How to Extract PGP public key and PGP Private key from JKS File and to Decrypt a pgp Encrypted Message?

I have the following code for decrypting a PGP encrypted Private Key Message.

    KeyStore ks = KeyStore.getInstance("JKS");
    File file = new file("abc.txt");
    ks.load(new FileInputStream("abc.jks"), "******".toCharArray());
    KeyStore.PrivateKeyEntry keyEntry =(KeyStore.PrivateKeyEntry) ks.getEntry("abcd", new KeyStore.PasswordProtection("******".toCharArray()));
    PrivateKey k = keyEntry.getPrivateKey();
    CertificateFactory fact = CertificateFactory.getInstance("X.509");
    FileInputStream is = new FileInputStream ("ght.cer");
    X509Certificate cer = (X509Certificate) fact.generateCertificate(is);
    PublicKey NPCIPubKey = cer.getPublicKey();

    byte[] bt = new byte[(int)file.length()];
    FileInputStream fis = new FileInputStream(file);
    fis.read(bt);
    PGPPublicKey pk1 = new JcaPGPKeyConverter().getPGPPublicKey(PGPPublicKey.RSA_GENERAL, NPCIPubKey, new Date());
    PGPPrivateKey prik = new JcaPGPKeyConverter().getPGPPrivateKey(pk1, k);
    DecClass dec = new DecClass();
    dec.rsaDecryptFile(fis,prik);'

Decryption Class :

public class DecClass {

	public void rsaDecryptFile(InputStream in,  PGPPrivateKey priK)  {
		try {
			Security.addProvider(new BouncyCastleProvider());
			
			in = org.bouncycastle.openpgp.PGPUtil.getDecoderStream(in);
			PGPObjectFactory pgpF = new PGPObjectFactory(in);
			PGPEncryptedDataList enc;
			Object o = pgpF.nextObject();
			//
			// the first object might be a PGP marker packet.
			//
			if (o instanceof PGPEncryptedDataList) {
				enc = (PGPEncryptedDataList) o;
			} else {
				enc = (PGPEncryptedDataList) pgpF.nextObject();
			}                        

                        Iterator<PGPPublicKeyEncryptedData> it = enc.getEncryptedDataObjects();
			PGPPrivateKey sKey = null;
			PGPPublicKeyEncryptedData pbe = null;

			while (sKey == null && it.hasNext()) {
				pbe = it.next();
				sKey = priK;
			}

			if (sKey == null) {
				throw new IllegalArgumentException("Secret key for message not found.");
			}
			
			PublicKeyDataDecryptorFactory b = new JcePublicKeyDataDecryptorFactoryBuilder().setProvider("BC")
					.setContentProvider("BC").build(sKey);

			InputStream clear = pbe.getDataStream(b);
			PGPObjectFactory plainFact = new PGPObjectFactory(clear,new BcKeyFingerprintCalculator());

			Object message = plainFact.nextObject();
			System.out.println("Secret key info 3:: " + pbe.getKeyID() + new Date());
			if (message instanceof PGPCompressedData) {
				PGPCompressedData cData = (PGPCompressedData) message;
				PGPObjectFactory pgpFact = new PGPObjectFactory(cData.getDataStream(),new BcKeyFingerprintCalculator());
				message = pgpFact.nextObject();
			}			
			if (message instanceof PGPLiteralData) {
				PGPLiteralData ld = (PGPLiteralData) message;
				InputStream unc = ld.getInputStream();
				int ch;				
				FileUtils.copyInputStreamToFile(unc, new File("D:\\Development_Docs\\PGP\\Bulk\\target.txt"));
				
			} else if (message instanceof PGPOnePassSignatureList) {
				throw new PGPException("Encrypted message contains a signed message - not literal data.");
			} else {
				throw new PGPException("Message is not a simple encrypted file - type unknown.");
			}if (pbe.isIntegrityProtected()) {
				if (!pbe.verify()) {
					throw new PGPException("Message failed integrity check");
				}
			}			
		}catch (PGPException e) {
			e.printStackTrace();
		}catch (Exception e) {
			e.printStackTrace();
		}	
	}
}

