How to get Scala List from Java List?

Question

I have a Java API that returns a List like:

public List getByXPath(String xpathExpr)

I am using the below scala code:

Answer 1

If you have to convert a Java List to a Scala List[ClassB], then you must do the following:

1) Add

import scala.collection.JavaConverters._

2) Use methods asScala, toList and then map

List  javaList = ...
var scalaList[ClassB] = javaList.asScala.toList.map(x => new ClassB(x))

3) Add the following to the ClassB constructor that receives ClassA as a parameter:

case class ClassB () {
   def this (classA: ClassA) {
      this (new ClassB (classA.getAttr1, ..., classA.getAttrN))
   }
}