lab2.3(java)

package com.company;
import java.io.*;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Scanner;
public class Main {
    static Scanner scan = new Scanner(System.in);
    public static void main(String[] args){
        System.out.println("Welcome to the program that checks is a given number a palindrome.");
        String inputSource = getSource("entering the number");
        int number = getNumber(inputSource);
        int reverse = getReverse(number);
        String answer = getAnswer(number,reverse);
        String outputSource = getSource("output");
        scan.close();
        output(outputSource,answer);
    }
    static String getSource(String what){
        System.out.print("Select the source for " + what + ":\n1:Console\n2:File\nEnter 1 or 2: ");
        String choice = scan.nextLine();
        while ((!choice.equals("1")) && (!choice.equals("2"))){
            System.out.print("Incorrect input!!! Select the source for " + what + ":\n1:Console\n2:File\nEnter 1 or 2: ");
            choice = scan.nextLine();
        }
        return choice;
    }
    static String getInPath(){
        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;
    }
    static String getOutPath(){
        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;
    }
    static void outputToFile(String path, String answer){
        try{
            FileWriter writer = new FileWriter(path);
            writer.write(answer);
            writer.flush();
            System.out.println("Complete!!!");
        }
        catch(IOException ex){
            System.out.println("Incorrect file content!!!");
        }
    }
    static int getNumberFromConsole() {
        boolean isCorrect;
        int number = 0;
        System.out.print("Enter number: ");
        do {
            isCorrect = false;
            try {
                number = Integer.parseInt(scan.nextLine());
            } catch (Exception e) {
                System.out.print("Incorrect input!!!\nEnter number: ");
                isCorrect = true;
            }
            if (!isCorrect && (number < 1)) {
                System.out.println("The number must be more than 0\nEnter number: ");
                isCorrect = true;
            }
        } while (isCorrect);
        return number;
    }
    static int getNumberFromFile(String path){
        int number = 0;
        String line;
        int lineCounter = 0;
        try {
            BufferedReader reader = new BufferedReader(new FileReader(path));
            while ((line = reader.readLine()) != null) {
                lineCounter++;
                    if (lineCounter == 1) {
                        try {
                            number = Integer.parseInt(line);
                        } catch (Exception e) {
                            System.out.println("Incorrect file content!!!");
                        }
                    }
                }
                reader.close();
        }catch (IOException e) {
            System.out.println("Input/Output error!!!");
            number = 0;
        }
        if ((number > 0) && (lineCounter > 1)){
            System.out.println("Incorrect file content!!!");
            number = 0;
        }
        return number;
    }
    static int getNumber(String source){
        int number;
        String InPath;
        if (source.equals("1")) {
            number = getNumberFromConsole();
        } else {
            InPath = getInPath();
            number = getNumberFromFile(InPath);
            while (number == 0) {
                InPath = getInPath();
                number = getNumberFromFile(InPath);
            }
        }
        return number;
    }
    static int getReverse (int number) {
        int result = 0;
        while (number > 0){
            result = result * 10 + number % 10;
            number /= 10;
        }
        return result;
    }
    static String getAnswer  (int number, int reverse) {
        if (number == reverse)
            return "Number is palindrome";
        else
            return "Number isn't palindrome";
    }
    static void output(String source, String answer){
        String outPath;
        if (source.equals("1")) {
            System.out.println(answer);
        } else{
            outPath = getOutPath();
            outputToFile(outPath, answer);
        }
    }
}