Testing passwrod hashing PBKDF2 with HmacSHA512, Java

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//import org.apache.commons.codec.binary.Hex;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.PBEKeySpec;
import java.io.UnsupportedEncodingException;
import java.security.Nosuchalgorithm;
import java.security.spec.InvalidKeySpecException;

/**
 * This is the Main class.
 */
class Rextester {

public static void main(String[] args) throws UnsupportedEncodingException {

String password = "password";
        String salt = "1234";
        int iterations = 100000;
        int keyLength = 1024;
        char[] passwordchars = password.toCharArray();
        byte[] saltBytes = salt.getBytes();

byte[] hashedBytes = hashPassword(passwordChars, saltBytes, iterations, keyLength);
        //String hashedString = Hex.encodeHexString(hashedBytes);

System.out.println(hashedBytes.length);
    }

public static byte[] hashPassword( final char[] password, final byte[] salt, final int iterations, final int keyLength ) {

try {
            Secretkeyfactory skf = SecretKeyFactory.getInstance( "PBKDF2WithHmacSHA512" );
            PBEKeySpec spec = new PBEKeySpec( password, salt, iterations, keyLength );
            SecretKey key = skf.generateSecret( spec );
            byte[] res = key.getEncoded( );
            return res;
        } catch ( NoSuchAlgorithmException | InvalidkeyspecException e ) {
            thrownew RuntimeException ( "e" );
        }
    }
}

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Compilation time: 0.52 sec, absolute service time: 0,72 sec