RedditHelp

import java.util.Arrays;
import java.util.Scanner;
import java.util.stream.IntStream;

public class RedditHelp {

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.print("Enter the String: ");
        String entered = scan.nextLine();

        String[] split = entered.trim().split(" ");
        String[] resultString = new String[split.length];

        // end for-loop
        IntStream.range(0, split.length).forEach(i -> {
            if (isNumeric(split[i])) {
                switch (Integer.parseInt(split[i])) {
                    case 1 -> resultString[i] = "one";
                    case 2 -> resultString[i] = "two";
                    case 3 -> resultString[i] = "three";
                    case 4 -> resultString[i] = "four";
                    case 5 -> resultString[i] = "five";
                    case 6 -> resultString[i] = "six";
                    case 7 -> resultString[i] = "seven";
                    case 8 -> resultString[i] = "eight";
                    case 9 -> resultString[i] = "nine";
                    default -> resultString[i] = "zero";
                } // end switch

            } else {
                if (split[i].equalsIgnoreCase("+")) {
                    resultString[i] = "plus";
                } else if (split[i].equalsIgnoreCase("-")) {
                    resultString[i] = "minus";
                } else if (split[i].equalsIgnoreCase("*")) {
                    resultString[i] = "times";
                } else if (split[i].equalsIgnoreCase("/")) {
                    resultString[i] = "divided by";
                }
            }
        });

        for (int j = 0; j < resultString.length; j++) {
            if (j == 0) {
                System.out.print(resultString[j].substring(0, 1).toUpperCase() + resultString[j].substring(1));
            } else {
                System.out.print(resultString[j]);
            }
            System.out.print(" ");
        }
        System.out.println("equals " + (Integer.parseInt(split[0]) + Integer.parseInt(split[2])) + ".");

    } // end main()

    private static boolean isNumeric(String str) {
        try {
            Integer.parseInt(str);
            return true;
        } catch(NumberFormatException e){
            return false;
        }
    }
}