Read data from and write data to file using buffering technique

Using buffering can greatly increase the performance of an application. Buffering reduces the number of I/O operations by first combining smaller outputs together in memory. The number of actual physical I/O operations is small compared with the number of I/O requests issued by the program. Thus, the program that’s using buffering is more efficient.

BufferedInputStream and BufferedOutputStream should be used instead of FileInputStream and BufferedOutputStream, respectively.