Source of ExerciseEchoNumber.java

Structures and functions

public class ExerciseEchoNumber

  1: 
  2: import javax.swing.*;
  3: 
  4: public class ExerciseEchoNumber
  5: {
  6:    public static void main(String[] args)
  7:    {
  8:       String numberString;
  9:       numberString =
 10:       JOptionPane.showInputDialog("Enter a whole number:");
 11:       JOptionPane.showMessageDialog(
 12:          null, "The number is " + numberString);
 13:       System.exit(0);
 14:    }
 15: }