Generate EC Keypair in Java

ECKeyPairGenerator.java

package com.kabronkline.pkeydb;

import java.security.*;
import java.security.spec.ECGenParameterSpec;
import java.util.Base64;

public class ECKeyPairGenerator {

    public static void main(String[] args) throws InvalidAlgorithmParameterException, NoSuchProviderException, NoSuchAlgorithmException {
        KeyPairGenerator keyPairGen = KeyPairGenerator.getInstance("EC","SunEC");
        // 256 bit key with Koblitz curve
        ECGenParameterSpec keyGenParamSpec = new ECGenParameterSpec("secp256k1");
        keyPairGen.initialize(keyGenParamSpec);

        KeyPair keyPair = keyPairGen.genKeyPair();
        PrivateKey privateKey = keyPair.getPrivate();
        PublicKey publicKey = keyPair.getPublic();

        System.out.println("Private Key: " + Base64.getEncoder().encodeToString(privateKey.getEncoded()));
        System.out.println("Public Key: " + publicKey.toString());
    }
}