ArrayMenu.java

import java.util.InputMismatchException;
import java.util.Scanner;

public class ArrayMenu implements MenuInterface {
    private String title;
    private String[] options;
    private int maxSize;
    private int currentSize;

    public ArrayMenu(String title, String[] options, int maxSize) {
        if (options == null) {
            throw new NullPointerException("Options array cannot be null");
        }
        if (maxSize < options.length) {
            throw new IllegalArgumentException("Maximum size cannot be less than number of starting options");
    }

        this.title = title;
        this.options = options;
        this.maxSize = maxSize;
        this.currentSize = 0; //options.length
    }

    public ArrayMenu(String title, String[] options) {
        this(title, options, options.length);
    }

    public ArrayMenu(String title) {
        this(title, new String[1], 1);
    }

    public ArrayMenu(String[] options) {
        this(null, options, options.length);
    }

    public ArrayMenu(String title, int maxSize) {
        this(title, new String[Math.max(0,maxSize)], maxSize);
    if(maxSize<0)throw new IllegalArgumentException("Max Size must be a positive number.");
    }

    public ArrayMenu(int maxSize) {
        this(null, new String[Math.max(maxSize,0)], maxSize);
    if(maxSize<0)throw new IllegalArgumentException("Max Size must be a positive number.");
    }

    public ArrayMenu() {
        this(null, new String[1], 1);
    }
      public String getTitle(){
        return title;
    }

    public boolean addOption(String option) {
    //if(options==null) options = new String[1];
        if (currentSize == maxSize) {
            System.out.println("Cannot add more options. Maximum size reached.");
            return false;
        }
        options[currentSize++] = option;
        return true;
    }
     public String[] getOptions(){
       return options;
    }
    public boolean setTitle(String menuTitle){
        if(this.title != null){
            this.title = menuTitle;
            return true;
        }
        this.title = menuTitle;
        return false;
    }
    public boolean addOptions(String[] options){
        if(this.currentSize >= this.maxSize){
        System.out.println("Debug: Severe error here!");
            return false;
        }
        for(int i=0;i<options.length;i++){
            if(this.currentSize >= this.maxSize){
                break;
            }
            this.options[this.currentSize] = options[i];
            this.currentSize++;
        }
        return true;
    }


    public void removeOption(String option) {
        for (int i = 0; i < currentSize; i++) {
            if (options[i].equals(option)) {
                for (int j = i; j < currentSize - 1; j++) {
                    options[j] = options[j + 1];
                }
                currentSize--;
                break;
            }
        }
    }

    public int getChoice(Scanner in) throws IllegalStateException {
    if (currentSize == 0) {
        throw new IllegalStateException("This Menu has no options.");
    }

    int choice = -1;
    int tries = 0;
    while (tries < 3) {
        System.out.println("Enter your choice: ");
        try {
            choice = in.nextInt();
        break;
        } catch (InputMismatchException e) {
            System.out.println("Invalid input. Please try again.");
            in.nextLine();
        }
        tries++;
    }
    if(tries<3)return choice;
    else return -1;
}


    public void display() {
        if (title != null) {
            System.out.println(title);
        }
        for (int i = 0; i < currentSize; i++) {
            System.out.println((i + 1) + ". " + options[i]);
        }
    }


}