what are the benefits of BufferedReader over Scanner

Question

here\'s a code about depth first search in graphs. who knows why bufferedReader class were used in this code? and why nextInt function not used instead? what is its privileg

Answer 1

BufferedReader is simpler (which makes it slightly more efficient) but it is also a clearer choice showing you intend to do is to use the functionality BufferdReader provides. i.e readLine() is the main one.

In short, if you have BufferedReader you know it is just going to read lines. If you use Scanner it implies you may or many not be reading something more complicated.

BTW:

  Integer.parseInt(br.readLine())

and

  scanner.nextInt();

are not the same although the distinction is usually lost on noob developers. For this reason I prefer the first example. The difference is how new lines are handled.