在Play Framework中混合使用scala和java

package AuthorizeNetFingerprint;


class Fingerprint {
    private static Log logger = LogFactory.getLog(Fingerprint.class);

    private long sequence;
    private long timeStamp;
    private String fingerprintHash;

    private Fingerprint() {
    }

    /**
     * Creates a fingerprint with raw data fields.
     * 
     * @param loginID
     * @param transactionKey
     * @param sequence : this number will be concatenated with a random value
     * @param amount
     * @return A Fingerprint object.
     */
    public static String createFingerprint(String loginID,String transactionKey,long sequence,String amount) {
         return transactionKey;
    }
}

我试图像这个scala一样访问它：

val fingerprint = new AuthorizeNetFingerprint.Fingerprint
val x_fp_hash = fingerprint.createFingerprint(x_api_login_id,transaction_key,x_fp_sequence,x_amount)

它给了我这个错误：

对象AuthorizeNetFingerprint包中的指纹无法在AuthorizeNetFingerprint包中访问

是否可以在Play Framework中混合使用scala和java？

我做错了什么？

编辑

我需要：
????公共类指纹

代替

class Fingerprint