Valid Java code that is NOT valid Groovy code?

Question

Most Java code is also syntactically valid Groovy code. However, there are a few exceptions which leads me to my question:

Which constructs/features in Java are syn

Answer 1

Has anyone mention the difference in ==? I took this is from Grails documentation.

== means equals on all types. In Java there's a wierd part of the syntax where == means equality for primitive types and == means identity for objects.