How to implement a nested java interface in scala

Question

Say I have the following legacy java defined:

abstract class A {

  abstract I foo();

  public interface I
  {
    int bar();
  }
}

And I want to implement this in scala something like the following:

class MyA extends A {

  def foo() = new I {

    def bar = 3

  }
}

The scala will not compile with the error

not found: type I

How can I refer to the java interface I in my scala code?

Community · Accepted Answer · 2017-05-23 12:22:07Z

2

Looking at your java code through scala-colored lenses, you'll see

Since the companion's members are not auto-imported inside the class, you'll need to use A.I or import it first:

def foo() = new A.I { ... }

// or with an import
import A.I
def foo() = new I { ... }

CommunityBot

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answered Apr 21, 2015 at 16:05

gourlaysama

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Comments

pedrofurla · Accepted Answer · 2015-04-21 16:02:13Z

1

This code worked for me:

class MyA extends A {
  def foo() = new A.I {
    def bar = 3
  }
}

answered Apr 21, 2015 at 16:02

pedrofurla

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