Change Type / Custom Color Of Rectangle Made Through DragMode

What I'm trying to do is basically draw a Rectangle outline through left-click and then dragging the mouse to the size one wants.

After one has created this rectangle, the user can change the color of the rectangle through clicking the 3 sliders found on the top in the program. Upon the change in color, the rectangle should change from "g.drawRect" to "g.fillRect" and use the desired color.

I have the basic outline of the program done, but working with the last part (the color and changing of the Rectangle type after changing the color)

Is there like a "then" command in Java? Like: after you've done x, do y. That would make this heaps easier.

import java.awt.event.*;
import java.awt.*;
import java.applet.*;
 
//Diese Applikation offnet ein Fenster,
//in welchem durch einen gehaltenen linken Mouse Klick
//ein Reckteck gezeichnet wird
 
public class WhatIsTheProblem006 extends Applet
implements AdjustmentListener {

[Code] ....