That error is because when you implement a class (which you did by saying DragRectangle implements MouseListener) you have to have all of the methods from the class.
Example: lets say these are the methods from MouseListener:
int mouseStuff();
Object moreMouseStuff();
Object otherMouseStuff();
That would mean that any time you write a class that 'implements MouseListener', your class would have to include the methods mouseStuff, moreMouseStuff, and otherMouseStuff. Specifically, the compiler is complaining because you need to have a method in your class that is declared as follows:
public void mouseExited(MouseEvent e){
}
(Side note: what is the point of the code in your mouseDragged method that says if (drag==false)? It seems to me that you never initialized the variable, dragged. Also, it seems like the variable is useless anyway, since if mouseDragged gets called, its guaranteed that the mouse was dragged.)
Note: to the kid who is having trouble, you can ignore everything I say after this line... pay attention to what I said above. Everything after this point is directed at Ezzaral & others.
Documentation for the class can be found here:
http://java.sun.com/j2se/1.4.2/docs/...eListener.html
If you read the documentation, it says that mouseDragged is NOT a method supported by the class, so I am confused why he implemented it. It says to use MouseMotionListener. Am I looking at the wrong documentation somehow?
edit: I looked at the documentation for MouseMotionListener & back at Ezzeral's code, and it turns out that the kid just implemented the wrong class. So nevermind my confusion.
Unsolved 
