Question

In this same program I need to create a new method called “int findItem(String[] shoppingList, String item)” that takes an array of strings that is a shopping list and a string for an item name and searches through the “shoppingList” array for find if the “item” exists. If it does exist print a confirmation and return the item index. If the item does not exist in the array print a failure message and return -1.

import java.util.Scanner;

public class ShoppingList {

// Scanner that takes user input

static Scanner in = new Scanner(System.in);

public static String[] makeShoppingList(int size) {

// Initializing the array

String [] Groceries= new String[size];

for (int i=0; i<Groceries.length; i++) {

System.out.println("Enter an item: ");

// storing user input into the array

Groceries[i]=in.nextLine();

}

// return the array

return Groceries;

}

public static void main(String[]args) {

//not sure if this is what was supposed to be done but i could not figure out how to get a sentinel to determine size.

System.out.println("How many items are there?: ");

int size = in.nextInt();

in.nextLine();

String[]Groceries= makeShoppingList(size);

System.out.println("Your shopping list is: ");

//for loop for printing back out their shopping list

for (int i=0;i<Groceries.length;i++) {

System.out.println(Groceries[i]);

}

}

}

Answer 1

import java.util.Scanner;

public class ShoppingList {
    // Scanner that takes user input
    static Scanner in = new Scanner(System.in);

    public static String[] makeShoppingList(int size) {
// Initializing the array
        String[] Groceries = new String[size];
        for (int i = 0; i < Groceries.length; i++) {
            System.out.println("Enter an item: ");
// storing user input into the array
            Groceries[i] = in.nextLine();
        }
// return the array
        return Groceries;
    }

    public static int findItem(String[] shoppingList, String item) {
        int index = -1;
        for (int i = 0; i < shoppingList.length; i++) {
            if (shoppingList[i].equals(item)) {
                index = i;
            }
        }
        if (index == -1) {
            System.out.println(item + " is not found in the grocery list");
        } else {
            System.out.println(item + " is found in the grocery list");
        }
        return index;
    }

    public static void main(String[] args) {
//not sure if this is what was supposed to be done but i could not figure out how to get a sentinel to determine size.
        System.out.println("How many items are there?: ");
        int size = in.nextInt();
        in.nextLine();
        String[] Groceries = makeShoppingList(size);
        System.out.println("Your shopping list is: ");
//for loop for printing back out their shopping list
        for (int i = 0; i < Groceries.length; i++) {
            System.out.println(Groceries[i]);
        }
        System.out.println("Enter an item to search for: ");
        String item = in.nextLine();
        int index = findItem(Groceries, item);
        if (index != -1) {
            System.out.println(item + " is found at index " + index);
        }
    }
}