So your Javas are doing ok. Make sure you unbury them, those are rhizomes and not roots. You can tie them with thread to a log or rock, but need to have access to the water column.
Im not as experienced with swords, but they really seem to like CO2 injection but could possibly get by with fertz, more light, higher dose of excel and mebbe some N,P,K tabs (search osmocote + on this forum easy to make or purchase). I would say 4-5 cap ful of excel daily (gradually increasing) as well and you should be able to get them growing. Someone else may have more experience and have a better idea.
Id recommend plants like Crypts, Bacopa, Camboba, hygrophila angustifolia, and other "low tech" plants (see low tech forum)