This code should have color.
I ran this program and the slider should produce color at the bottom of the frame but it doesn't please help.
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
/**
*
Title:
*
*
Description:
*
*
Copyright: Copyright (c) 2007
*
*
Company:
*
* @author not attributable
* @version 1.0
*/
public class ColorSlide extends JFrame implements ChangeListener{
ColorPanel canvas = new ColorPanel();
JSlider red = new JSlider(0, 255, 255);
JSlider green = new JSlider(0, 255, 0);
JSlider blue = new JSlider(0, 255, 0);
public ColorSlide() {
super("Color Slide");
setSize(270, 300);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
red.setMajorTickSpacing(50);
red.setMinorTickSpacing(10);
red.setPaintTicks(true);
red.setPaintLabels(true);
red.addChangeListener(this);
green.setMajorTickSpacing(50);
green.setMinorTickSpacing(10);
green.setPaintTicks(true);
green.setPaintLabels(true);
green.addChangeListener(this);
blue.setMajorTickSpacing(50);
blue.setMinorTickSpacing(10);
blue.setPaintTicks(true);
blue.setPaintLabels(true);
blue.addChangeListener(this);
JLabel redLabel = new JLabel("Red: ");
JLabel greenLabel = new JLabel("Green: ");
JLabel blueLabel = new JLabel("Blue: ");
GridLayout grid = new GridLayout(4, 1);
FlowLayout right = new FlowLayout(FlowLayout.RIGHT);
Container pane = getContentPane();
pane.setLayout(grid);
JPanel redPanel = new JPanel();
redPanel.setLayout(right);
redPanel.add(redLabel);
redPanel.add(red);
pane.add(redPanel);
JPanel greenPanel = new JPanel();
greenPanel.setLayout(right);
greenPanel.add(greenLabel);
greenPanel.add(green);
pane.add(greenPanel);
JPanel bluePanel = new JPanel();
bluePanel.setLayout(right);
bluePanel.add(blueLabel);
bluePanel.add(blue);
pane.add(bluePanel);
setContentPane(pane);
}
public void stateChanged(ChangeEvent evt){
JSlider source = (JSlider)evt.getSource();
if (source.getValueIsAdjusting() != true) {
Color current = new Color(red.getValue(), green.getValue(), blue.getValue());
canvas.changeColor(current);
canvas.repaint();
}
}
public Insets getInsets(){
Insets border = new Insets(45, 10, 10, 10);
return border;
}
public static void main(String[] arguments){
ColorSlide cs = new ColorSlide();
}
}
class ColorPanel extends JPanel{
Color background;
ColorPanel(){
background = Color.red;
}
public void paintComponent(Graphics comp){
Graphics2D comp2D = (Graphics2D)comp;
comp2D.setColor(background);
comp2D.fillRect(0, 0, getSize().width, getSize().height);
}
void changeColor(Color newBackground){
background = newBackground;
}
}
