grocery application in java

//This is our Main class. inside this class, we will implement our GroceryList class.

import java.util.ArrayList;
import java.util.Scanner;



public class Main {

	private static Scanner scanner = new Scanner(System.in);
	private static GroceryList groceryList = new GroceryList();


	public static void main(String[] args) {


		boolean quit = false;
		int choice = 0;
		printInstructions();

		while(!quit) {
			System.out.println("Enter Your Choice");
			choice = scanner.nextInt();
			scanner.nextLine();


			switch (choice) {
			case 0:
				printInstructions();
				break;

			case 1:
				groceryList.printGroceryList();

				break;

			case 2:
				addItem();
				break;

			case 3 :
				modifyItem();
				break;

			case 4:
				removeItem();
				break;

			case 5:
				searchForItem();
				break;

			case 6:
				processArrayList();
				break;

			case 7:
				quit= true;
				break;
			}
		}


		System.out.println("*********************************************************\r");

		ArrayList<String> myToDoList = new ArrayList<String>();

		myToDoList.add("Write an articel");
		myToDoList.add("Make a Youtube Video");
		myToDoList.add("Make a salad for dinner");

		System.out.println(myToDoList.size());

		myToDoList.set(0, "Dont forget things");
		myToDoList.set(1, "Buy milk and orange juice");

		myToDoList.remove(0);


		for(int i = 0; i < myToDoList.size(); i++) {
			System.out.println("Item No " + (i) + " - "+ myToDoList.get(i));
		}

	}

	public static void printInstructions() {
		System.out.println("\nPress");
		System.out.println("\t 0 - To Print The Instructions ");
		System.out.println("\t 1 - To Print GroceryList ");
		System.out.println("\t 2 - To Add Item ");
		System.out.println("\t 3 - To Modify item ");
		System.out.println("\t 4 - To Remove Item ");
		System.out.println("\t 5 - To Search for an Item ");
		System.out.println("\t 6 - To Process Array List. ");
		System.out.println("\t 7 - To Not Continue");
	}

	public static void addItem() {
		System.out.print("Add : Please enter the grocery Item : ");
		groceryList.addGroceryItem(scanner.nextLine());
	}

	public static void modifyItem() {
		System.out.print("Modify : Enter the Item: ");
		String curItem = scanner.nextLine();		

		System.out.print("Modify : Enter the Replacement Item");
		String newItem = scanner.nextLine();

		groceryList.modifyGroceryItem(curItem, newItem);
	}

	public static void removeItem() {
		System.out.print("Remove : Enter the Item: ");
		String itemNo = scanner.nextLine();
		groceryList.removeItem(itemNo);
		System.out.print("msg: The Item has been removed");
		groceryList.printGroceryList();
	}

	 public static void searchForItem() {
	        System.out.print("Item to search for: ");
	        String searchItem = scanner.nextLine();
	        if(groceryList.onFile(searchItem)) {
	        	System.out.println("Item " + searchItem + " is on the list");
	        }else{
	        	System.out.println(searchItem + " is not in the list");
	        }
	    }

	 public static void processArrayList() {

		 ArrayList<String> newArrayList = new ArrayList<String>();
		 newArrayList.addAll(groceryList.getGroceryList());


		 ArrayList<String> anotherArrayList = new ArrayList<>(groceryList.getGroceryList());

		 String[] myArray = new String[groceryList.getGroceryList().size()];
		 myArray = groceryList.getGroceryList().toArray(myArray);
	 }

	}
}

//Here is our Grocerylist Class with all the functionality.

//File : GroceryList.java


import java.util.ArrayList;

public class GroceryList {

	private ArrayList<String> groceryList = new ArrayList<String>();



	public ArrayList<String> getGroceryList() {
		return groceryList;
	}

	public void setGroceryList(ArrayList<String> groceryList) {
		this.groceryList = groceryList;
	}

	public void addGroceryItem(String item) {
		groceryList.add(item);
	}

	public void printGroceryList() {
		System.out.println("You Have "+ groceryList.size() + " item in your grocery list");
		for(int i = 0; i < groceryList.size(); i ++) {
			System.out.println((i+1) +" . "+groceryList.get(i));
		}
	}

	public void modifyGroceryItem(String currentItem, String newItem) {
		int position = findItem(currentItem);
		if(position >= 0) {
			modifyGroceryItem(position , newItem);
		}
	}

	private void modifyGroceryItem(int position , String item) {
		groceryList.set(position, item);
		System.out.println("Grocery Item " + (item) + " has been modified");
	}

	public void removeItem(String item) {
		int position = findItem(item);
		if(position >= 0) {
			removeItem(position);
		}
	}

	private void removeItem(int position) {
		groceryList.remove(position);
	}

	private int findItem(String searchItem) {

		return groceryList.indexOf(searchItem);

  }

	public boolean onFile(String item) {
		int position = findItem(item);
		if(position >= 0) {
			return true;
		}
		return false;
	}

}