Convert Scala Seq to Java List

Question

I am working in Java. I am calling a scala function which returns a Seq[String]. To convert it to java's List, I tried using scala.collection.JavaConverters's asJava. But this does not seem to work.

Answers on similar questions have suggested either using JavaConversions or WrapAsJava, both of which are deprecated.

Similar Question - Converting Scala seq<string> to Java List<string>

//someScalaFunc returns a Seq[String]
List<String> listA = someScalaFunc();

chengpohi · Answer 1 · 2017-09-08T03:54:19.723

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Since JavaConversions is deprecated, You can use JavaConverters for this:

List<String> listA = scala.collection.JavaConverters.seqAsJavaList(someScalaFunc())

edited Sep 08 '17 at 03:54

answered Sep 08 '17 at 02:44

chengpohi

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This worked fine, but I tried to import it statically, but someScalaFunc() is a generic function. Is there a way to import it in a static fashion, and avoid using class name with the function call? – piyush aggarwal Sep 08 '17 at 06:03
import `import static scala.collection.JavaConverters.seqAsJavaList` and use `seqAsJavaList(someScalaFunc())`, Isn't it enough? – chengpohi Sep 08 '17 at 06:29
No, it gives this error - seqAsJavaList (Seq) in javaconverters cannot be applied to Seq And I checked that generic functions cannot be imported in a static way, either full class name has to be used or their return value should be stored in an intermediate variable. In this case intermediate variable cannot be used to store the scala Seq. – piyush aggarwal Sep 08 '17 at 07:29
@piyushaggarwal try `JavaConverters.seqAsJavaList(someScalaFunc())` – Sergey Sep 08 '17 at 08:03

score 2 · Answer 2 · answered Sep 08 '17 at 03:52

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You can use a Java to Scala implicit converter by importing the following:

import scala.collection.JavaConversions._

answered Sep 08 '17 at 03:52

Sohum Sachdev

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score 0 · Answer 3 · edited Sep 08 '17 at 08:17

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import scala.collection.JavaConverters._

val scalaList = List("A", "B", "c")

scalaList.asJava

edited Sep 08 '17 at 08:17

Sergey

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answered Sep 08 '17 at 05:58

Learner

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Convert Scala Seq to Java List

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