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New ECPoint(BigInteger x, BigInteger y)

import java.math.BigInteger; import java.security.KeyPair; import java.security.KeyPairGenerator; import java.security.MessageDigest; import java.security.SecureRandom; import java.security.Security; import java.security.spec.ECFieldFp; import java.security.spec.ECParameterSpec; import java.security.spec.ECPoint; import java.security.spec.EllipticCurve; import javax.crypto.KeyAgreement; public class MainClass {   public static void main(String[] args) throws Exception {    // Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());     KeyPairGenerator keyGen = KeyPairGenerator.getInstance("ECDH", "BC");     EllipticCurve curve = new EllipticCurve(new ECFieldFp(new BigInteger(         "fffffffffffffffffffffffffffffffeffffffffffffffff", 16)), new BigInteger(         "fffffffffffffffffffffffffffffffefffffffffffffffc", 16), new BigInteger(         "fffffffffffffffffffffffffffffffefffffffffffffffc", 16));     ECParameterSpec ecSpec = new ECParameterSpec(curve, new ECPoint(new BigInteger(         "fffffffffffffffffffffffffffffffefffffffffffffffc", 16), new BigInteger(         "fffffffffffffffffffffffffffffffefffffffffffffffc", 16)), new BigInteger(         "fffffffffffffffffffffffffffffffefffffffffffffffc", 16), 1);     keyGen.initialize(ecSpec, new SecureRandom());     KeyAgreement aKeyAgree = KeyAgreement.getInstance("ECDH", "BC");     KeyPair aPair = keyGen.generateKeyPair();     KeyAgreement bKeyAgree = KeyAgreement.getInstance("ECDH", "BC");     KeyPair bPair = keyGen.generateKeyPair();     aKeyAgree.init(aPair.getPrivate());     bKeyAgree.init(bPair.getPrivate());     aKeyAgree.doPhase(bPair.getPublic(), true);     bKeyAgree.doPhase(aPair.getPublic(), true);     MessageDigest hash = MessageDigest.getInstance("SHA1", "BC");     System.out.println(new String(hash.digest(aKeyAgree.generateSecret())));     System.out.println(new String(hash.digest(bKeyAgree.generateSecret())));   } }