Java string.format overall width with multiple params

Question

I'm trying to format a string using Java's String.format. I need to create a string like this: "<padding spaces> int1 / int2".

Right now I have the following format: " %1$d/%2$d10" or "%1$d10/%2$" (or just "%1$d/%2$d", without the width setting) but this is not working correctly. I want to have the string aligned to the right, with empty spaces as padding for a total width of 10.

I'm using "%1$10.1f" elsewhere in my code, for a single float. The double integers need to be padded to the same width.

I have googled my brains out, but am unable to find a way to pad the total string instead of the two individual integers. Help would be appreciated!

Pardon my mobile formatting

kwantuM
– kwantuM

2017-01-16 21:41:46 +00:00
Commented Jan 16, 2017 at 21:41 — kwantuM
– kwantuM, Commented Jan 16, 2017 at 21:41

Jonny Henly · Accepted Answer · 2017-01-16 21:42:50Z

1

Create the double integer string first using:

int one = 1;
int two = 2;
String dints = String.format("%d / %d", one, two);

Then format the string dints with a width of 10:

String whatYouWant = String.format("%10s", dints);

Printing whatYouWant should output:

     1 / 2

You can also do it in one call, at the cost of readability, for instance:

String whatYouWant = String.format("%10s", String.format("%d / %d", one, two));

Or shorter:

String whatYouWant = String.format("%10s", one + " / " + two);

edited Jan 16, 2017 at 21:42

answered Jan 16, 2017 at 21:36

Jonny Henly

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3 Comments

kwantuM Over a year ago

So there is no way to do it in one call? Also, I need to use a padding of 9 in the second step for the string to have the same width as the float version. Can you explain why? Thanks a lot!

Jonny Henly Over a year ago

I updated my answer to address your first question. I'm not exactly sure why you have to use a padding of 9, perhaps you have a space in front of %10s whereas I do not. So your format string is " %10s" whereas mine is "%10s".

kwantuM Over a year ago

The bug was indeed somewhere else. Code is working fine

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