1 задание защита информации

package zaschita1;

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 kodirovanie() throws Exception{
        System.out.println("Kodirovanie: \n");
        List<String> lines = Files.readAllLines(Paths.get("src//zaschita1//input1.txt"), StandardCharsets.UTF_8);
        StringBuilder sb = new StringBuilder();

        for(String line: lines){
            sb.insert(sb.length(), line);//line.replaceAll(" ", "")
        }

        String[] binAscii = new String[sb.length()];
        for (int i = 0; i < binAscii.length; i++ ){
            binAscii[i] = Integer.toBinaryString((int) sb.toString().charAt(i));
            System.out.println(sb.toString().charAt(i) + " " + (int) sb.toString().charAt(i) + " " + binAscii[i]);
        }

        FileWriter writer = new FileWriter("src//zaschita1//output1.txt", false);
        for (int i = 0; i < binAscii.length; i ++){
            for (int j = 0; j < binAscii[i].length(); j ++){
                writer.append(binAscii[i].charAt(j) == '1' ? ' ' : '\0');
            }
            writer.append('\n');
        }
        writer.flush();
    }

    public static void dekodirovanie() throws Exception{
        System.out.println("\nDecodirovanie: ");
        List<String> lines = Files.readAllLines(Paths.get("src//zaschita1//output1.txt"), StandardCharsets.UTF_8);
        StringBuilder sb = new StringBuilder();

        String[] s;
        s = new String[lines.size()];
        System.out.println();
        //System.out.println("lines.size: " + lines.size());

        int k = 0;
        for(String line: lines){
            for(int i = 0; i < line.length(); i ++){
                if(line.charAt(i) == ' '){
                    sb.insert(sb.length(), '1');
                }
                else {
                    sb.insert(sb.length(), '0');
                }
            }
            s[k] = sb.toString();
            System.out.println("s[" + k  + "]: " + s[k] + "\n");
            k++;
            sb.delete(0, sb.length()-1);
        }

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

        FileWriter writer = new FileWriter("src//zaschita1//output2.txt", false);
        writer.append(res.toString());

        writer.flush();
    }
    public static void main(String[] args) throws Exception{
        kodirovanie();
        dekodirovanie();
    }

}