2 задание стенография переделала в последний раз

package zaschita1;
import java.io.File;
import java.util.Scanner;
import java.io.FileWriter;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.List;

public class Zaschita1 {

public static void encoding() throws Exception{ // ok
        System.out.print("Encoding: \n");

        Scanner sc = new Scanner(new File("src//zaschita1//input_word.txt"));
        String word = sc.nextLine();
        System.out.println("Phrase: " + word);

        String[] binAscii = new String[word.length()];
        for (int i = 0; i < binAscii.length; i++ ){
            binAscii[i] = String.format("%16s", Integer.toBinaryString((int) word.charAt(i))).replace(' ', '0');
            System.out.println(word.charAt(i) + " " + (int) word.charAt(i) + " " + binAscii[i]);
        }

        StringBuilder binAsciiConcat = new StringBuilder();//add
        int binAcounter = 0;// add суммарно сколько в слове бит
        for(int i = 0; i < binAscii.length; i ++){//add
            binAsciiConcat.append(binAscii[i]);//add
        }

        List<String> lines = Files.readAllLines(Paths.get("src//zaschita1//input_text.txt"), StandardCharsets.UTF_8);
        FileWriter writer = new FileWriter("src//zaschita1//output.txt", false);

        System.out.println("lines size: " + lines.size() + " binAsciiConcat: " + binAsciiConcat.toString());

        int positionSpace;
        StringBuilder substringText = new StringBuilder();
        for(int i = 0; i < lines.size(); i ++){//lines.size(); i ++){
            substringText.append(lines.get(i));
            System.out.println('\n' + "lines: "  + i + ": " + substringText.toString());
            while(substringText.indexOf(" ") != -1 && (binAcounter != binAsciiConcat.toString().length())){
                positionSpace = substringText.indexOf(" ");
                System.out.println("index пробела: " + positionSpace);
                writer.append(substringText.substring(0, positionSpace + 1));
                if(binAsciiConcat.toString().charAt(binAcounter) == '1'){
                    writer.append(" ");
                }
                binAcounter++;
                substringText.delete(0, positionSpace + 1);
                System.out.println("обрезали:" + substringText.toString());
            }
            if(binAcounter == binAsciiConcat.toString().length()){
                writer.append('\u200B');
            }
            writer.append(substringText.toString() + '\n'); //добавляем хвостик
            substringText.delete(0, substringText.toString().length()); //удаляем хвостик
        }

        writer.flush();

}
    public static void decoding() throws Exception{
        System.out.println("\nDecoding: ");
        List<String> lines = Files.readAllLines(Paths.get("src//zaschita1//output.txt"), StandardCharsets.UTF_8);
        StringBuilder sb = new StringBuilder();

        for(String line: lines){
            sb.append(line);
        }

        int indexU200B = sb.toString().indexOf('\u200B');
        int sbLength = sb.toString().length();
        sb.delete(indexU200B, sbLength);

        System.out.println("sb: " + sb.toString());

        FileWriter writerOutput = new FileWriter("src//zaschita1//output_word.txt", false);
        writerOutput.write(sb.toString());
        writerOutput.flush();

        /*
        sb.delete(sb.toString().indexOf('\u200B'), sb.toString().length());

        int start = 0, end = 16;
        int[] asciiCode = new int[sb.toString().length() / 16];

        StringBuilder res = new StringBuilder();
        for (int i = 0; i < asciiCode.length; i++ ){
            asciiCode[i] = (char)Integer.parseInt(sb.toString().substring(start, end), 2);
            start += 16;
            end += 16;
            System.out.println("ascii: " + asciiCode[i]);
            res.insert(res.length(), (char)asciiCode[i]);
            //System.out.println("char: " + res.toString());
        }

        FileWriter writerOutput = new FileWriter("src//zaschita1//output_word.txt", false);
        writerOutput.write(res.toString());
        writerOutput.flush();
                */
    }

    public static void main(String[] args) throws Exception{
       encoding();
       decoding();
    }

}