Methods to create a KeyPair dynamically and to convert to string and back to private/public keys

GenerateKeyPair.java

protected static void generateKeyPair() throws NoSuchAlgorithmException {
	KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA");
	keyGen.initialize(512);
	KeyPair genKeyPair = keyGen.genKeyPair();

	String publicKey = Base64.encodeBase64String(genKeyPair.getPublic().getEncoded());
	String privateKey = Base64.encodeBase64String(genKeyPair.getPrivate().getEncoded());

	System.out.println(publicKey);
	System.out.println(privateKey);
}

StringToPrivateKey.java

private static PrivateKey createPrivateKey(String string) throws InvalidKeySpecException, NoSuchAlgorithmException {
	return KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(Base64.decodeBase64(string)));
}

StringToPublicKey.java

private static PublicKey createPublicKey(String string) throws InvalidKeySpecException, NoSuchAlgorithmException {
	return KeyFactory.getInstance("RSA").generatePublic(new X509EncodedKeySpec(Base64.decodeBase64(string)));
}