Replicate or Call java encryption function in Oracle pl/sql

I am trying to replicate encryption/decryption method present in java in Oracle DB, so that data encrypted in java can be decrypted through Oracle Function.

Below is java code:

package com.encr;
import java.security.NoSuchAlgorithmException;
import javax.crypto.Cipher;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class EncrUtil 
{
private static Cipher cipher = null;

public static void aesInit(String inKey) throws Exception 
{
    String methodName = "aesInit";
    try
    {

        byte[] inkeyBytes = inKey.getBytes("utf-8");
        System.out.println("inkeyBytes="+inkeyBytes.toString());
        final SecretKeySpec clientkey = new SecretKeySpec(inkeyBytes, "AES");
        cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        final IvParameterSpec iv = new IvParameterSpec(new byte[32]);
        cipher.init(Cipher.ENCRYPT_MODE,clientkey,iv);
    }
    catch (NoSuchAlgorithmException e) {
        throw new Exception("NoSuchAlgorithmException", e);
    } catch (NoSuchPaddingException e) {

        throw new Exception("NoSuchPaddingException", e);

    }
}

public static String encrypt(String inData,String inKey)
{
    String methodName = "encrypt";
    String strCipherText = null;
    try
    {
        if ( null != inData && null != inKey)
        {
            if(EncrUtil.cipher == null){
                EncrUtil.aesInit(inKey);
            }
            byte[] byteDataToEncrypt = inData.getBytes("utf-8");
            System.out.println(byteDataToEncrypt.toString());
            byte[] byteCipherText = cipher.doFinal(byteDataToEncrypt); 
            System.out.println(byteCipherText.toString());
            strCipherText = new BASE64Encoder().encode(byteCipherText);
        }

    }
    catch (Exception e) {
        String sErrMsg = "Text to be encrypted: " + inData;
        sErrMsg = new StringBuffer(methodName).append( sErrMsg) .append( "  Message: ") .append(e.getMessage()).toString();
        strCipherText = sErrMsg;

    }
    return strCipherText;

}

public static String decrypt(String inData,String inKey)
{
    String methodName = "decrypt";
    String strDecryptedText = null;
    try
    {

        byte[] inkeyBytes = inKey.getBytes("utf-8");
        final SecretKeySpec clientkey = new SecretKeySpec(inkeyBytes, "AES");
        cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        final IvParameterSpec iv = new IvParameterSpec(new byte[16]);
        cipher.init(Cipher.DECRYPT_MODE,clientkey,iv);
        byte[] decodedData = new BASE64Decoder().decodeBuffer(inData);
        byte[] byteDecryptedText = cipher.doFinal(decodedData);
        strDecryptedText = new String(byteDecryptedText);

    }
    catch (Exception e) {
        String sErrMsg = "Text to be decrypted: " + inData;
        sErrMsg = new StringBuffer(methodName).append(sErrMsg) .append( "Message:") .append(e.getMessage()).toString();
        strDecryptedText = sErrMsg;
    } 

    return strDecryptedText;

}

public static void main(String[] args) 
{
    String inKey= "84hf763bht096hnf";
    String inData= "Vikram";
    System.out.println("Word to be encrypted is "+inData);
    String encrypted = EncrUtil.encrypt(inData,inKey);
    System.out.println("Encrpted word is"+encrypted);

}
}

The Oracle Pl/sql function i tried for replicating is

CREATE OR REPLACE PACKAGE BODY SYS.enc_dec
AS
encryption_type    PLS_INTEGER := DBMS_CRYPTO.ENCRYPT_AES
                                 + DBMS_CRYPTO.CHAIN_CBC
                                 + DBMS_CRYPTO.PAD_PKCS5;
encryption_key     RAW (32) := UTL_I18N.STRING_TO_RAW ('84hf763bht096hnf', 'AL32UTF8');
 FUNCTION encrypt (p_plainText VARCHAR2) RETURN RAW DETERMINISTIC
 IS
    encrypted_raw      RAW (2000);
 BEGIN
 DBMS_OUTPUT.PUT_LINE(UTL_RAW.CAST_TO_VARCHAR2(encryption_key));
    encrypted_raw := DBMS_CRYPTO.ENCRYPT
    (
       --src => UTL_RAW.CAST_TO_RAW (p_plainText),
       src =>UTL_I18N.STRING_TO_RAW (p_plainText,'AL32UTF8'),
       typ => encryption_type,
       key => encryption_key
    );
   RETURN encrypted_raw;
 EXCEPTION
  WHEN OTHERS THEN
  DBMS_OUTPUT.PUT_LINE(SUBSTR(SQLERRM, 1, 100));
 END encrypt;
 FUNCTION decrypt (p_encryptedText RAW) RETURN VARCHAR2 DETERMINISTIC
 IS
    decrypted_raw      RAW (2000);
 BEGIN
    decrypted_raw := DBMS_CRYPTO.DECRYPT
    (
        src => p_encryptedText,
        typ => encryption_type,
        key => encryption_key
    );
    RETURN (UTL_I18N.RAW_TO_CHAR(decrypted_raw,'AL16UTF8'));
 EXCEPTION
  WHEN OTHERS THEN
  DBMS_OUTPUT.PUT_LINE(SUBSTR(SQLERRM, 1, 100));
 END decrypt;
END;

Encryption done by above code is not same as that done in java
Please let me know where i am going wrong in oracle function or
Please tell me how to add the java methos in oracle, in tutorials i couldn't find how to include imports of java in oracle.