Core Java - [Applet: AWT ScrollBar Class]

♠ Posted by Unknown in Core Java at 06:42

Applet: AWT ScrollBar Class

//Write an applet that contains three scroll-bars.

package mj;

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

import java.io.*;

public class ScrollBarApplet extends Applet implements AdjustmentListener

{

  Scrollbar rsb,gsb,bsb;

  Canvas can;

  

  public void init()

  {

    rsb=new Scrollbar(Scrollbar.HORIZONTAL,0,5,0,255);

    rsb.addAdjustmentListener(this);

  

    bsb=new Scrollbar(Scrollbar.HORIZONTAL,0,5,0,255);

    bsb.addAdjustmentListener(this);

    

    gsb=new Scrollbar(Scrollbar.HORIZONTAL,0,5,0,255);

    gsb.addAdjustmentListener(this);

    can=new Canvas();

    can.setSize(20,30);

    Label l1=new Label("red");

    Label l2=new Label("green");

    Label l3=new Label("blue");

    add(l1);

    add(rsb);

    

    add(l2);

    add(bsb);

    

    add(l3);

    add(gsb);

 }

  public void adjustmentValueChanged(AdjustmentEvent ae)

  {

    can.repaint();

  }

  public void paint(Graphics gg)

  {

        int r=rsb.getValue();

        int b=bsb.getValue();

        int g=gsb.getValue();

        can.setBackground(new Color(r,g,b));

  }

}