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How can I convert a java.util.Set[String] to a scala.collection.Set with a generic type in Scala 2.8.1?
import scala.collection.JavaConversions._ var in : java.util.Set[String] = new java.util.HashSet[String]() in.add("Oscar") in.add("Hugo") val out : scala.collection.immutable.Set[String] = Set(in.toArray : _*) And this is the error message
<console>:9: error: type mismatch; found : Array[java.lang.Object] required: Array[_ <: String] val out : scala.collection.immutable.Set[String] = Set(javaset.toArray : _*) What am I doing wrong?
797
A Java Set can be converted to a Scala Set by importing JavaConversions. asScalaSet method. Here, we need to call asScalaSet method which has a java Set as its argument. Therefore, this method returns a Scala Set.
Decompile Scala code to Java In the Project tool window, right-click a Scala library class that you want to decompile. From the context menu, select Decompile Scala to Java. IntelliJ IDEA converts code to Java and opens the converted file in the editor.
Use JavaConverters instead
import scala.collection.JavaConverters._ val out = in.asScala out: scala.collection.mutable.Set[String] = Set(Hugo, Oscar) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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