Well done on yer baby Java's,
If there not taking egg food try adding some soak seed to the egg food,
Basically take a scoop of soak seed, place in a tub and pour cold water enough to cover the seed, preferably do this first thing in the morning or evening when you would normally feed yer birds,
Place the tub in the fridge for 24 hrs till the following morning / evening and then drain off the excess water and rinse under the tap in a sieve.
Eaither add this to the egg food or feed separate
Be lucky