Question

Write a method in JAVA that does this:

Presents the user with a header stating this is for assignment: Lab, and the names Bob and Bill

Present the user with a menu to run a random method(just make this a dummy method) , another random method method,(just make this a dummy method) or another dummy method (just make this a dummy method)

Repeat the menu until the user enters -1.

Answer 1

Below is your code:

import java.util.Scanner;

public class Assignment {
        public static void main(String[] args) {
                // printing header
                System.out.println("This is for assignment: Lab, Names: Bob and Bill");
                // intializing Scanner to take user input
                Scanner sc = new Scanner(System.in);
                // Initializing variable to get user choice
                int choice = 0;
                // loop to run till user selects Exit
                while (choice != -1) {
                        // printing menu
                        System.out.println("Select a method to run: ");
                        System.out.println("1. Method 1");
                        System.out.println("2. Method 2");
                        System.out.println("3. Method 3");
                        System.out.println("Enter -1 to exit");
                        System.out.print("Enter your choice: ");
                        // getting user input
                        choice = Integer.parseInt(sc.nextLine());
                        // according to input, selecting which method to run
                        if (choice == 1) {
                                printMessage1();
                        } else if (choice == 2) {
                                printMessage2();
                        } else if (choice == 3) {
                                printMessage3();
                        } else if (choice == -1) {
                                // if -1 selected, get out of the loop
                                break;
                        } else {
                                // if invalid input, then print error message.
                                System.out.println("Please enter a correct choice.");
                        }
                }
                // closing the scanner after running the complete program
                sc.close();
        }

        // dummy method 1
        public static void printMessage1() {
                System.out.println("Selected Choice: " + 1);
        }

        // dummy method 2
        public static void printMessage2() {
                System.out.println("Selected Choice: " + 2);
        }

        // dummy method 3
        public static void printMessage3() {
                System.out.println("Selected Choice: " + 3);
        }
}

Output

This is for assignment: Lab, Names: Bob and Bill
Select a method to run:
1. Method 1
2. Method 2
3. Method 3
Enter -1 to exit
Enter your choice: 1
Selected Choice: 1
Select a method to run:
1. Method 1
2. Method 2
3. Method 3
Enter -1 to exit
Enter your choice: 3
Selected Choice: 3
Select a method to run:
1. Method 1
2. Method 2
3. Method 3
Enter -1 to exit
Enter your choice: 2
Selected Choice: 2
Select a method to run:
1. Method 1
2. Method 2
3. Method 3
Enter -1 to exit
Enter your choice: 2
Selected Choice: 2
Select a method to run:
1. Method 1
2. Method 2
3. Method 3
Enter -1 to exit
Enter your choice: 3
Selected Choice: 3
Select a method to run:
1. Method 1
2. Method 2
3. Method 3
Enter -1 to exit
Enter your choice: 5
Please enter a correct choice.
Select a method to run:
1. Method 1
2. Method 2
3. Method 3
Enter -1 to exit
Enter your choice: 1
Selected Choice: 1
Select a method to run:
1. Method 1
2. Method 2
3. Method 3
Enter -1 to exit
Enter your choice: -1