/././././././ GridTest.java Six buttons arranged in a 2 row x 3 column grid by GridLayout.GridLayout divides the window into equal-sized rectangles based upon the number of rows and columns specified. ****************** import java.applet.Applet; import java.awt.*; /** An example of GridLayout. * /./././././. public class GridTest extends Applet { public void init() { setLayout(new …
Category: Java/J2EE/J2ME
Aug 26
ListEvent2.java
# ListEvents.java Uses the following classes: * CloseableFrame.java * SelectionReporter.java * ActionReporter.java /././././././././././././ import java.awt.event.*; /././././././ public class ListEvents2 extends ListEvents { public static void main(String[] args) { new ListEvents2(); } /** Extends ListEvents with the twist that * typing any of the letters of “JAVA” or …
Aug 26
A Frame that can actually quit
import java.awt.*; import java.awt.event.*; /** A Frame that you can actually quit. Used as the starting * point for most Java 1.1 graphical applications. * public class CloseableFrame extends Frame { public CloseableFrame(String title) { super(title); enableEvents(AWTEvent.WINDOW_EVENT_MASK); } /** Since we are doing something permanent, we need * to …
Aug 26
creating a simple Swing application using a JFrame
JFrameExample.java Demonstrates creating a simple Swing application using a JFrame. As with a JApplet, components must be added to the content pane, instead of the window directly.import java.awt.*; import javax.swing.*; /** Tiny example showing the main difference in using * JFrame instead of Frame: using the content pane * and getting the Java (Metal) look …
Aug 26
Explicit placement of five buttons with the layout manager turned off
NullTest.java Explicit placement of five buttons with the layout manager turned off (set to null) ########################## import java.applet.Applet; import java.awt.*; /** Layout managers are intended to help you, but there * is no law saying you have to use them. * Set the layout to null to turn them off. * ******************* public class NullTest …
Aug 26
JTree Examples
SimpleTree.java Basic tree built out of DefaultMutableTreeNodes. A DefualtMutableTreeNode is a starting point for a root node, in which children nodes can be added. import java.awt.*; import javax.swing.*; import javax.swing.tree.*; /** Example tree built out of DefaultMutableTreeNodes. * */ public class SimpleTree extends JFrame { public static void main(String[] args) { new SimpleTree(); …
Aug 26
Printing in Java 2
* o PrintExample.java Demonstrates printing a Graphics2D object. import java.awt.*; import javax.swing.*; import java.awt.event.*; import java.awt.print.*; /** An example of a printable window in Java 1.2. The key point * here is that any component is printable in Java 1.2. * However, you have to be careful to turn off double buffering * …
Aug 26
BetterCircleTest.java
********************** BetterCircleTest.java ********************** import java.awt.*; import java.applet.Applet; /** Position circles down the diagonal so that their borders * just touch. Illustrates that Java 1.1 lightweight * components can be partially transparent. * */ public class BetterCircleTest extends Applet { public void init() { setBackground(Color.lightGray); setLayout(null); BetterCircle circle; int radius …
Aug 25
RMI Example – Numerical Integration, a more realistic RMI example that sends an evaluatable object (function) from a client to a server for numerical integration.
Integral.java Performs actual numerical integration of the function (evaluatable object). /** A class to calculate summations and numeric integrals. The * integral is calculated according to the midpoint rule. * * Taken from Core Web Programming from * Prentice Hall and Sun Microsystems Press, * . * © 2001 Marty Hall and Larry Brown; * …
Aug 25
A JPanel that displays six radio buttons with labels.
A JPanel that displays six radio buttons with labels. import java.awt.*; import javax.swing.*; /** A JPanel that displays six JRadioButtons. * *. */ public class SixChoicePanel extends JPanel { public SixChoicePanel(String title, String[] buttonLabels) { super(new GridLayout(3, 2)); setBackground(Color.lightGray); setBorder(BorderFactory.createTitledBorder(title)); ButtonGroup group = new ButtonGroup(); JRadioButton option; int …
