Question

Consider the following interface (comments omitted): public interface MouseListener extends EventListener { void mouseClicked(MouseEvent event); void mousePressed(MouseEvent event); void mouseReleased(MouseEvent event); void mouseEntered(MouseEvent event); void mouseExited(MouseEvent event); } Assume your extend the interface to handle some mouse events for your application so that you have the following: // Context omitted private class MyMouseListener implements MouseListener { void mouseClicked(MouseEvent event) // handle mouse click here } As it turned out, MyMouseListener cannot be used the way it is. What is the problem? "extends" keyword needs to be used instead of "implements" in line "private class MyMouseListener implements MouseListener" classes cannot be private in Java mouseClicked method should return a value

          Consider the following interface (comments omitted):
public interface MouseListener extends EventListener
{
void mouseClicked(MouseEvent event);
void mousePressed(MouseEvent event);
void mouseReleased(MouseEvent event);
void mouseEntered(MouseEvent event);
void mouseExited(MouseEvent event);
}
Assume your extend the interface to handle some mouse events for your application so that you have the following:
// Context omitted
private class MyMouseListener implements MouseListener
{
void mouseClicked(MouseEvent event)
// handle mouse click here
}
As it turned out, MyMouseListener cannot be used the way it is. What is the problem?
"extends" keyword needs to be used instead of "implements" in line "private class MyMouseListener implements MouseListener"
classes cannot be private in Java
mouseClicked method should return a value

Consider the following interface (comments omitted):
public interface MouseListener extends EventListener

void mouseClicked(MouseEvent event);
void mousePressed(MouseEvent event);
void mouseReleased(MouseEvent event);
void mouseEntered(MouseEvent event);
void mouseExited(MouseEvent event);

Assume your extend the interface to handle some mouse events for your application so that you have the following:
// Context omitted
private class MyMouseListener implements MouseListener

void mouseClicked(MouseEvent event)
// handle mouse click here

As it turned out, MyMouseListener cannot be used the way it is. What is the problem?
"extends" keyword needs to be used instead of "implements" in line "private class MyMouseListener implements MouseListener"
classes cannot be private in Java
mouseClicked method should return a value

Added by Sherry S.

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