In my java program I would like to read a .txt file in and encode it afterwards. I know how to read a File in and tried to learn how to encode an array. The problem I have is that I don't know how to combine it, it doesn't work the way I tried it.

Here's the part I can read in my text file with:

public class ReadFile { public static void main(String[] args) throws IOException { FileReader fr = new FileReader("test.txt"); BufferedReader br = new BufferedReader(fr); String zeile = ""; do { zeile = br.readLine(); System.out.println(zeile); } while (zeile != null); br.close(); } } 

In this part I can encrypt and decrypt bytes:

public class Crypt { public static void main(String[] args) { try{ KeyGenerator keygenerator = KeyGenerator.getInstance("DES"); SecretKey myDesKey = keygenerator.generateKey(); Cipher desalgCipher; desalgCipher = Cipher.getInstance("DES"); byte[] text = "test".getBytes("UTF8"); desalgCipher.init(Cipher.ENCRYPT_MODE, myDesKey); byte[] textEncrypted = desalgCipher.doFinal(text); String s = new String(textEncrypted); System.out.println(s); desalgCipher.init(Cipher.DECRYPT_MODE, myDesKey); byte[] textDecrypted = desalgCipher.doFinal(textEncrypted); s = new String(textDecrypted); System.out.println(s); } catch(Exception e) { System.out.println("Error"); } } } 

I thought to read the text file in and put it in a string to encode it, but I think it is way too complex. Is there another way to connect them, or is another way for encoding required?