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Java Java Objects (Retired) Delivering the MVP Validation

Posted by Naphtali Matione
Naphtali Matione
5,224 Points

system.out.println and system.out.printf

how do i know when to use either system.out.println or system.out.printf

2 Answers

Craig Dennis
STAFF
Craig Dennis
Treehouse Teacher
Craig Dennis
Craig Dennis
Treehouse Teacher

If you want to print formatted text, IE: replace a value in a string using %s, you should use printf.

You can actually concatenate strings using + and still use println, but IMO that is harder to read and a waste of effort when there is a tool developed specifically for that. println adds a new line, there is also System.out.print which does not.

That help?

Naphtali Matione
Naphtali Matione
5,224 Points

thanx craig, u made crystal clear

Michael Newman
Michael Newman
39,508 Points
Michael Newman
Michael Newman
39,508 Points

I was confused about this as well, but I know it has to do with formatting the string you are printing. This is the best link I've found on the subject right now. http://docs.oracle.com/javase/tutorial/java/data/numberformat.html

Naphtali Matione
Naphtali Matione
5,224 Points

thanx micheal, il check it out