Applet程序。
1 import javax.swing.*; 2 import java.awt.*; 3 import java.awt.geom.*; 4 5 @SuppressWarnings("serial") 6 public class GradientApplet extends JApplet { 7 // Initialize the applet 8 @Override 9 public void init() { 10 GradientPane pane = new GradientPane(); // Pane containing filled rectangles 11 getContentPane().add(pane); // BorderLayout.CENTER is default position 12 } 13 14 // Class defining a pane on which to draw 15 class GradientPane extends JComponent { 16 @Override 17 public void paint(Graphics g) { 18 Graphics2D g2D = (Graphics2D)g; 19 20 Point2D.Float p1 = new Point2D.Float(150.f, 75.f); // Gradient line start 21 Point2D.Float p2 = new Point2D.Float(250.f, 75.f); // Gradient line end 22 float width = 300; 23 float height = 50; 24 GradientPaint g1 = new GradientPaint(p1, Color.WHITE, 25 p2, Color.DARK_GRAY, 26 true); // Cyclic gradient 27 Rectangle2D.Float rect1 = new Rectangle2D.Float(p1.x-100, p1.y-25, width,height); 28 g2D.setPaint(g1); // Gradient color fill 29 g2D.fill(rect1); // Fill the rectangle 30 g2D.setPaint(Color.BLACK); // Outline in black 31 g2D.draw(rect1); // Fill the rectangle 32 g2D.draw(new Line2D.Float(p1, p2)); 33 g2D.drawString("Cyclic Gradient Paint", p1.x-100, p1.y-50); 34 g2D.drawString("p1", p1.x-20, p1.y); 35 g2D.drawString("p2", p2.x+10, p2.y); 36 37 p1.setLocation(150, 200); 38 p2.setLocation(250, 200); 39 GradientPaint g2 = new GradientPaint(p1, Color.WHITE, 40 p2, Color.DARK_GRAY, 41 false); // Acyclic gradient 42 rect1.setRect(p1.x-100, p1.y-25, width, height); 43 g2D.setPaint(g2); // Gradient color fill 44 g2D.fill(rect1); // Fill the rectangle 45 g2D.setPaint(Color.BLACK); // Outline in black 46 g2D.draw(rect1); // Fill the rectangle 47 g2D.draw(new Line2D.Float(p1, p2)); 48 g2D.drawString("Acyclic Gradient Paint", p1.x-100, p1.y-50); 49 g2D.drawString("p1", p1.x-20, p1.y); 50 g2D.drawString("p2", p2.x+10, p2.y); 51 } 52 } 53 }
HTML文件：
1 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2 3 <html> <head> </head> 4 <body bgcolor="000000"> 5 <center> 6 <applet 7 code = "GradientApplet.class" 8 width = "400" 9 height = "280" 10 > 11 </applet> 12 </center> 13 </body> 14 </html>