Gradient Color in java
Tue Nov 11, 2008 6:04 pm
Gradient Color in java
- Code:
import java.awt.*;
import javax.swing.*;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
public class ColorGradientExample extends JPanel{
public void paint(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
Dimension dim = getSize();
g2.translate(dim.width / 2, dim.height / 2);
Color[] color = {
Color.white, Color.lightGray, Color.gray, Color.darkGray,
Color.black, Color.red, Color.pink, Color.orange,
Color.yellow, Color.green, Color.magenta, Color.cyan, Color.blue
};
float size = 30;
float x = -size * color.length / 2;
float y = -size * 3 / 2;
for (int j = 0; j < color.length; j++) {
Ellipse2D shape = new Ellipse2D.Float(x + size * (float)j, y, size, size);
g2.setPaint(color[j]);
g2.fill(shape);
}
y += size;
Color color1 = Color.green;
Color color2 = Color.blue;
for (int j = 0; j < color.length; j++) {
float num = (float)j / (float)color.length;
int red = (int)(color2.getRed() * num + color1.getRed() * (1 - num));
int green = (int)(color2.getGreen() * num +
color1.getGreen() * (1 - num));
int blue = (int)(color2.getBlue() * num +
color1.getBlue() * (1 - num));
Color co = new Color(red, green, blue);
Ellipse2D shape = new Ellipse2D.Float(
x + size * (float)j, y, size, size);
g2.setPaint(co);
g2.fill(shape);
}
y += size;
color1 = Color.red;
for (int j = 0; j < color.length; j++) {
int alpha = (int)(255 * (float)j / (float)color.length);
Color co = new Color(color1.getRed(), color1.getGreen(),
color1.getBlue(), alpha);
Ellipse2D shape = new Ellipse2D.Float(
x + size * (float)j, y, size, size);
g2.setPaint(co);
g2.fill(shape);
}
y -= size * 2;
Rectangle2D frame = new Rectangle2D.Float(x, y, size * color.length, size * 3);
g2.setPaint(Color.black);
g2.draw(frame);
}
public static void main(String[] args) {
JFrame frame = new JFrame("Color Gradient Example");
frame.getContentPane().add(new ColorGradientExample());
frame.setSize(450, 300);
frame.show();
}
}
- Attachments
-
- output
- colorGradient.gif (9.84 KiB) Viewed 9096 times
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