How many subclasses of Reader Class are there in Java?

There are 6 subclasses of reader Class in Java. These are 1) BufferedReader for buffering other readers 2) ChararrayReader for reading from char array 3) FilterReader for readin filter streams 4) InputStreamReader for reading a character stream 5) PipedReader for reading from pipe 6) StringReader for reading from a string.So this is the correct answer.