This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
ByteBuffer class uses channels like "FileChannel" to read data from files.
Have you seen methods available ByteBuffer and FileChannel classes?
I think there is no readLine() method available.
But you can do similar by allocating a buffer size and than setting initial offset and capacity
also you can extract the specific part of data from buffer using utilities like subString,indexOf.