deal with colors in java
Tue Nov 11, 2008 5:57 pm
deal with colors in java
- Code:
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Ellipse2D;
import java.awt.image.BufferedImage;
import javax.swing.*;
import javax.swing.event.*;
public class ColorCompositeExample extends JFrame {
Canvas1 canvas;
JTextField textField;
JPanel panel;
JSlider slider;
JLabel label;
float value = 0.65f;
public ColorCompositeExample() {
super("Color-composite Example");
Container container = getContentPane();
canvas = new Canvas1();
container.add(canvas);
panel = new JPanel();
label = new JLabel("Color-Composite Slider: ");
slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 65);
slider.addChangeListener(new ChangeListener() {
public void stateChanged(ChangeEvent e) {
JSlider tempSlider = (JSlider) e.getSource();
value = (float) (tempSlider.getValue() / 100.0);
textField.setText(Float.toString(value));
canvas.repaint();
}
});
textField = new JTextField("0.70", 4);
panel.add(label);
panel.add(slider);
panel.add(textField);
container.add(BorderLayout.NORTH, panel);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setSize(450,400);
setVisible(true);
}
public static void main(String arg[]) {
new ColorCompositeExample();
}
class Canvas1 extends JLabel {
Ellipse2D.Float oval1, oval2, oval3, oval4;
Canvas1() {
oval1 = new Ellipse2D.Float(155, 60, 120, 150);
oval2 = new Ellipse2D.Float(75, 125, 120, 50);
oval3 = new Ellipse2D.Float(225, 125, 125, 75);
oval4 = new Ellipse2D.Float(120, 35, 120, 80);
setBackground(Color.white);
setSize(350, 300);
}
public void paint(Graphics g) {
Graphics2D g2D = (Graphics2D) g;
AlphaComposite alphaComp = AlphaComposite.getInstance(
AlphaComposite.SRC_OVER, value);
g2D.setComposite(alphaComp);
g2D.setStroke(new BasicStroke(6.0f));
GradientPaint gp = new GradientPaint(120f, 20f, Color.yellow, 220f,
120f, Color.blue);
g2D.setPaint(gp);
g2D.fill(oval1);
BufferedImage image= new BufferedImage(5, 5,
BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = image.createGraphics();
g2.fillOval(0, 0, 5, 5);
g2D.setColor(Color.yellow);
g2D.fill(oval2);
g2D.setColor(Color.green);
g2D.fill(oval3);
g2D.setColor(Color.red);
g2D.fill(oval4);
}
}
}
- Attachments
-
- screen shot
- colorCom2.gif (9.22 KiB) Viewed 4677 times
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