How do I put MouseEvent into Console, or make Frame hidden but functional?

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Java

console

frame

I'm using the Console class in Holtsoft's Ready To Program Java for this. I'm not allowed to use javax.swing or make this an applet.

I don't know how to make the program, but need to make it:
a) Run only in the console window or
b) Make the Frame window hidden, but still functional

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

public class MouseTest extends Frame
{
    int startX, startY, endX, endY;
    Console c = new Console ();
    public MouseTest ()
    {
        super ();

        MouseListener start = new MouseListener ()
        {
            public void mouseClicked (MouseEvent e)
            {
            }

            public void mouseEntered (MouseEvent e)
            {
            }

            public void mouseExited (MouseEvent e)
            {
            }

            public void mousePressed (MouseEvent e)
            {
                startX = endX = e.getX ();
                startY = endY = e.getY ();
                repaint ();
            }

            public void mouseReleased (MouseEvent e)
            {
            }
        }
        ;
        addMouseListener (start);

        MouseMotionListener end = new MouseMotionListener ()
        {
            public void mouseDragged (MouseEvent e)
            {
                endX = e.getX ();
                endY = e.getY ();
                repaint ();
            }

            public void mouseMoved (MouseEvent e)
            {
            }
        }
        ;
        addMouseMotionListener (end);

    }


    public void paint (Graphics g)
    {
        super.paint (g);
        c.clear ();
        c.setColor (Color.black);
        c.drawLine (startX, startY, endX, endY);
    }


    public static void main (String args[])
    {
        Frame frame = new MouseTest ();
        frame.setLocation (950, 100);
        frame.setSize (400, 400);
        frame.enable ();
        frame.show ();

    }
}