Why do I need jsr305 to use guava in scala?

Question

I have the following scala file:

object SGuavaTryout {
  com.google.common.cache.CacheBuilder.newBuilder()
}

I compile with guava-11.0.2.ja

Answer 1

That's because of the way the Scala compiler is designed, it requires all the types exposed by a class to be available at compile time, whereas the Java compiler effectively doesn't care.