I have something like this in java: test.jar

package test; public class C1 { public static class C2 { } }

How could I import it in Fantom? Anything I tried without succeed.

using [java] test::C1::C2

using [java] test::C1.C2

...

All failed. Please help. On Java we only has dot so it's really simple. On Fantom, we also have :: so thing got very complicated. Please update the document to add such example ussage. Thanks.

Hiya, Inner Java classes are mentioned in the JavaFFI under innerClasses. The notation you're missing is:

using [java] test::C1$C2 as C2

It's a bit messy, but it should work.

Thank you, SlimmerDude. You saved my day! My eyes are so bad now as I missed this section on the document even having read it so many times :(

While waiting for help I tried with a small test and it seemed that Fan doesn't support nested classes like Java does.

When I write something like this:

public class A { public static class B { ... } }

F4 always present me with errors :(

Correct, Fantom does not support inner classes.

Brian reasoned it in this post:

Fantom doesn't support inner classes largely for two reasons:

1) you often use closures and

b) to keep type namespace simple and flat (to avoid overloads of the dot operator)

This is reasonable. I only want to use this java class. I don't think I will ever want to use nested class in Fan :)