Hey. Anybody can help me with java interoperabilit...

# getting-started

[jschneider]

Hey. Anybody can help me with java interoperability?
I want to call a method with a wildcard list from java


Kotlin method I want to call:

class DaClass {
  companion object {
    @JvmStatic
    fun convert(strings: Iterable<String>): List<Int> {
      return strings.map { convert(it) }
    }

    @JvmStatic
    fun convert(string: String): Int {
      return java.lang.Integer.parseInt(string)
    }
  }
}

Java-Call:

List<String> list = ImmutableList.of("1", "2");
    System.out.println(DaClass.convert(list));

    List<? extends String> listWithWildcards = ImmutableList.of("1", "2");
    System.out.println(DaClass.convert(listWithWildcards)); //Does *not* compile

[jschneider]

Ok. Found it: fun convert(strings: Iterable<@JvmWildcard String>): List<Int> {

[the.fine]

Did you try to use Iterable<out String> ?

[jschneider]

The type for Iterable is already defined as "out"