COLOR PALATTE USING APPLET

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

public class ColorChooserApplet extends Applet implements AdjustmentListener

{

private float[]hsb=new float[3];

private int r=0,g=0,b=0;

private Scrollbar hueScroll,brightnessScroll,saturationScroll,blueScroll,redScroll,greenScroll;

private Label hueLabel,brightnessLabel,saturationLabel,redLabel,greenLabel,blueLabel;

private Canvas colorCanvas;

public void init()

{

Color.RGBtoHSB(0,0,0,hsb);

hueScroll=new Scrollbar(Scrollbar.HORIZONTAL,(int)(255*hsb[0]),10,0,265);

saturationScroll=new Scrollbar(Scrollbar.HORIZONTAL,(int)(255*hsb[1]),10,0,265);

brightnessScroll=new Scrollbar(Scrollbar.HORIZONTAL,(int)(255*hsb[2]),10,0,265);

redScroll=new Scrollbar(Scrollbar.HORIZONTAL,0,10,0,265);

greenScroll=new Scrollbar(Scrollbar.HORIZONTAL,0,10,0,265);

blueScroll=new Scrollbar(Scrollbar.HORIZONTAL,0,10,0,265);

hueLabel=new Label("H="+hsb[0]);

saturationLabel=new Label("S="+hsb[1]);

brightnessLabel=new Label("B="+hsb[2]);

redLabel=new Label("R=0");

greenLabel=new Label("G=0");

blueLabel=new Label("B=0");

hueScroll.setBackground(Color.lightGray);

saturationScroll.setBackground(Color.lightGray);

brightnessScroll.setBackground(Color.lightGray);

redScroll.setBackground(Color.lightGray);

greenScroll.setBackground(Color.lightGray);

blueScroll.setBackground(Color.lightGray);

hueLabel.setBackground(Color.white);

saturationLabel.setBackground(Color.white);

brightnessLabel.setBackground(Color.white);

redLabel.setBackground(Color.white);

greenLabel.setBackground(Color.white);

blueLabel.setBackground(Color.white);

hueScroll.addAdjustmentListener(this);

saturationScroll.addAdjustmentListener(this);

brightnessScroll.addAdjustmentListener(this);

redScroll.addAdjustmentListener(this);

greenScroll.addAdjustmentListener(this);

blueScroll.addAdjustmentListener(this);

colorCanvas=new Canvas();

colorCanvas.setBackground(Color.black);

setLayout(new GridLayout(1,3,3,3));

setBackground(Color.gray);

Panel scrolls=new Panel();

Panel Labels=new Panel();

add(scrolls);

add(Labels);

add(colorCanvas);

scrolls.setLayout(new GridLayout(6,1,2,2));

scrolls.add(redScroll);

scrolls.add(greenScroll);

scrolls.add(blueScroll);

scrolls.add(saturationScroll);

scrolls.add(brightnessScroll);

Labels.setLayout(new GridLayout(6,1,2,2));

Labels.add(redLabel);

Labels.add(greenLabel);

Labels.add(blueLabel);

Labels.add(hueLabel);

Labels.add(saturationLabel);

Labels.add(brightnessLabel);

}

public void adjustmentValueChanged(AdjustmentEvent eve)

{

int r1,g1,b1;

r1=redScroll.getValue();

g1=greenScroll.getValue();

b1=blueScroll.getValue();

if(r!=r1||g!=g1||b!=b1)

{

r=r1;

g=g1;

b=b1;

Color.RGBtoHSB(r,g,b,hsb);

}

else

{

hsb[0]=hueScroll.getValue()/255.0F;

hsb[1]=saturationScroll.getValue()/255.0F;

hsb[2]=brightnessScroll.getValue()/255.0F;

int rgb=Color.HSBtoRGB(hsb[0],hsb[1],hsb[2]);

r=(rgb>>16)&0xFF;

g=(rgb>>8)&0xFF;

b=rgb&0xFF;

}

redLabel.setText("R="+r);

greenLabel.setText("G="+g);

blueLabel.setText("B="+b);

hueLabel.setText("H="+hsb[0]);

saturationLabel.setText("S="+hsb[1]);

blueLabel.setText("B="+hsb[2]);

redScroll.setValue(r);

greenScroll.setValue(g);

blueScroll.setValue(b);

hueScroll.setValue((int)(255*hsb[0]));

saturationScroll.setValue((int)(255*hsb[1]));

brightnessScroll.setValue((int)(255*hsb[2]));

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

colorCanvas.repaint();

}

public Insets getInsets()

{

return new Insets(3,3,3,3);

}

}

embed.html

/* To run:

*javac ColorChooserApplet.java

*appletviewer embed.html

*/