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event handling error .. need help

abhay jain
Ranch Hand

Joined: Jun 03, 2011
Posts: 130


/*

C:\>javac Mouse1.java
Mouse1.java:12: Mouse1 is not abstract and does not override abstract method mou
seReleased(java.awt.event.MouseEvent) in java.awt.event.MouseListener
public class Mouse1 extends Applet implements MouseListener, MouseMotionListener
^
1 error

*/
[/code]
Yogesh Gnanapraksam
Ranch Hand

Joined: Dec 17, 2009
Posts: 133
Hi Abhay,
Whenever you implement an interface,make sure you satisfy the contract specified by the interface.
The error message clearly states that
mouseReleased(java.awt.event.MouseEvent) method declared in the interface is not implemented in your class.

You can just provide a dummy implementation if you do not wish to handle the mousereleased event.
public void mouseReleased(java.awt.event.MouseEvent e)
{
`
}

Thanks
Yogi
abhay jain
Ranch Hand

Joined: Jun 03, 2011
Posts: 130


You can just provide a dummy implementation if you do not wish to handle the mousereleased event.
public void mouseReleased(java.awt.event.MouseEvent e)
{
`
}

Thanks
Yogi



thanks yogi ,
it works after one more .....mousePressed event , so we can say that it was necessary to put that dummy code because we implemented related interfaces .. right ?? or there is another reason behind it ??
Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19723
    
  20

If a class implements an interface it must implement all methods of that interface. In those cases you don't want to, you must provide skeleton implementations - empty bodies where void is returned, and returning some constant where a return value is required.


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