public class ShapesJPanel extends JPanel
1: // Fig. 12.29: ShapesJPanel.java
2: // Demonstrating some Java 2D shapes.
3: import java.awt.Color;
4: import java.awt.Graphics;
5: import java.awt.BasicStroke;
6: import java.awt.GradientPaint;
7: import java.awt.TexturePaint;
8: import java.awt.Rectangle;
9: import java.awt.Graphics2D;
10: import java.awt.geom.Ellipse2D;
11: import java.awt.geom.Rectangle2D;
12: import java.awt.geom.RoundRectangle2D;
13: import java.awt.geom.Arc2D;
14: import java.awt.geom.Line2D;
15: import java.awt.image.BufferedImage;
16: import javax.swing.JPanel;
17:
18: public class ShapesJPanel extends JPanel
19: {
20: // draw shapes with Java 2D API
21: public void paintComponent( Graphics g )
22: {
23: super.paintComponent( g ); // call superclass's paintComponent
24:
25: Graphics2D g2d = ( Graphics2D ) g; // cast g to Graphics2D
26:
27: // draw 2D ellipse filled with a blue-yellow gradient
28: g2d.setPaint( new GradientPaint( 5, 30, Color.BLUE, 35, 100,
29: Color.YELLOW, true ) );
30: g2d.fill( new Ellipse2D.Double( 5, 30, 65, 100 ) );
31:
32: // draw 2D rectangle in red
33: g2d.setPaint( Color.RED );
34: g2d.setStroke( new BasicStroke( 10.0f ) );
35: g2d.draw( new Rectangle2D.Double( 80, 30, 65, 100 ) );
36:
37: // draw 2D rounded rectangle with a buffered background
38: BufferedImage buffImage = new BufferedImage( 10, 10,
39: BufferedImage.TYPE_INT_RGB );
40:
41: // obtain Graphics2D from bufferImage and draw on it
42: Graphics2D gg = buffImage.createGraphics();
43: gg.setColor( Color.YELLOW ); // draw in yellow
44: gg.fillRect( 0, 0, 10, 10 ); // draw a filled rectangle
45: gg.setColor( Color.BLACK ); // draw in black
46: gg.drawRect( 1, 1, 6, 6 ); // draw a rectangle
47: gg.setColor( Color.BLUE ); // draw in blue
48: gg.fillRect( 1, 1, 3, 3 ); // draw a filled rectangle
49: gg.setColor( Color.RED ); // draw in red
50: gg.fillRect( 4, 4, 3, 3 ); // draw a filled rectangle
51:
52: // paint buffImage onto the JFrame
53: g2d.setPaint( new TexturePaint( buffImage,
54: new Rectangle( 10, 10 ) ) );
55: g2d.fill(
56: new RoundRectangle2D.Double( 155, 30, 75, 100, 50, 50 ) );
57:
58: // draw 2D pie-shaped arc in white
59: g2d.setPaint( Color.WHITE );
60: g2d.setStroke( new BasicStroke( 6.0f ) );
61: g2d.draw(
62: new Arc2D.Double( 240, 30, 75, 100, 0, 270, Arc2D.PIE ) );
63:
64: // draw 2D lines in green and yellow
65: g2d.setPaint( Color.GREEN );
66: g2d.draw( new Line2D.Double( 395, 30, 320, 150 ) );
67:
68: // draw 2D line using stroke
69: float dashes[] = { 10 }; // specify dash pattern
70: g2d.setPaint( Color.YELLOW );
71: g2d.setStroke( new BasicStroke( 4, BasicStroke.CAP_ROUND,
72: BasicStroke.JOIN_ROUND, 10, dashes, 0 ) );
73: g2d.draw( new Line2D.Double( 320, 30, 395, 150 ) );
74: } // end method paintComponent
75: } // end class ShapesJPanel
76:
77: /**************************************************************************
78: * (C) Copyright 1992-2005 by Deitel & Associates, Inc. and *
79: * Pearson Education, Inc. All Rights Reserved. *
80: * *
81: * DISCLAIMER: The authors and publisher of this book have used their *
82: * best efforts in preparing the book. These efforts include the *
83: * development, research, and testing of the theories and programs *
84: * to determine their effectiveness. The authors and publisher make *
85: * no warranty of any kind, expressed or implied, with regard to these *
86: * programs or to the documentation contained in these books. The authors *
87: * and publisher shall not be liable in any event for incidental or *
88: * consequential damages in connection with, or arising out of, the *
89: * furnishing, performance, or use of these programs. *
90: *************************************************************************/