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Adapters Example
Posted on: December 18, 2008 By Deepak Kumar

In the following program code, the adapter class has been used. This class has been used as an anonymous inner class to draw a rectangle within an applet.

Adapters Example

In the following program code, the adapter class has been used. This class has been used as an anonymous inner class to draw a rectangle within an applet. This example demonstrates the functionality of the mouse press. That is on every click of the mouse from top left corner, we get a rectangle on the release of the bottom right.

The following program demonstrates the functionality of adapter class.


import java.applet.*;

import java.awt.*; 

import java.awt.event.*; 



public class AdapterDemo extends Applet{

  public void init(){

  addMouseListener(

  new MouseAdapter(){

  int topX, bottomY;

  public void mousePressed(MouseEvent me){

  topX = me.getX();

  bottomY = me.getY();

  }

  public void mouseReleased(MouseEvent me){

  Graphics g = AdapterDemo.this.getGraphics();

  g.drawRect(topX, bottomY, me.getX()-topX, me.getY()-bottomY);

  }

  });

  }

}

Output of the program:

C:\newprgrm>javac AdapterDemo.java

C:\newprgrm>appletviewer AdapterDemo.html

C:\newprgrm>

Download this example.

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Comments

shini
July 5, 2011
Regarding log adapters

can i get sample examples for logging adapter classes

Pavan Gomladu
October 19, 2011
Introduce

Generally from this page i get information of that is the code generally create interaction between Hardware and Microprosessor as Adapter.

archie
April 21, 2012
question

Graphics g = AdapterDemo.this.getGraphics(); what does this do?

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