Instantiate scala.Int in Java

I'm writing the persistence layer for the SecureSocial plugin of Play 2 framework. I found an example at https://github.com/play-modules/modules.playframework.org/blob/master/app/models/ss/MPOOAuth2Info.java: ``` package models.ss; import models.AbstractModel; import securesocial.core.java.OAuth2Info; import javax.persistence.Entity; @Entity public class MPOOAuth2Info extends AbstractModel { public String accessToken; public String tokenType; public Integer expiresIn; public String refreshToken; public MPOOAuth2Info() { // no-op } public MPOOAuth2Info(OAuth2Info oAuth2Info) { this.accessToken = oAuth2Info.accessToken; this.tokenType = oAuth2Info.tokenType; this.expiresIn = oAuth2Info.expiresIn; this.refreshToken = oAuth2Info.refreshToken; } public OAuth2Info toOAuth2Info() { OAuth2Info oAuth2Info = new OAuth2Info(); oAuth2Info.accessToken = this.accessToken; oAuth2Info.tokenType = this.tokenType; oAuth2Info.expiresIn = this.expiresIn; oAuth2Info.refreshToken = this.refreshToken; return oAuth2Info; } } ``` But the API was changed so I can't use `securesocial.core.java.OAuth2Info`. SecureSocial is written by Scala and this class was a Java front-end. So I decided to use Scala directly where: ``` case class OAuth2Info(accessToken: String, tokenType: Option[String] = None, expiresIn: Option[Int] = None, refreshToken: Option[String] = None) ``` My result: ``` package models.security.securesocial; import models.AbstractModel; import scala.Option; import securesocial.core.*; import javax.persistence.Entity; /** * Persistence wrapper for SecureSocial's {@link } class. * * @author Steve Chaloner (steve@objectify.be) */ @Entity public class MPOOAuth2Info extends AbstractModel { public String accessToken; public String tokenType; public Integer expiresIn; public String refreshToken; public MPOOAuth2Info(){ // no-op } public MPOOAuth2Info(OAuth2Info oAuth2Info){ this.accessToken = oAuth2Info.accessToken(); this.tokenType = oAuth2Info.tokenType().get(); this.expiresIn = scala.Int.unbox(oAuth2Info.expiresIn().get()); this.refreshToken = oAuth2Info.refreshToken().get(); } public OAuth2Info toOAuth2Info(){ return new OAuth2Info(accessToken, Option.apply(tokenType), Option.apply(SOME_TRANSFORMATION(expiresIn)), Option.apply(refreshToken)); } } ``` But I have problems with convertation of `scala.Int` to/from `java.lang.Integer` types. To convert `scala.Int` to `java.lang.Integer` I used `scala.Int.unbox()`. Is it connect way? And I don't know how to convert `java.lang.Integer` to `scala.Int`: in the code I typed pseudo code `SOME_TRANSFORMATION()`. What is the correct implementation of this SOME_TRANSFORMATION? Thank you