Mixing scala and java in Play Framework

Question

I have a Java file that looks like this:

package AuthorizeNetFingerprint;


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


        

Answer 1

Three things:

1. As you've already figured out, your Fingerprint class needs to be public.
2. You've made Fingerprint's constructor private; you can't instantiate it.
3. Any static methods in a Java class should be accessed through the class' companion object in Scala.

All the Scala code in your example should be replaced by:

val x_fp_hash = AuthorizeNetFingerprint.Fingerprint.createFingerprint(…)

This works in the Scala (2.9.1) console, compiled with sbt (0.11.3).

Yes, you can mix Java and Scala in a Play2 application, just put the Java code in the app directory. Note that Java classes need to be in their corresponding package directories, which is not the case for Scala classes.