I was wondering if Java has some sort of class to help on output formatting. I know in C++, in iomanip, there is a method call setw. I was wondering if Java has something similar to this.
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What output are you trying to achieve? Is this a console program or a GUI program and if the latter, what GUI library are you using?Hovercraft Full Of Eels– Hovercraft Full Of Eels2010-12-11 17:16:28 +00:00Commented Dec 11, 2010 at 17:16
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4 Answers
Have a look at java.util.Formatter.
String.format() provides a convenient wrapper.
For example (modified from an example on the link):
String s = String.format("e = %+10.4f", Math.E);
It goes beyond C's ?printf formats. For example, it supports an optional locale, and format symbols can be associated with an argument by explicit index rather than implicit.
Edit: Fixed the link above.
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String.format(..) and possibly java.text.*
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There's the Formatter class and its variants: String.format, PrintStream.printf.
answered Dec 11, 2010 at 17:11
Hovercraft Full Of Eels
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The simplest approach is to use printf() which works much the same as printf() in C.
double pi = Math.PI;
System.out.printf ("pi = %5.3f%n", pi);
