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samar
Java adapter class
1 Answer(s)      3 years and 10 months ago
Posted in : Java Interview Questions


What is adapter class?

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October 27, 2010 at 4:48 PM


Hi,

Here is the andwer,

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);
      }
    });
  }
}

Thanks.



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