Can a expert teach me?

I am writing a program that asks a user to enter any number and it turns it into a roman numeral

Example:

This is how it should work

Enter an Integer: 342 (Could be any number user puts in)

Roman Numeral: CCCXLII

this is what I have in my program can you explain how I can return roman from the arabicToRoman method and have my program work?

import java.util.Scanner;

public class ArabicToRomanNumerals {

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

static int userInput;

static int quit = -1;

public static void main(String[] args) {

// Repeats question until users enters -1 to quit

do {

System.out.print("Enter an integer (-1 to quit): ");

userInput = input.nextInt();

System.out.print("Roman Numeral: ");

if (userInput 3999) {

System.out.print("The Romans did not have a way to represent negative numbers or zeros ");

System.out.print("Enter a valid number: ");

userInput = input.nextInt();

} else if (userInput == quit) {

System.out.print("Goodbye!");

}

} while (userInput != quit);

}

public static String arabicToRoman(int arabic) {

String roman = ""; // string for roman numerals

// array of numbers and calculations

int[] numbers = new int[7];

numbers[0] = arabic / 1000; // Calculation for M

numbers[1] = arabic % 1000 / 500; // Calculation for D

numbers[2] = arabic % 500 / 100; // Calculation for C

numbers[3] = arabic % 100 / 50; // Calculation for L

numbers[4] = arabic % 50 / 10; // Calculation for X

numbers[5] = arabic % 10 / 5; // Calculation for V

numbers[6] = arabic % 5; // Calculation for I

// Roman Numerals String

String[] romanNumerals = new String[] { "M", "D", "C", "L", "X", "V", "I" };

for (int i = 0; i

int number = numbers[i];

if (number == 4) {

roman = roman.substring(0, roman.length() - 1) + romanNumerals[i] + romanNumerals[i - 2];

} else {

for (int index = 0; index

roman += romanNumerals[i];

}

}

}

return roman;

}

}

These are instructions

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