USER-DEFINED METHODS - Java Programming: From Problem Analysis to Program Design - page 425

EXAMPLE 7-12(MENU DRIVEN PROGRAM)

The following is an example of a menu driven program. When the program executes, it
gives the user a list of choices to choose from. It converts length from feet and inches to
meters and centimeters and vice versa. The program contains three methods:
showChoices , inchesToCentimeters , and centimetersToInches . The method
showChoices informs the user how to use the program. The user has the choice to
run the program as long as the user wishes.
//Menu driven program.

import java.util.*;

public class Conversion
{

static Scanner console = new Scanner(System.in);

static final double CONVERSION = 2.54;

public static void main(String[] args)
{

7

int inches;
int centimeters;
int choice;

do
{

showChoices();
choice = console.nextIn();
System.out.println();

switch (choice)
{
case 1:
System.out.print("Enter inches: ");
inches = console.nextInt();
System.out.println();
System.out.printf("%d inch(es) = %d centimeter(s)%n",
inches, inchesToCentimeters(inches));

break ;

case 2:
System.out.print("Enter centimeters: ");
centimeters = console.nextInt();
System.out.println();
System.out.printf("%d centimeter(s) = %d inch(es)%n",
centimeters, centToInches(centimeters));

break ;

case 99:
break ;