How can I pad an integer with zeros on the left?

Question

How can I pad an integer with zeros on the left?

How do you left pad an int with zeros when converting to a String in java?

I'm primarily looking to pad out integers up to 9999 with leading zeros (e.g. 1 = 0001).

zero-pad formatting java

4 years ago by Kajalsi45d

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**akshay1995** · Answer 1 · 2021-06-05T11:45:27

Use java.lang.String.format(String,Object...) like this:



String.format("%05d", yournumber);

for zero-padding with a length of 5. For hexadecimal output replace the d with an x as in "%05x".

The full formatting options are documented as part of java.util.Formatter.

**pankajshivnani123** · Answer 2 · 2021-06-07T14:30:01

Let's say you want to print 11 as 011
You could use a formatter: "%03d".

You can use this formatter like this:



int a = 11;

String with3digits = String.format("%03d", a);

System.out.println(with3digits);

Alternatively, some java methods directly support these formatters:

System.out.printf("%03d", a);

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How can I pad an integer with zeros on the left?

2 Answers

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