"Always answer 'Do you want more data?' with 'Yes, please.'" -- ehhh more data isn't necessarily "Good" Data, there are hundreds of MTurk collection studies to verify the old phrase "Garbage in, Garbage out"
The Java library Encog (<a href="https://github.com/encog" rel="nofollow">https://github.com/encog</a>) has a huge number of features out of the box for building neural networks.