[Trisquel-users] Re : VirtualBox, Eclipse Java

[lcerf]

One problem with VirtualBox is that only a proprietary compiler, Open Watcom,  
can compile the code of its BIOS.  Another problem is the "VirtualBox OSE  
Guest Additions", which are proprietary:  
http://changelogs.ubuntu.com/changelogs/pool/multiverse/v/virtualbox-guest-additions-iso/virtualbox-guest-additions-iso_5.2.11-122181-1/copyright

As chaosmonk wrote, Eclipse is in Trisquel's repository.  That repository  
includes as well OpenJFX 8, which may be all you need.