EU7i6H0g

1String[] data; // the data you want to save
2int byteLength = 0;
3byte[][] bytes = new byte[data.length][];
4
5// Calculate the length of the content.
6for(int i=0; i<data.length; i++) {
7    bytes[i] = data[i].getBytes();
8    byteLength += bytes[i].length;
9    byteLength += 4; // this is for an integer, which is for the length of the String
10}
11
12// Transfer the content to a ByteBuffer object
13ByteBuffer buffer = ByteBuffer.allocate(byteLength);
14for(int i=0; i<bytes.length; i++) {
15    // Put the length of the current byte array
16    buffer.putInt(bytes[i].length);
17    for(int j=0; j<bytes[i].length; j++) {
18        // Reverse the byte so that it can't be understood
19        buffer.put((byte)(~bytes[i][j])); 
20    }
21}
22	
23FileOutputStream fos = new FileOutputStream("YourFileName.anyExtension");
24fos.write(buffer.array());
25fos.close();
26	
27FileInputStream fis = new FileInputStream("YourFileName.anyExtension");
28DataInputStream dis = new DataInputStream(fis);
29ArrayList<String> list = new ArrayList<String>();
30byte[] bytes;
31while(dis.available()) {
32    int length = dis.readInt();
33    bytes = new byte[length];
34    for(int i=0; i<length; i++) {
35        // Those bytes were reversed, right?
36        bytes[i] = (byte)(~dis.readByte());
37    }
38    // Convert byte array to String
39    String str = new String(bytes);
40    list.add(str);
41}
42	
43byte password[] = (WHAT YOUR WANT. STRING, NUMBER, etc.).getBytes();
44    DESKeySpec desKeySpec;
45    try {
46
47        desKeySpec = new DESKeySpec(password);
48        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
49        SecretKey key = keyFactory.generateSecret(desKeySpec);
50
51        Cipher desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
52        desCipher.init(Cipher.ENCRYPT_MODE, key);
53
54        // Create stream
55        FileOutputStream fos = new FileOutputStream("Your file here");
56        BufferedOutputStream bos = new BufferedOutputStream(fos);
57        CipherOutputStream cos = new CipherOutputStream(bos, desCipher);
58    }
59	
60SecretKey key = loadKey(); // Deserialize your SecretKey object
61try {
62            Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");
63            cipher.init(Cipher.DECRYPT_MODE, key);
64            FileInputStream fis = new FileInputStream("Your file here");
65            BufferedInputStream bis = new BufferedInputStream(fis);
66            CipherInputStream cis = new CipherInputStream(bis, cipher);