"%02d" in android application code

Question

Application code is

DateTime startDate8 = DateTime.now(); 
DateTime endDate8 = new DateTime(2014, 11, 5, 15, 0);

Period period8 = new Period(startDate8, endDate8, PeriodType.dayTime());

PeriodFormatter formatter8 = new PeriodFormatterBuilder()
    .appendMinutes()
    .toFormatter(); 

tw.setText(String.format("%02d",formatter8.print(period8)));

Application dont work. App has stopped unfortunately. What is problem in my code?

Start with the stacktrace. http://stackoverflow.com/questions/23353173/unfortunately-myapp-has-stopped-how-can-i-solve-this — laalto, Nov 05 '14 at 21:03
Please paste it as (copyable, searchable) **text**, not a screenshot! — Jesse W at Z - Given up on SE, Nov 05 '14 at 21:14

Elliott Frisch · Accepted Answer · 2014-11-05T21:19:41.873

1

PeriodFormatter.print() returns a String (and "%02d requires a int). I think you wanted something like

 // tw.setText(String.format("%02d",formatter8.print(period8))); 
tw.setText(formatter8.print(period8));

Or, parse the String to an int like

try {
    int val = Integer.parseInt(formatter8.print(period8));
    tw.setText(String.format("%02d",val));
} catch (NumberFormatException nfe) {
    nfe.printStackTrace();
}

edited Nov 05 '14 at 21:19

answered Nov 05 '14 at 21:14

Elliott Frisch

198,278
20
158
249

What if they really do want it zero filled? – Jesse W at Z - Given up on SE Nov 05 '14 at 21:15
@Tahakörkem Edited. I think the second example should do that. – Elliott Frisch Nov 05 '14 at 21:18
@Elliott Frisch app stopped unfortunately when tw was empty – Taha Körkem Nov 05 '14 at 21:40
Posted code doesn't read `tw`. If you do somewhere, add a test for empty. – Elliott Frisch Nov 05 '14 at 21:41
how i add test for empty – Taha Körkem Nov 05 '14 at 21:48
I don't know, I don't know what your code reading `tw` does. You should probably ask another question. Include the code that stops (presumably where are you reading `tw`) and the logcat in the question. Maybe include what you tried as a test for empty. My guess would be `tw != null && tw.getText().length() > 0` – Elliott Frisch Nov 05 '14 at 21:51
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/64352/discussion-between-taha-korkem-and-elliott-frisch). – Taha Körkem Nov 05 '14 at 22:00

"%02d" in android application code

1 Answers1