OJ Board

I'm having a lot of frustrating problems submitting code in Java. First I tried to use Scanner but it complained. I tried BufferedReader and it complained too. I adjust the sample problem solution and it didn't complain but started complaining on BigInteger.

I read the boards but the topics about Java aren't updated. So I what to know what's the deal currently with Java: which packages are supported?

Thanks.

I'm interested in java support, too. Do anyone know information about packages?