Category: Root

WindowUtilities.java Simplifies the setting of native look and feel. #################### import javax.swing.*; import java.awt.*;   // For Color and Container classes. /** A few utilities that simplify using windows in Swing.  * ################### public class WindowUtilities {   /** Tell system to use native look and feel, as in previous    *  releases. Metal (Java) LAF …

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/./././././././././. // Give Ship3 a constructor to let the instance variables // be specified when the object is created. /./././././././././ class Ship3 {   public double x, y, speed, direction;   public String name;   public Ship3(double x, double y, double speed,                double direction, String name) {     this.x = x; // “this” differentiates …

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>>>>>>>>>>>>>>>>> import java.awt.*; /** An example of creating a custom dashed line for drawing.  *  ********************* public class DashedStrokeExample extends FontExample {   public void paintComponent(Graphics g) {     clear(g);     Graphics2D g2d = (Graphics2D)g;     drawGradientCircle(g2d);     drawBigString(g2d);     drawDashedCircleOutline(g2d);   }   protected void drawDashedCircleOutline(Graphics2D g2d) {     g2d.setPaint(Color.blue);     // 30-pixel line, …

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CircleListener.java A subclass of MouseAdapter that draws a circle wherever mouse was pressed. Illustrates first approach to event-handling with listeners: attaching a separate listener *********** import java.applet.Applet; import java.awt.*; import java.awt.event.*; /** The listener used by CircleDrawer1. Note call  *  to getSource to obtain reference to the applet.  *    *************** public class CircleListener extends …

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/././././././ 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 …

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# 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 …

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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 …

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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 …

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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 …

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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(); …

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