For your information,I have started tern.java 1.1.0 https://github.com/angelozerr/tern.java/wiki/New-and-Noteworthy-1.1.0

I have integrated tern-es6 which gives support for completion, hyperlink for ECMAScript 6. I have started to write wiki about ES6 features at https://github.com/angelozerr/tern.java/wiki/Tern-&-ECMAScript6-support

You can read in this page, that JSDT must be improved to support full features of ES6. I have created 2 bugs:

I will continue to write wiki to show you other ES6 features, will improve too ES6 support like completion guess for ES6 modules like I have done for node required module:

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Hope you will like it.

Regard's Angelo