How to decrypt RSA version of Apple Pay PaymentToken in java

is there any avaiable demo for java?

Acutally, i use code below to decrypt wrappedKey :

       Cipher oaepFromInit = Cipher.getInstance("RSA/ECB/OAEPWithSHA-256AndMGF1Padding", new org.bouncycastle.jce.provider.BouncyCastleProvider());
        OAEPParameterSpec oaepParams = new OAEPParameterSpec("SHA-256", "MGF1", new MGF1ParameterSpec("SHA-1"), PSource.PSpecified.DEFAULT);
        PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(privKey);
        KeyFactory keyFactory = KeyFactory.getInstance("RSA");
        Key privateKey = keyFactory.generatePrivate(pkcs8KeySpec);
        oaepFromInit.init(Cipher.DECRYPT_MODE, privateKey, oaepParams);
        return oaepFromInit.doFinal(wrappedKeyBytes);

But this code can't decrypt wrappedKey, always occur error:

Exception in thread "main" org.bouncycastle.jcajce.provider.util.BadBlockException: unable to decrypt block
	at org.bouncycastle.jcajce.provider.asymmetric.rsa.CipherSpi.getOutput(Unknown Source)
	at org.bouncycastle.jcajce.provider.asymmetric.rsa.CipherSpi.engineDoFinal(Unknown Source)
	at javax.crypto.Cipher.doFinal(Cipher.java:2168)
	at Caused by: org.bouncycastle.crypto.InvalidCipherTextException: data wrong
	at org.bouncycastle.crypto.encodings.OAEPEncoding.decodeBlock(Unknown Source)
	at org.bouncycastle.crypto.encodings.OAEPEncoding.processBlock(Unknown Source)
	... 5 more

publicKeyHash value match my publicKey and privateKey, and I can use my publicKey and privatekey to encrypt and decrypt my own text in same algorithm.