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();
}
}