Cyclic Gradient Paint : Gradient Paint « 2D Graphics « Java Tutorial

1. Java Tutorial
2. 2D Graphics
3. Gradient Paint

import java.awt.Color;
import java.awt.GradientPaint;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.geom.Line2D;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JComponent;
import javax.swing.JFrame;
class GradientPane extends JComponent {
  public void paint(Graphics g) {
    Graphics2D g2D = (Graphics2D) g;
    Point2D.Float p1 = new Point2D.Float(150.f, 75.f); // Gradient line start
    Point2D.Float p2 = new Point2D.Float(250.f, 75.f); // Gradient line end
    float width = 300;
    float height = 50;
    GradientPaint g1 = new GradientPaint(p1, Color.WHITE, p2, Color.DARK_GRAY, true); // Cyclic
                                                                                      // gradient
    Rectangle2D.Float rect1 = new Rectangle2D.Float(p1.x - 100, p1.y - 25, width, height);
    g2D.setPaint(g1); // Gradient color fill
    g2D.fill(rect1); // Fill the rectangle
    g2D.setPaint(Color.BLACK); // Outline in black
    g2D.draw(rect1); // Fill the rectangle
    g2D.draw(new Line2D.Float(p1, p2));
  }
}
public class CyclicGradientPaint {
  public static void main(String[] a) {
    JFrame window = new JFrame("Cyclic Gradient Paint");
    window.setBounds(30, 30, 300, 300);
    window.getContentPane().add(new GradientPane());
    window.setVisible(true);
  }
}

16.18.Gradient Paint
	16.18.1.	Gradients: a smooth blending of shades from light to dark or from one color to another
	16.18.2.	Control the direction of Gradients
	16.18.3.	Horizontal Gradients
	16.18.4.	Vertical Gradient Paint
	16.18.5.	Gradients in the middle
	16.18.6.	Cyclic Gradient Paint
	16.18.7.	Acyclic Gradient Paint
	16.18.8.	String gradient paint
	16.18.9.	A non-cyclic gradient
	16.18.10.	Drawing with a Gradient Color