// An Applet program take from Deitel & Deitel, "Java How to Program", // pp. 211 - 213 /** An Applet prgram that draws lines, rectangles, or ovals depending on user's choice; the applet is run with the following html file: This html file (say, named "SwitchTest.html") can be run as follows: appletviewer SwitchTest.html or it can be opened from a web browser such as IE or Netscape (Nov. 22, 2001) */ import java.awt.Graphics; // Java core package import javax.swing.*; // Java extension packages public class SwitchTest extends JApplet { int choice; // user's choice for drawing /** initialize applet by prompting user for choice */ public void init() { // user input String input = JOptionPane.showInputDialog( "Enter 1 to draw lines\n" + "Enter 2 to draw rectangles\n" + "Enter 3 to draw ovals\n"); choice = Integer.parseInt(input); } /** draw shapes on applet's background */ public void paint(Graphics g) { super.paint(g); // call inherited paint() method // draw a chosen shape 10 times for (int i = 0; i < 10; i++) switch (choice) { case 1: g.drawLine(10, 10, 250, 10 + i * 10); break; case 2: g.drawRect(10 + i * 10, 10 + i * 10, 50 + i * 10, 50 + i * 10); break; case 3: g.drawOval(10 + i * 10, 10 + i * 10, 50 + i * 10, 50 + i * 10); break; default: g.drawString("Invalid value entered", 10, 20 + i * 15); } // end of switch } // end of paint() } // end of class SwitchTest