But am getting null pointer exception in Iterator<PGPPublicKeyEncryptedData> it = enc.getEncryptedDataObjects(); line in DecClass rsaDecryptFile Method.While debugging value of PGPEncryptedDataList enc is coming null. Am not able to trace the source of the exception. Please advise on how can i resolve this exception and get the code to work. Please find below snippet of my input encrypted message

-----BEGIN PGP MESSAGE-----
Version: BCPG v1.47

hQEMAxVcH36ac1ahAQf/UMvfmBxIEtGOcIzovhcQ8WTojB06oF8/8i5lv6iz3EEj
vIceEWSHdeCJuYSemPaiIrccOOfGFqZodg6a7IQhjG0WcuSg5F4a/Pn/7KxKqB9n
OoHwmpX0+Pbm1Y2mNAj3LN9KtK3
-----END PGP MESSAGE-----

I'm able to decrypt the file by modifing the following code.Hope it'll work for you.

        @SuppressWarnings({ "unchecked", "unused" })
        public static void rsaDecryptFile(InputStream in, OutputStream out, 
        PGPPrivateKey priK)  {
	try {
		Security.addProvider(new BouncyCastleProvider());
		
		in = org.bouncycastle.openpgp.PGPUtil.getDecoderStream(in);
		PGPObjectFactory pgpF = new PGPObjectFactory(in,new 
        JcaKeyFingerprintCalculator());
		PGPEncryptedDataList enc;
		Object o = pgpF.nextObject();
		//
		// the first object might be a PGP marker packet.
		//
		if (o instanceof PGPEncryptedDataList) {
			enc = (PGPEncryptedDataList) o;
		} else {
			enc = (PGPEncryptedDataList) pgpF.nextObject();
		}

		//
		// find the secret key
		//
		//Iterator<PGPPublicKeyEncryptedData> it = enc.getEncryptedDataObjects();
		PGPPrivateKey sKey = null;
		PGPPublicKeyEncryptedData pbe = null;

		while (sKey == null /*&& it.hasNext()*/) {
			//pbe = it.next();
			pbe = (PGPPublicKeyEncryptedData)enc.getEncryptedDataObjects().next();
			//sKey = findSecretKey(pubK, pbe.getKeyID(), priK);
			sKey = priK;
			

		}

		if (sKey == null) throw new IllegalArgumentException("Secret key for message not found.");
		
		PublicKeyDataDecryptorFactory b = new JcePublicKeyDataDecryptorFactoryBuilder().setProvider("BC")
				.setContentProvider("BC").build(sKey);

		InputStream clear = pbe.getDataStream(b);
		PGPObjectFactory plainFact = new PGPObjectFactory(clear,new JcaKeyFingerprintCalculator());

		Object message = plainFact.nextObject();
		System.out.println("Secret key info 3:: " + pbe.getKeyID() + new Date());
		if (message instanceof PGPCompressedData) {
			PGPCompressedData cData = (PGPCompressedData) message;
			PGPObjectFactory pgpFact = new PGPObjectFactory(cData.getDataStream(),new JcaKeyFingerprintCalculator());

			message = pgpFact.nextObject();
		}
		
		if (message instanceof PGPLiteralData) {
			PGPLiteralData ld = (PGPLiteralData) message;
			InputStream unc = ld.getInputStream();
			System.out.println("Unc d " + unc.read());
			int ch;
			
			while ((ch = unc.read()) >= 0) { 
				out.write(ch); 
				}
			 
			 

			//FileUtils.copyInputStreamToFile(unc, new File("D:\\Development_Docs\\PGP\\Bulk\\target.txt"));

			
		} else if (message instanceof PGPOnePassSignatureList) {
			throw new PGPException("Encrypted message contains a signed message - not literal data.");
		} else {
			throw new PGPException("Message is not a simple encrypted file - type unknown.");
		}
		

		if (pbe.isIntegrityProtected()) {
			if (!pbe.verify()) {
				throw new PGPException("Message failed integrity check");
			}
		}
		
		
	}catch (PGPException e) {
		// TODO: handle exception
		e.printStackTrace();
	}catch (Exception e) {
		// TODO: handle exception
		e.printStackTrace();
	}
	
	
}