package com.company;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class Main {
    public static String[] readFromFile() throws IOException {
        Scanner in = new Scanner(System.in);
        String inputFileName;
        System.out.println("Enter a file name: ");
        inputFileName = in.nextLine();
        inputFileName = inputFileName + ".txt";
        FileInputStream inFile = new FileInputStream(inputFileName);
        byte[] line = new byte[inFile.available()];
        inFile.read(line);
        String text = new String(line);
        String[] words = text.split(" ");
        return words;
    }

    public static void largestWord_s(String[] words) {
        String[] mas_words = words.split(" ");
        String max = mas_words[0];
        for (int i = 1; i < mas_words.length; ++i) {
            if (max.length() < mas_words[i].length()) {
                max = mas_words[i];
            }
        }
        System.out.println("The longest word is :" + max);
    }

    public static void writeToFile(String largestWord) throws IOException {
        Scanner in = new Scanner(System.in);
        int i;
        String newFileName;
        System.out.println("Enter file name for save:");
        newFileName = in.nextLine();
        newFileName = newFileName + ".txt";
        FileWriter fileWriter = new FileWriter(new File(newFileName));
        fileWriter.write("The longest word is:" + largestWord);
        fileWriter.flush();
    }

    public static void main(String[] args) throws IOException {
        String[] words = new String[0];
        words = readFromFile();
        System.out.println(words);
        String longWord = largestWord_s(words);
        writeToFile(longWord);
    }
}