When dealing with any of the libraries or API's it's helps to know what's going on under the hood. I find these pages to be invaluable.

https://en.bitcoin.it/wiki/Transactions
https://en.bitcoin.it/wiki/Protocol_specification
https://en.bitcoin.it/wiki/Script

On 30/04/15 11:28, Jorge Timón wrote:
Well, if you're interested in learning java while learning bitcoin,
probably you should be looking at https://github.com/bitcoinj/bitcoinj
or one of its related project (like the android bitcoin wallet based
on it).
There's a getting sterted page: https://bitcoinj.github.io/#getting-started

These links my be useful too:

https://bitcoin.org/en/bitcoin-for-developers
https://bitcoin.org/en/developer-documentation


On Thu, Apr 30, 2015 at 11:35 AM, Telephone Lemien
<lemientelephone@gmail.com> wrote:
Hello,
I'm a beginner in Bitcoin and I want to know, what are things those allo me
to understand Bitcoin protocol and make progress in java to become a good
developper.
Please tell me how I can begin.
Best regards

2015-04-30 10:08 GMT+02:00 Jorge Timón <jtimon@jtimon.cc>:
As Mike says it depends on your interests. But one thing that is almost
always welcomed is improving the tests, and it is unlikely that it conflicts
with other people's PRs (unless they're changing that part of the code and
need to update those tests. Improving documentation is also good and you can
do that while reading the code. Usually I just start cloning, compiling and
changing things as I read, "if I understand this correctly, this change
should not break the tests, if I understand this, this other change should
break the build", etc.
But again, is up to you.

On Apr 16, 2015 2:34 PM, "Mike Hearn" <mike@plan99.net> wrote:
Hey Gabe,

That's diving into the deep end for sure! :)
What are some current things that are lacking in Bitcoin core? Or am I
better off making something else for the ecosystem?
That depends on your interests.

Many of the highest priority tasks in Bitcoin Core are rather
complicated, unfortunately, even for people with experience. You can consult
the issue tracker to get a feel for it.

Alternatively, there are lots of wallet apps out there and plenty of more
straightforward projects on them. However they may have less of a research
flavour.


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