How can I use a Scala singleton object in Java?

Question

I have a Scala object that I need to use in a Java class.

Here's the Scala object

object Person {   val MALE = "m"   val FEMALE = "f" } 

How can I use this Scala object in Java?

I have tried the following so far without success (compile errors):

• Person.MALE() //returns a String which is useless as I want the actual Person object

Answer 1

Use Person$.MODULE$. See also

• How can I pass a Scala object reference around in Java?
• Singletons as Synthetic classes in Scala?

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Edit: A working example (I checked, it compiles and works): Scala:

object Person {   val MALE = "m"; } 

Java counterpart:

public class Test {     Person$ myvar = Person$.MODULE$;      public static void main(String argv[]) {         System.out.println(new Test().myvar.MALE());     } } 

Answer 2

In case you use a package object, the access is a bit different

Scala:

package my.scala.package  package object Person {   val MALE = "m"; } 

Java counterpart:

public static void main() {   System.out.println(my.scala.package.Person.package$.MODULE$.MALE); }