Sorry, you're wright

I overwrite the method but i didn't work either. This is my class:

class Point extends JComponent{

     private int pointDisplaySize = 5;
     private int fp, tp;

      public Point(int FP, int TP){
        fp = FP;
        tp = TP;
        this.setLocation(fp,tp);
        this.setSize(new Dimension(pointDisplaySize,pointDisplaySize));
        this.setPreferredSize(new
Dimension(pointDisplaySize,pointDisplaySize));
     }

      public void paintComponent(Graphics g )
     {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D)g;
        Ellipse2D.Double ellipse = new Ellipse2D.Double(fp, tp,
pointDisplaySize, pointDisplaySize);
        g2d.fill(ellipse);
     }

      public java.lang.String getToolTipText(java.awt.event.MouseEvent
event){
        return ("("+tp+","+fp+")");
     }

  }

I have a vector with several Point objects. For each object, I'm adding a
MouseListener. But it seems that it is not handling the mouse events.
Is that right? I'm new in gui programing and not very familiar in handling
events.

Thanks,

Ronaldo