Adjusting the color constituents using Scrollbars

Question

Hello, i'm trying to adjust the color gradient of the canvas by varying it using three Scrollbars. i've come up with the following code, but i'm not getting the desired effects. can anyone help me modify the code so that each scrollbar affects one color constituent.
import java.awt.*;
import java.awt.event.*;
public class SimpleScrollBar extends java.applet.Applet
  Canvas can;
  Scrollbar s;
  Scrollbar z;
  Scrollbar t;
  Color bg;
  int b = 0;
  int g = 0;
  int r;
  public void init()
     setLayout(new GridLayout(1,1,10,10));
     bg = new Color(0,0,0);
     can = new Canvas();
     s = new Scrollbar(Scrollbar.VERTICAL,0,0,0,255);
     z = new Scrollbar(Scrollbar.VERTICAL,0,0,0,255);
     t = new Scrollbar(Scrollbar.VERTICAL,0,0,0,255);
     can.setBackground(bg);
     add(can);
     add(s);
     add(z);
     add(t);
  public boolean handleEvent(Event evt)
      if(evt.target instanceof Scrollbar)
        r = s.getValue();
        r = z.getValue();
        r = t.getValue();
        bg = new Color(r,b,g);
        can.setBackground(bg);
      return true;
}

Answer 1

Your problem lies in your handleEvent method. Look at your code, you assign the values of the three scrollbars to the same variable. Also, even if that did work, you mixed up your rgb as rbg.
This should work.
public boolean handleEvent(Event evt)
  if(evt.target instanceof Scrollbar)
    can.setBackground( new Color( s.getValue(), z.getValue(), t.getValue() ) ) ;
  return true;