Replace `java.util.List<E>` parameters with `E[]` parameters in method signatures

This library is developed using the Java language, but the majority of users are working with it using the Scala language.

Method signatures should be "designed" in a way that would eliminate the need for Scala-to-Java type casts and/or conversions. For example, the List type is different/incompatible between these two languages, whereas the array type is the same.