Introduction - Java Concepts - page 42

΢΢ Exercise P1.8. Type in and run the following program:

import javax.swing.JOptionPane;
public class DialogViewer
{
public static void main(String[] args)
{
String name =
JOptionPane.showInputDialog("What is your name?");
System.out.println(name);
System.exit(0);
}
}

Then modify the program to print ȒHello, name!ȓ, displaying the name that
the user typed in.

Additional programming exercises are available in WileyPLUS.

PROGRAMMING PROJECTS

΢΢΢ Project 1.1. This project builds on Exercises P1.7 and P1.8. Your
program should read the user's name, then show a sequence of two dialog
boxes:

¤ First, an input dialog box that asks: ȒWhat would you like me to
do?ȓ

¤ Then a message dialog box that says: ȒI'm sorry, (your name). I'm
afraid I can't do that.ȓ

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ANSWERS TO SELF-CHECK QUESTIONS

1. A program that reads the data on the CD and sends output to the speakers
and the screen.

2. A CD player can do one thingȌplay music CDs. It cannot execute programs.

3. NoȌthe program simply executes the instruction sequences that the
programmers have prepared in advance.