Hello all,
  I'm having problems adding a MouseListener to a canvas.

I have a class that extends Canvas, and I can't for the life of me add a
MouseListener. I've tried:

Adding a MouseListener from within the constructor:
  this.addMouseListener(this);
As a side note: does this require me to override all the MouseEvent
methods? MouseClicked, MousePressed, etc.? Even if they are just
do-nothing methods. I do, anyway, because that is what I did with Event
listeners such as WindowEvent.

Also from the constructor with an Anon. Inner Class:
  addMouseListener(new MouseListener(){
    public void MouseClicked(MouseEvent e){
      // Do stuff here
    }
  });
No extra overriding required here.

And now I've just tried adding it from main():
  MousingAround le = new MousingAround();
  le.addMouseListener(le);
Methods overriden.

Always I get:
"MousingAround.java:61: addMouseListener(java.awt.event.MouseListener)
in java.awt.Component cannot be applied to (MousingAround)"

But since the class MousingAround extends Canvas... it should work? The
book I'm following has a canvas created which has a MouseListener added
to it...?

The example does it a different way: the class extends Frame, and a
canvas is added to that Frame - but that shouldn't, as far as I know,
have any difference apart from *how* I add the MouseListener.

Massively cut-down, for your viewing pleasure source code follows:
Also, a note: a class called GUIFrame is referenced, I include the
source for this also. There are no problems with GUIFrame.

Any help appreciated. If I've done something boneheaded, please point
this out nicely, thanks!

===========CODE FOLLOWS==============

import java.awt.*;
import java.awt.event.*;

public class MousingAround extends Canvas{

  Scrollbar horizontalBottomScrollBar;
  Scrollbar verticalSideScrollBar;

  public MousingAround(){

    // Create the frame
    Frame frame = new GUIFrame("MousingAround");

    // Create and add other graphical thingymibobs
    // Why did I include these even though they aren't
    // part of the problem?
    // Well, to show that I *can* use anonymous inner adapters!
    BottomScrollBar = new Scrollbar(Scrollbar.HORIZONTAL, 0, 20, 0, 50);
    BottomScrollBar.addAdjustmentListener(new AdjustmentListener(){
      public void adjustmentValueChanged(AdjustmentEvent e){
        repaint();
      }
    });
    SideScrollBar = new Scrollbar(Scrollbar.VERTICAL, 0, 20, 0, 50);
    SideScrollBar.addAdjustmentListener(new AdjustmentListener(){
      public void adjustmentValueChanged(AdjustmentEvent e){
        repaint();
      }
    });

    le.addMouseListener(le);

    frame.add(BottomScrollBar, BorderLayout.SOUTH);
    frame.add(SideScrollBar, BorderLayout.EAST);
    frame.add(this, BorderLayout.CENTER);
    frame.pack();
    frame.setSize(420, 420);
    frame.setResizable(true);
    frame.setVisible(true);
  }

  // Override the MouseListener methods
  public void MouseClicked(MouseEvent e){
    System.out.println("Click!");
  }

  public void MouseEntered(MouseEvent e){}
  public void MouseExited(MouseEvent e){}
  public void MousePressed(MouseEvent e){}
  public void MouseReleased(MouseEvent e){}

  public static void main(String args[]){

    // Create an instance of this class
    MousingAround le = new MousingAround();

  }

}

========= CODE ENDS ====================
=======HERE FOLLOWS THE CODE TO=========
========== GUIFrame.java ===============

import java.awt.*;
import java.awt.event.*;

public class GUIFrame extends Frame {

  public GUIFrame(String title) {
    super(title);
    setBackground(SystemColor.control);

    addWindowListener(new WindowAdapter() {
      //only need to override the method needed
      public void windowClosing(WindowEvent e) {
        dispose();
        System.exit(0);
      }
    });
  }

  /* Centers the Frame when setVisible(true) is called */
  public void setVisible(boolean visible) {
    if (visible) {
      Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
      setLocation((d.width-getWidth())/2,(d.height - getHeight())/2);
    }
    super.setVisible(visible);
  }

}

====== CODE ENDS HERE =============