What is the relationship between InputStream, BuffreredInputStream, InputStreamReader and BufferedReader?

Question

I am always embarrassed when I process my input as which process. At different times, I find different solutions. I also do not quite understand their Hierarchy.

Answer 1

An InputStream is the parent class of all input streams and readers. Classes with the Stream keyword will work with bytes, while classes with the Reader keyword will work with characters.

A buffer is a wrapper around these threads to reduce system calls and improve performance and read speed.

Non-buffered streams return one byte each time, while a Bufferd stream does not return until the buffer is full.

For example, if you take a BufferedReader, you can read the whole line using readLine(), but in non buffered stream, you must read a single character using the method read().