Is there any LinkedTreeMap implementation in java?

Question

is there any LinkedTreeMap implementation available in standard JDK or simple standalone library that support both sorting and insertion order? I found gridsim that has a LinkedTreeMap implementation. But seems it is a big library.

[UPDATE]

I want a Map which sorts elements based on keys which is Integer in my case and also gives me two kinds of Iterator based on:

1. sorted keys
2. insertion order

Answer 1

Can you see the LinkedTreeMap of google-gson library?

This preserve the insertion order.

Answer 2

I also came across this free-standing library: http://tech.dolhub.com/Code/LinkedTree

However, note that the author states that the classes performance is not great compared with TreeMap.