Convert Integer to String, with leading zeros?

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#1 by (2 votes)
#2 by (0 votes)

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I'm manipulating dates, and I need to convert ints to String without losing the number in front.

That is, 01, 02, 03, 04

I've tried String.valueOf() and Integer.ToString() , but it eliminates the zero on the left

thanks in advance

java string integer

asked by Paco 28.10.2018 в 20:48

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score 2 · Answer 1

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If the idea is that the number always occupies two positions, complemented on the left with zeros, you should use something like this:

String.format("%02d", miVariableNumerica);

Good luck!

answered by 28.10.2018 в 20:52

score 0 · Answer 2

If you want to add a% co_of% of zeros to the left ( padding ), apply a format:

 int valorNumerico = 2;
 String cadena = String.format("%02d" , valorNumerico);

according to the above, leading zeros will have a value of:

If you want to eliminate all zeros, one option would be using this cadena

s.replaceFirst("^0+(?!$)", "")

example:

String  cadena = "000012";
cadena = cadena.replaceFirst("^0+(?!$)", "");

the result of REGEX would be: