Java Programming Assignment: User Menu with Conversion and Honors Methods

Assignment Prompt

Write a Java program that does the following:

1. Prompt the user to select an action:

   • a. Convert cubic feet to U.S. bushels

   • b. Convert miles to kilometers

   • c. Determine graduation with honors title

   • d. Exit program

2. Your program must have at least these methods:

   • a. A method to convert cubic feet to U.S. bushels (accepts cubic feet, returns bushels)

   • b. A method to convert miles to kilometers (accepts miles, returns kilometers)

   • c. A method to determine graduation honors title (accepts GPA, returns honors title string)

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Java Solution

java

import java.util.Scanner;

public class MenuConversions {

    // Convert cubic feet to US bushels (1 cubic foot = 0.803564 US bushels)
    public static double cubicFeetToBushels(double cubicFeet) {
        return cubicFeet * 0.803564;
    }

    // Convert miles to kilometers (1 mile = 1.60934 kilometers)
    public static double milesToKilometers(double miles) {
        return miles * 1.60934;
    }

    // Determine honors title based on GPA
    public static String honorsTitle(double gpa) {
        if (gpa >= 3.9) return "Summa Cum Laude";
        else if (gpa >= 3.7) return "Magna Cum Laude";
        else if (gpa >= 3.5) return "Cum Laude";
        else if (gpa >= 2.0) return "No Honors";
        else return "Not Eligible for Graduation";
    }

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        boolean keepRunning = true;

        while (keepRunning) {
            // Show menu
            System.out.println("\nChoose an action:");
            System.out.println("a. Convert cubic feet to U.S. bushels");
            System.out.println("b. Convert miles to kilometers");
            System.out.println("c. Determine graduation with honors title");
            System.out.println("d. Exit program");
            System.out.print("Enter your choice (a/b/c/d): ");
            String choice = scanner.nextLine().trim().toLowerCase();

            switch (choice) {
                case "a":
                    System.out.print("Enter cubic feet: ");
                    double cubicFeet = scanner.nextDouble();
                    scanner.nextLine(); // consume leftover newline
                    double bushels = cubicFeetToBushels(cubicFeet);
                    System.out.printf("%.2f cubic feet = %.2f US bushels%n", cubicFeet, bushels);
                    break;
                case "b":
                    System.out.print("Enter miles: ");
                    double miles = scanner.nextDouble();
                    scanner.nextLine(); // consume leftover newline
                    double kilometers = milesToKilometers(miles);
                    System.out.printf("%.2f miles = %.2f kilometers%n", miles, kilometers);
                    break;
                case "c":
                    System.out.print("Enter GPA: ");
                    double gpa = scanner.nextDouble();
                    scanner.nextLine(); // consume leftover newline
                    String honors = honorsTitle(gpa);
                    System.out.println("Honors Title: " + honors);
                    break;
                case "d":
                    keepRunning = false;
                    System.out.println("Exiting program. Goodbye!");
                    break;
                default:
                    System.out.println("Invalid input. Please enter a, b, c, or d.");
            }
        }
        scanner.close();
    }
}

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How to Run

1. Save the code above as MenuConversions.java.

2. Compile:

   
   
   javac MenuConversions.java
   

3. Run:

   
   java MenuConversions
   

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