How do I format a number in Java?

Question

How do I format a number in Java?
What are the "Best Practices"?

Will I need to round a number before I format it?

32.302342

Answer 1

There are two approaches in the standard library. One is to use java.text.DecimalFormat. The other more cryptic methods (String.format, PrintStream.printf, etc) based around java.util.Formatter should keep C programmers happy(ish).