****************** ShowArgs.java Application that reports all command-line arguments. ****************** */ public class ShowArgs { public static void main(String[] args) { for(int i=0; i
Tag: code
Aug 29
DropBall.java Uses a while loop to determine how long it takes a ball to fall from the top of the Washington Monument to the ground
DropBall.java Uses a while loop to determine how long it takes a ball to fall from the top of the Washington Monument to the ground ************************************************************ /** Simulating dropping a ball from the top of the Washington * Monument. The program outputs the height of the ball each * second until the ball hits the …
Aug 29
NumFormat.java Formats real numbers with DecimalFormat.
import java.text.*; /** Formatting real numbers with DecimalFormat. * * Taken from Core Web Programming from * Prentice Hall and Sun Microsystems Press, * . * © 2001 Marty Hall and Larry Brown; * may be freely used or adapted. */ public class NumFormat { public static void main (String[] args) { DecimalFormat …
Aug 29
ModificationTest.java Demonstrates changing fields of an object. Inherits from ReferenceTest.java.
/** Taken from Core Web Programming from * Prentice Hall and Sun Microsystems Press, * . * © 2001 Marty Hall and Larry Brown; * may be freely used or adapted. */ import java.awt.Point; public class ModificationTest extends ReferenceTest { public static void main(String[] args) { Point p1 = new Point(1, 2); // …
Aug 29
Tests the class type of an object using the isInstance method (preferred over instanceof operator).
/** Taken from Core Web Programming from * Prentice Hall and Sun Microsystems Press, * . * © 2001 Marty Hall and Larry Brown; * may be freely used or adapted. */ interface Barking {} class Mammal {} class Canine extends Mammal {} class Dog extends Canine implements Barking {} class Retriever extends Dog {} …
Aug 29
URLTest.java Demonstrates try/catch blocks.
/** Taken from Core Web Programming from * Prentice Hall and Sun Microsystems Press, * . * © 2001 Marty Hall and Larry Brown; * may be freely used or adapted. */ // Further simplified getURL method. public URL getURL() { if (url != null) { return(url); } …
Aug 29
ExecTest.java illustrates use of the Exec class.
/** A test of the Exec class. * * Taken from Core Web Programming from * Prentice Hall and Sun Microsystems Press, * . * © 2001 Marty Hall and Larry Brown; * may be freely used or adapted. */ public class ExecTest { public static void main(String[] args) { // Note: no …
Aug 29
DropBall.java Uses a while loop to determine how long it takes a ball to fall from the top of the Washington Monument to the ground.
/** Simulating dropping a ball from the top of the Washington * Monument. The program outputs the height of the ball each * second until the ball hits the ground. * * Taken from Core Web Programming from * Prentice Hall and Sun Microsystems Press, * . * © 2001 Marty Hall and Larry Brown; …
Aug 29
Loading Images
JavaMan1.java Applet that loads an image from a relative URL. ************************************************************* import java.applet.Applet; import java.awt.*; /** An applet that loads an image from a relative URL. * >>>>>>>>>>>>>>>>>>> public class JavaMan1 extends Applet { private Image javaMan; public void init() { javaMan = getImage(getCodeBase(),”images/Java-Man.gif”); } public void paint(Graphics g) { …
Aug 29
Basic template for a Java applet
AppletTemplate.java >>>>>>>>>>>>>>>>>>>> import java.applet.Applet; import java.awt.*; ******************** public class AppletTemplate extends Applet { // Variable declarations. public void init() { // Variable initializations, image loading, etc. } public void paint(Graphics g) { // Drawing operations. } } >>>>>>>>>>>>>>>>>>>>>
