Good and readable java codes?

Hello,

I have been solving all the problems till now in C now I want to shift to JAVA.
I know about the fast I/O methods in C but I want to learn those about those methods
in JAVA.

I would like to read good JAVA codes for these methods. where to find those?
whose codes should I refer?

Thank you

You could try reading the Java submissions of people who took the minimum time in solving a particular problem. Filter the submissions for a problem by Java and AC and sort by time.

I want to read good codes…because I want to learn those methods…I have seen some codes but those were not very easy to understand!

You can refer to below link.

EgorK and uwi have elegant and clean codes.
uwi
EgorK

Good set of Java solutions here.
http://www.sourcetricks.com/p/java-tutorials.html