color test in java

import java.awt.*;
public class ColorTest extends java.applet.Applet {
ColorControls RGBcontrols, HSBcontrols;
Canvas swatch;
public void init() {
Color theColor = new Color(0,0,0);
float[] HSB = Color.RGBtoHSB(theColor.getRed(),
theColor.getGreen(), theColor.getBlue(),
(new float[3]));
setLayout(new GridLayout(1,3,10,10));
// The color swatch
swatch = new Canvas();
swatch.setBackground(theColor);
// the control panels
RGBcontrols = new ColorControls(this,"Red", "Green", "Blue",theColor.getRed(), theColor.getGreen(),theColor.getBlue());
HSBcontrols = new ColorControls(this,"Hue", "Saturation", "Brightness",(int)(HSB[0] * 360), (int)(HSB[1] * 100),(int)(HSB[2] * 100));
add(swatch);
add(RGBcontrols);
add(HSBcontrols);
}
public Insets insets() {
return new Insets(10,10,10,10);
}
void update(ColorControls in) {
Color c;
String v1 = in.f1.getText();
String v2 = in.f2.getText();
String v3 = in.f3.getText();
if (in == RGBcontrols) { // change to RGB
c = new Color(Integer.parseInt(v1),
Integer.parseInt(v2),
Integer.parseInt(v3));
swatch.setBackground(c);

float[] HSB = Color.RGBtoHSB(c.getRed(),c.getGreen(),
c.getBlue(), (new float[3]));
HSB[0] *= 360;
HSB[1] *= 100;
HSB[2] *= 100;
HSBcontrols.f1.setText(String.valueOf((int)HSB[0]));
HSBcontrols.f2.setText(String.valueOf((int)HSB[1]));
HSBcontrols.f3.setText(String.valueOf((int)HSB[2]));
}
else { // change to HSB
int f1 = Integer.parseInt(v1);
int f2 = Integer.parseInt(v2);
int f3 = Integer.parseInt(v3);
c = Color.getHSBColor((float)f1 / 360,
(float)f2 / 100, (float)f3/100);
swatch.setBackground(c);
RGBcontrols.f1.setText(String.valueOf(c.getRed()));
RGBcontrols.f2.setText(String.valueOf(
c.getGreen()));
RGBcontrols.f3.setText(String.valueOf(c.getBlue()));
}
}
}
class ColorControls extends Panel {
TextField f1, f2, f3;
ColorTest outerparent;
ColorControls(ColorTest target,
String l1, String l2, String l3,
int v1, int v2, int v3) {
this.outerparent = target;
setLayout(new GridLayout(3,4,10,10));
f1 = new TextField(String.valueOf(v1),10);
f2 = new TextField(String.valueOf(v2),10);
f3 = new TextField(String.valueOf(v3),10);
add(new Label(l1, Label.RIGHT));
add(f1);
add(new Label(l2, Label.RIGHT));
add(f2);
add(new Label(l3, Label.RIGHT));
add(f3);
}
public Insets insets() {
return new Insets(10,10,0,0);
}
public boolean action(Event evt, Object arg) {
if (evt.target instanceof TextField) {

this.outerparent.update(this);

// retrue true;
}
// else return false;

}
}