Huge Sell on Popular Electronics
PluginApplet.jsp Page that demonstrates the use of jsp:plugin. Requires you to compile and install PluginApplet.java, TextPanel.java, DrawingPanel.java, and WindowUtilities.java Since these are classes sent to the client to used by applets, the .class files should be in the same directory as the JSP page, not in the WEB-INF/classes directory where classes the server uses go. Uses the JSP-Styles style sheet. Warning: Allaire JRun 3.0 SP2 does not properly support jsp:plugin.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<!--
Example of using jsp:plugin for an applet that uses Java 2.
Taken from Core Web Programming Java 2 Edition
from Prentice Hall and Sun Microsystems Press,
.
May be freely used or adapted.
-->
<HTML>
<HEAD>
<TITLE>Using jsp:plugin</TITLE>
<LINK REL=STYLESHEET
HREF="JSP-Styles.css"
TYPE="text/css">
</HEAD>
<BODY>
<TABLE BORDER=5 ALIGN="CENTER">
<TR><TH CLASS="TITLE">
Using jsp:plugin</TABLE>
<P>
<CENTER>
<jsp:plugin type="applet"
code="PluginApplet.class"
width="370" height="420">
</jsp:plugin>
</CENTER>
</BODY>
</HTML>
PluginApplet.java
import javax.swing.*;
/** An applet that uses Swing and Java 2D and thus requires
* the Java Plug-In.
* <P>
* Taken from Core Web Programming Java 2 Edition
* from Prentice Hall and Sun Microsystems Press,
* .
* May be freely used or adapted.
*/
public class PluginApplet extends JApplet {
public void init() {
WindowUtilities.setNativeLookAndFeel();
setContentPane(new TextPanel());
}
}
TextPanel.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/** JPanel that places a panel with text drawn at various angles
* in the top part of the window and a JComboBox containing
* font choices in the bottom part.
* <P>
* Taken from Core Web Programming Java 2 Edition
* from Prentice Hall and Sun Microsystems Press,
* .
* May be freely used or adapted.
*/
public class TextPanel extends JPanel
implements ActionListener {
private JComboBox fontBox;
private DrawingPanel drawingPanel;
public TextPanel() {
GraphicsEnvironment env =
GraphicsEnvironment.getLocalGraphicsEnvironment();
String[] fontNames = env.getAvailableFontFamilyNames();
fontBox = new JComboBox(fontNames);
setLayout(new BorderLayout());
JPanel fontPanel = new JPanel();
fontPanel.add(new JLabel("Font:"));
fontPanel.add(fontBox);
JButton drawButton = new JButton("Draw");
drawButton.addActionListener(this);
fontPanel.add(drawButton);
add(fontPanel, BorderLayout.SOUTH);
drawingPanel = new DrawingPanel();
fontBox.setSelectedItem("Serif");
drawingPanel.setFontName("Serif");
add(drawingPanel, BorderLayout.CENTER);
}
public void actionPerformed(ActionEvent e) {
drawingPanel.setFontName((String)fontBox.getSelectedItem());
drawingPanel.repaint();
}
}
DrawingPanel.java
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
/** A window with text drawn at an angle. The font is
* set by means of the setFontName method.
* <P>
* Taken from Core Web Programming Java 2 Edition
* from Prentice Hall and Sun Microsystems Press,
* .
* May be freely used or adapted.
*/
class DrawingPanel extends JPanel {
private Ellipse2D.Double circle =
new Ellipse2D.Double(10, 10, 350, 350);
private GradientPaint gradient =
new GradientPaint(0, 0, Color.red, 180, 180, Color.yellow,
true); // true means to repeat pattern
private Color[] colors = { Color.white, Color.black };
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D)g;
g2d.setPaint(gradient);
g2d.fill(circle);
g2d.translate(185, 185);
for (int i=0; i<16; i++) {
g2d.rotate(Math.PI/8.0);
g2d.setPaint(colors[i%2]);
g2d.drawString("jsp:plugin", 0, 0);
}
}
public void setFontName(String fontName) {
setFont(new Font(fontName, Font.BOLD, 35));
}
}
WindowUtilities.java
import javax.swing.*;
import java.awt.*;
/** A few utilities that simplify using windows in Swing.
* <P>
* Taken from Core Web Programming Java 2 Edition
* from Prentice Hall and Sun Microsystems Press,
* .
* May be freely used or adapted.
*/
public class WindowUtilities {
/** Tell system to use native look and feel, as in previous
* releases. Metal (Java) LAF is the default otherwise.
*/
public static void setNativeLookAndFeel() {
try {
UIManager.setLookAndFeel
(UIManager.getSystemLookAndFeelClassName());
} catch(Exception e) {
System.out.println("Error setting native LAF: " + e);
}
}
public static void setJavaLookAndFeel() {
try {
UIManager.setLookAndFeel
(UIManager.getCrossPlatformLookAndFeelClassName());
} catch(Exception e) {
System.out.println("Error setting Java LAF: " + e);
}
}
public static void setMotifLookAndFeel() {
try {
UIManager.setLookAndFeel
("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
} catch(Exception e) {
System.out.println("Error setting Motif LAF: " + e);
}
}
/** A simplified way to see a JPanel or other Container.
* Pops up a JFrame with specified Container
* as the content pane.
*/
public static JFrame openInJFrame(Container content,
int width,
int height,
String title,
Color bgColor) {
JFrame frame = new JFrame(title);
frame.setBackground(bgColor);
content.setBackground(bgColor);
frame.setSize(width, height);
frame.setContentPane(content);
frame.addWindowListener(new ExitListener());
frame.setVisible(true);
return(frame);
}
/** Uses Color.white as the background color. */
public static JFrame openInJFrame(Container content,
int width,
int height,
String title) {
return(openInJFrame(content, width, height, title, Color.white));
}
/** Uses Color.white as the background color, and the
* name of the Container's class as the JFrame title.
*/
public static JFrame openInJFrame(Container content,
int width,
int height) {
return(openInJFrame(content, width, height,
content.getClass().getName(),
Color.white));
}
}
