How to make a 4 digit integer

Question

I want to make an integer value from the range 1-9999. But the integer values should be always in 4 digits.

Like 0001, 0002, 0015, 0156, 1578

You'd need to use a string pad function, or you could have a string with some numeric characters. My guess is the former is what you're looking for. — Philip Rollins, Aug 25 '16 at 02:35
You are mixing up different concepts. Integers are just **numbers**. And 1, as a number is always that: a 1. It doesn't know about "leading zeros". What you are talking about is a **string** representing a number. Because then, strings can have a fixed length, and then you might add leading zeros to enhance "number 1" to "0001". — GhostCat, Aug 25 '16 at 02:49

score 7 · Accepted Answer · answered Aug 25 '16 at 02:37

7

You can probably use String format of the integer you willing to, like this:

String.format("%04d", your integer));

This will always show missing 0 on the left on digits like 01 or 1.

answered Aug 25 '16 at 02:37

Jose Bernhardt

score 2 · Answer 2 · edited Oct 01 '22 at 22:10

2

System.out.format("%04d%n", n);

edited Oct 01 '22 at 22:10

desertnaut

answered Aug 25 '16 at 02:38

ThanatosDM

score 1 · Answer 3 · edited Oct 01 '22 at 22:11

1

If you want to print 4 digit integer:

System.out.printf("%04d%n",your integer);

If you want to store in a variable:

String str=String.format("%04d", your integer));

3 Answers3