Having a C# encryption decryption methods , wanted there copy in JAVA -

private static string encrypt(string plaintext) {     byte[] keybytes = encoding.utf8.getbytes(_secretkey);     byte[] hashedkeybytes = new sha256cryptoserviceprovider().computehash(keybytes);     var secretkeyhashstring = string.concat(hashedkeybytes.select(hb => hb.tostring("x2")));     byte[] cryptokeyhash = new sha256cryptoserviceprovider().computehash(encoding.utf8.getbytes(secretkeyhashstring));     byte[] cryptokey = cryptokeyhash.take(16).toarray();      var aes = new aescryptoserviceprovider()     {         padding = paddingmode.pkcs7,         key = cryptokey,         mode = ciphermode.cbc,         iv = _initialisationvector     };      rijndaelmanaged aesenc = new rijndaelmanaged();     byte[] plaintextbytes = encoding.utf8.getbytes(plaintext);      var encryptor = aes.createencryptor();     byte[] encryptedbytes = encryptor.transformfinalblock(plaintextbytes, 0, plaintextbytes.length);     var encryptedstring = convert.tobase64string(encryptedbytes);      return encryptedstring; }  private static string decrypt(string encryptedtext) {     byte[] keybytes = encoding.utf8.getbytes(_secretkey);     byte[] hashedkeybytes = new sha256cryptoserviceprovider().computehash(keybytes);     var secretkeyhashstring = string.concat(hashedkeybytes.select(hb => hb.tostring("x2")));     byte[] cryptokeyhash = new sha256cryptoserviceprovider().computehash(encoding.utf8.getbytes(secretkeyhashstring));     byte[] cryptokey = cryptokeyhash.take(16).toarray();      byte[] initialisationvector = { 0, 133, 36, 86, 84, 150, 188, 164, 28, 210, 112, 158, 141, 87, 11, 227 };     var aes = new aescryptoserviceprovider()     {         padding = paddingmode.pkcs7,         key = cryptokey,         mode = ciphermode.cbc,         iv = _initialisationvector     };     var decryptor = aes.createdecryptor();      var encryptedbytes = convert.frombase64string(encryptedtext);     var decryptedbytes = decryptor.transformfinalblock(encryptedbytes, 0, encryptedbytes.length);     var decryptedstring = encoding.utf8.getstring(decryptedbytes);      return decryptedstring; } 

java provides own encryption/decryption interface http://www.codejava.net/coding/file-encryption-and-decryption-simple-example