Question

Write a program called Assignment3 (saved in a file Assignment3 .java) that asks a user to enter two strings.

First, the program prompts: Please enter a string.

The program should read in the string, and prompts: Please enter another string.

The program reads in two strings and it prints a menu to the user.

The program asks for user to enter an option and performs one of the following:

Here are the options on the menu:

Option a: checks if the length of the two strings are the same.

Option b: checks if two strings are same or different.

Option c: checks which string is lexically larger, or if they are same

Option d: prints out the first character (index 0) of each string

Option e: prints out a new string consisting of the first string concatenated (appended) with the second string.

Option f: prints out two strings using upper case letters.

Option q: quit the program.

Answer 1

// Please find the required solution

import java.util.Scanner;

// Assignment class performs string operations with menu
public class Assignment3 {
    public static void main(String[] args) {

        // instantiate scanner to read input from keyboard
        Scanner input = new Scanner(System.in);
        char option;

        // read string 1
        System.out.println("Enter String:");
        String s1 = input.nextLine();

        // read string 1
        System.out.println("Enter Another String:");
        String s2 = input.nextLine();

        // print menu as given in question
        System.out.println("-------Menu-------");
        System.out.println("Option a: checks if the length of the two strings are the same");
        System.out.println("Option b: checks if two strings are same or different");
        System.out.println("Option c: checks which string is lexically larger, or if they are same");
        System.out.println("Option d: prints out the first character (index 0) of each string");
        System.out.println("Option e: prints out a new string consisting of the first string concatenated (appended) with the second string");
        System.out.println("Option f: prints out two strings using upper case letters");
        System.out.println("Option q: quit the program");

        // perform above operations on string
        do {
            System.out.println("Enter the option:");
            option = input.nextLine().charAt(0);
            switch (option) {
                case 'a':
                    System.out.println("Two String Lengths are " + (s1.length() == s2.length() ? "same" : "different"));
                    break;
                case 'b':
                    System.out.println("Two strings are " + (s1.equals(s2) ? "same" : "different"));
                    break;
                case 'c':
                    int value = s1.compareTo(s2);
                    if (value == 0)
                        System.out.println("Two strings are Lexically same.");
                    else if (value > 0)
                        System.out.println(s1 + " is lexically larger");
                    else
                        System.out.println(s2 + " is lexically larger");
                    break;
                case 'd':
                    System.out.println("First characters :");
                    System.out.println(s1.charAt(0) + "  " + s2.charAt(0));
                    break;
                case 'e':
                    String newString = s1.concat(s2);
                    System.out.println(newString);
                    break;
                case 'f':
                    System.out.println("Upper case of s1:" + s1.toUpperCase());
                    System.out.println("Upper case of s2:" + s2.toUpperCase());
                    break;
                case 'q':
                    System.out.println("you have selected to quit:");
                    break;
                default:
                    System.out.println("Invalid option Selected please try again");
            }
        }
        while (option != 'q');


        input.close();
    }
}

sample screenshot: