how to transform java map to scala map

[gui]

        The solution, http://stackoverflow.com/questions/24416480/how-do-i-convert-a-java-util-map-to-scala-collection-immutable-map-in-java,  is right for me in java 8 and scala 2.10 or scala 2.11. The error message is "cannot access scala.Predef.$less$colon$less".

         Can anyone have another idea? thanks