Chapter 2.14, Problem 2.36CP

Explanation of Solution

Program code:

// Import the JOptionPane package to display dialog boxes

import javax.swing.JOptionPane;

// Class declaration

public class CheckPoint {

// Main function

public static void main(String[] args) {

// Declare the required variables

String s;

int age;

/* Display the dialog box to prompt the user to enter age */

s=JOptionPane.showInputDialog("Enter your age");

// Convert the string variable to int value

age = Integer.parseInt(s);

// Display the age in the message box

JOptionPane.showMessageDialog(null, "The age is "+s);

}

}

Dialog box:

A small graphical window, which is used to display a message to the user or to request input from the user, is called as dialog box. In Java, the dialog boxes can be displayed quickly using JOptionPane class.

This class has to be imported in any program before using it, because it not available automatically. The statement which is used to find the JOptionPane class and makes it available for the program is,

import javax...