Java Compatibility

This chapter shows how to convert Java collections to Scala and vice versa. It covers how Scala traits relate to Java interfaces, and details how both things can cooperate. Java enums are then mapped into the Scala world. The chapter also examines the available conversions between Scala and Java collections. The usage of Scala's traits in Java, however, needs some knowledge about how the trait is compiled to the byte-code. Unfortunately, there is not a direct translation from Java to Scala in terms of Enumeration. One can split their project to include enumeration using Java enumerations by having Java files for using Java enumeration. However, if one can handle a slight paradigm shift in how to utilize enumerations, he/she can enact one of two Scala-based alternatives. These are all examples that illustrate how the creators of Scala took the Java compatibility issue seriously.