JAVA hwk help

import java.util.Scanner; /** * Console menu is a general purpose class data type that makes a * menu object for interacting with a user over a console (or terminal) * window. This is useful for text-based programs to present the user * with a set of numbered options to choose from. The menu itself can * also handle communicating with the user on the console window in * order to get the user's choice on a menu. This class is written with beginners * in mind, and includes no looping or smart processing of data. Therefore, the menu needs * to know the total number of options in order to make sure that a user's choice is between 1 and * the maximum number in the menu. The String options that is passed in to the menu must itself * be formatted to display nicely on the terminal window. For Example, here is a sample String for a * menu, notice the numbering and the "\n" to indicate line breaks. * <p><pre> * String sampleMenuOptions = "1: Plain Small Coffee\n2: Plain small coffee with cream\n" * <br> + "3: Medium Cold Brew Over Ice\n4: Large Hot Pumpkin Latte\n" * <br> + "5: Coffee order\n"; * </p></pre><p> * The menu can also have a programmer-supplied title, if none is given, the menu is printed with no header * <pre> <br>String sampleTitle = "************* COFFEE MENU *************" * </pre> * </p> * @author Kendra Walther * @version Fall 2017 */ public class ConsoleMenu { //Instance Variables private String title; // The title for the menu private final String options; // The text in the menu private final int numOptions; // The total number of options in the menu /** * ConsoleMenu Constructor - makes a new Menu object with the given information * * @param title The title to appear at the top of the menu * @param options A string that contains all the menu options. Please note: All items in the * string should be numbered, starting at the number 1 and * should have include "\n" for line breaks between the menu choices * @param numOptions an int, indicating the total number of options stored in the menu options */ public ConsoleMenu(String title, String options, int numOptions){ this.title = title; this.options = options; this.numOptions = numOptions; } /** * ConsoleMenu Constructor - makes a new Menu object with no title on top * * @param options A string that contains all the menu options. Please note: this string * should have include "\n" for line breaks between the menu choices * @param numOptions an int, indicating the total number of options stored in the menu options */ public ConsoleMenu(String options, int numOptions){ this("", options, numOptions); } /** * Method printMenu: will print the menu, including the optional menu title * */ public void printMenu(){ System.out.println(title); System.out.println(options); } /** * Method getUserChoice: This method will ask the user (via the console window) * and use Scanner to read in the user's menu option and * will return either a valid number (one that corresponds to one of the menu items) or the * number -1 if the user entered "wrong" data. * * @return The return value */ public int getUserChoice(){ System.out.println("What number option would you like?"); Scanner sc = new Scanner(System.in); int num = sc.nextInt(); if(num >= 1 && num <= numOptions){ // the user-entered number is valid return num; } else{ System.out.println("Oops. Not a valid choice for this menu."); return -1; // the value for "wrong" data } } }