SearchSpec.java ******************* /** Small class that encapsulates how to construct a * search string for a particular search engine. * Taken from Core Web Programming Java 2 Edition * from Prentice Hall and Sun Microsystems Press, * May be freely used or adapted. */ public class SearchSpec { private String name, baseURL, numResultsSuffix; …
Tag: Java
Aug 28
DebugExample.jsp Page that uses the DebugTag custom tag
# DebugExample.jsp Page that uses the DebugTag custom tag <!DOCTYPE HTML PUBLIC “-//W3C//DTD HTML 4.0 Transitional//EN”> <!– Illustration of SimplePrimeTag tag. 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 the Debug Tag</TITLE> <LINK REL=STYLESHEET HREF=”JSP-Styles.css” …
Aug 28
ShearExample.java. Illustrates the effect of applying a shear transformation prior to drawing a square
import javax.swing.*; import java.awt.*; import java.awt.geom.*; /** An example of shear transformations on a rectangle. * *********************** public class ShearExample extends JPanel { private static int gap=10, width=100; private Rectangle rect = new Rectangle(gap, gap, 100, 100); public void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D)g; for (int …
Aug 28
LineStyles.java Provides examples of the available styles for joining line segments
import javax.swing.*; import java.awt.*; import java.awt.geom.*; /** A demonstration of different controls when joining two line * segments. The style of the line end point is controlled * through the capStyle parameter. * ************************************ public class LineStyles extends JPanel { private GeneralPath path; private static int x = 30, deltaX = 150, y …
Aug 28
Illustrates using a local font (Goudy Handtooled BT) to perform drawing in Java 2D
import java.awt.*; /** An example of using local fonts to perform drawing in * Java 2D. * ********************** public class FontExample extends GradientPaintExample { public FontExample() { GraphicsEnvironment env = GraphicsEnvironment.getLocalGraphicsEnvironment(); env.getAvailableFontFamilyNames(); setFont(new Font(“Goudy Handtooled BT”, Font.PLAIN, 100)); } protected void drawBigString(Graphics2D g2d) { g2d.setPaint(Color.black); g2d.drawString(“Java …
Aug 28
Draws a circle with a gradient fill
GradientPaintExample.java Draws a circle with a gradient fill. Inherits from ShapeExample.java. ************************************** import java.awt.*; /** An example of applying a gradient fill to a circle. The * color definition starts with red at (0,0), gradually * changing to yellow at (175,175). * ********************************** public class GradientPaintExample extends ShapeExample { private GradientPaint gradient = …
Aug 28
An applet that permits freehand drawing
import java.applet.Applet; import java.awt.*; import java.awt.event.*; /** An applet that lets you perform freehand drawing. * **************** public class SimpleWhiteboard extends Applet { protected int lastX=0, lastY=0; public void init() { setBackground(Color.white); setForeground(Color.blue); addMouseListener(new PositionRecorder()); addMouseMotionListener(new LineDrawer()); } protected void record(int x, int y) { …
Aug 28
A TextField that uses key events to correct the spelling of the names of computer languages entered into it
import java.awt.*; import java.awt.event.*; /** A spelling-correcting TextField for entering * a language name. * ******************* public class LanguageField extends TextField { private String[] substrings = { “”, “J”, “Ja”, “Jav”, “Java” }; public LanguageField() { addKeyListener(new SpellingCorrector()); addActionListener(new WordCompleter()); addFocusListener(new SubliminalAdvertiser()); } // Put caret …
Aug 28
DebugTag.java Custom tag that optionally makes use of a tag body
DebugTag.java Custom tag that optionally makes use of a tag body package cwp.tags; import javax.servlet.jsp.*; import javax.servlet.jsp.tagext.*; import java.io.*; import javax.servlet.*; /** A tag that includes the body content only if * the “debug” request parameter is set. * <P> * Taken from Core Web Programming Java 2 Edition * from Prentice Hall and Sun …
Aug 28
HeadingTag.java Custom tag that makes use of a tag body
HeadingTag.java Custom tag that makes use of a tag body package cwp.tags; import javax.servlet.jsp.*; import javax.servlet.jsp.tagext.*; import java.io.*; /** Generates an HTML heading with the specified background * color, foreground color, alignment, font, and font size. * You can also turn on a border around it, which normally * just barely encloses the heading, but …
