Why need PrintWriter?

Question

I am really confused about the purpose of various io classes, for example, If we have BufferedWriter, why we need a PrintWriter?

BufferedReader reader = new Buff         


        

Answer 1

The PrintWriter is essentially a convenience class. If you want to quickly and easily blast out a line of text to e.g. a log file, PrintWriter makes it very easy.

Three features:

• The print and println methods will take any data type and do the conversion for you. Not just String.
• The relatively new format method is worth its weight in gold. Now it's as simple in Java as in C to output a line of text with C-style format control.
• The methods never throw an exception! Some programmers are horrified at the possibility of never hearing about things going wrong. But if it's a throwaway program or doing something really simple, the convenience can be nice. Especially if output is to System.out or System.err which have few ways of going wrong.