lab3_1(Java)

package com.company;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Scanner;

public class lab3_1 {
    static Scanner scan = new Scanner(System.in);

    public static void main(String[] args){
        System.out.print("Welcome to the program that count how many times the last word occurs in a sentence.\nSelect the source for entering the sentence:\n1:Console\n2:File\nEnter 1 or 2: ");
        byte inputSource = takeSource();
        String sentence = takeSentence(inputSource);
        String[] arrayOfWords = findArrayOfWords(sentence);
        int answer = findAnswer(arrayOfWords);
        System.out.print("Select the source for output:\n1:Console\n2:File\nEnter 1 or 2: ");
        byte outputSource = takeSource();
        output(outputSource, sentence, answer);
        scan.close();
    }

    public static byte takeSource(){
        boolean isIncorrect;
        byte choice = 0;
        final byte CONSOLE = 1;
        final byte FILE = 2;
        do {
            isIncorrect = false;
            try {
                choice = Byte.parseByte(scan.nextLine());
            } catch (Exception e) {
                System.out.print("Incorrect input!!! Select the source:\n1:Console\n2:File\nEnter 1 or 2: ");
                isIncorrect = true;
            }
            if (!isIncorrect && (choice != CONSOLE) && (choice != FILE)) {
                System.out.print("Incorrect input!!! Select the source:\n1:Console\n2:File\nEnter 1 or 2: ");
                isIncorrect = true;
            }
        } while (isIncorrect);
        return choice;
    }

    public static String takeInPath(){
        String path;
        boolean isIncorrect;
        System.out.print("Enter file path: ");
        do {
            isIncorrect = false;
            path = scan.nextLine();
            if (Files.notExists(Path.of(path))) {
                System.out.print("File is not found\nEnter file path: ");
                isIncorrect = true;
            }
            if (!isIncorrect && (!path.endsWith(".txt"))) {
                System.out.print("File is found, but it is not \".txt\" type file\nEnter file path: ");
                isIncorrect = true;
            }
        }while (isIncorrect);
        return path;
    }

    public static String takeOutPath(){
        String path;
        boolean isIncorrect;
        System.out.print("Enter file path: ");
        do {
            isIncorrect = false;
            path = scan.nextLine();
            if (!path.endsWith(".txt")) {
                System.out.print("It should be a \".txt\" file\nEnter file path: ");
                isIncorrect = true;
            }
        }while (isIncorrect);
        return path;
    }

    public static String takeSentenceFromFile(final String path){
        String sentence = "";
        boolean isCorrect = true;
        try(BufferedReader reader = new BufferedReader(new FileReader(path))) {
            sentence = reader.readLine();
            if ((reader.readLine()) != null){
                isCorrect = false;
                System.out.println("Incorrect file data!!");
            }
        }catch (IOException e) {
            System.out.println("Input/Output error!!!");
            isCorrect = false;
        }
        if(isCorrect) {
            return sentence;
        }else{
            return "";
        }
    }

    public static String takeSentence(final byte source){
        String inPath;
        String sentence;
        if (source == 1) {
            System.out.print("Enter the sentence: ");
            sentence = scan.nextLine();
        } else {
            inPath = takeInPath();
            sentence = takeSentenceFromFile(inPath);
            if (sentence.equals("")){

                inPath = takeInPath();
                sentence = takeSentenceFromFile(inPath);
            }
        }
        return sentence;
    }

    public static String makeSentenceNormal(String sentence){
        sentence = sentence.replace('.', ' ');
        sentence = sentence.replace(',', ' ');
        sentence = sentence.replace('-', ' ');
        sentence = sentence.replace(';', ' ');
        sentence = sentence.replace('!', ' ');
        sentence = sentence.replace('?', ' ');
        sentence = sentence.replace(':', ' ');
        sentence = sentence.replace('—', ' ');
        sentence = sentence.trim();
        return sentence;
    }

    public static String[] findArrayOfWords(String sentence){
        sentence = makeSentenceNormal(sentence);
        String[] arrayOfWords = new String[100];
        int wordsCounter = 0;
        String word;
        int index = sentence.indexOf(" ");
        while (index != -1) {
            word = sentence.substring(0, index);
            if (!word.equals("")) {
                arrayOfWords[wordsCounter] = word;
                wordsCounter++;
            }
            sentence = sentence.substring(index + 1);
            index = sentence.indexOf(" ");
        }
        if (!sentence.equals("")) {
            arrayOfWords[wordsCounter] = sentence;
            wordsCounter++;
        }
        String[] totalArrayOfWords = new String[wordsCounter];
        for (int i = 0; i < wordsCounter; i++) {
            totalArrayOfWords[i] = arrayOfWords[i];
        }
        return totalArrayOfWords;
    }

    public static int findAnswer(String[] array){
        int counter = 0;
        for(int i = 0; i < array.length; i++){
            if (array[i].equalsIgnoreCase(array[array.length - 1])){
                counter++;
            }
        }
        return counter;
    }

    public static void outputToFile(final String path, final  String sentence, final int answer){
        try(FileWriter fw = new FileWriter(path)) {
            fw.write("Sentence is:\n" + sentence + "\nLast word founded " + answer + " times.");
            System.out.println("Done");
        } catch (Exception e) {
            System.out.println("File error!");
        }
    }

    public static void output(final byte source,final String sentence, final int answer){
        String outPath;
        if (source == 1) {
            System.out.println("Sentence is:\n" + sentence + "\nLast word founded " + answer + " times.");
        } else{
            outPath = takeOutPath();
            outputToFile(outPath, sentence ,answer);
        }
    }
}