trivial string formatting problem that I just cannot find the answer to

[rippon]

Despite all my searching on the web and in books, I cannot find the solution to this trivial problem.

All I want to do is output (in a JTextField called 'messageBox') the value of PI to two decimal places in a text field of total length five characters.

I think I need to do some 'wrapping' and then some string formatting, and I +think+ I need to give the format method a formatting string. Hope the intent of the following attempted code is clear, and hope you can help. Thanks in advance.

            double myPI = 3.1415926535;
            Double myWrappedPI = 0.0;

            myWrappedPI = myPI;
            messageBox.setText("myWrappedPI approximated is: " + 
                              myWrappedPI.toString().format("%5.2d"));

[pbrockway2]

You might find the format() method of String easier to deal with

String.format("%5.2f", myPI);
String.format("%5.2f", myWrappedPI);

Note d is for decimal (a way of representing ints), f is for floatingpoint.

[rippon]

It works! Thanks.

[pbrockway2]

You're welcome.

For future reference the format string syntax is described (and somewhat illustrated) in the Formatter API docs: there is too much there to absorb in a single session, but I find it's a handy place to go back to when I want something formatted (date, hex value etc).