Java Adapter Classes

java.awt.event Adapter classes

java.awt.dnd Adapter classes

javax.swing.event Adapter classes

Java WindowAdapter Example

Java MouseAdapter Example

Java MouseMotionAdapter Example

Java KeyAdapter Example

Hot Tutorials

Contact US