Let's have this code

    Set<String> names;
    modelTypes.add("Ada");

NetBeans will correctly mark that as uninitialized variable.

But a hint to "initialize variable" will just do

    Set<String> names = null;
    modelTypes.add("Ada");

My suggestion is that for some interfaces from java.util, NetBeans could initialize with the (assumably) most commonly used implementations, e.g.:

    Set<String> names = new HashSet<>();
    modelTypes.add("Ada");

Rationale:

1) Not often people initialize collections to null.
2) Typing the new ... manually is longer than overwriting with "null", should anyone need it.

Thanks for consideration.