Quantifier to print only 3 digit numbers in Java regex

Question

What is a quantifier to print only 3-digit numbers per string in Java regex?

Input : 232,60,121,600,1980
Output : 232,121,600

Instead, my output comes in like:

Output : 232,121,600,198

I am using (\\d{3})

. What quantifier should I use to print only three-digit numbers?

+3

user3709312 May 29 '15 at 18:34

1 answer

Wiktor Stribiżew · Accepted Answer · 2015-05-29T18:38:34+0000

You need to use a word border \b

:

\b\d{3}\b

In Java, use double slashes:

String pattern = "\\b\\d{3}\\b";

You don't need to use a capture group around the whole regex, you can access the match via .group()

. See IDEONE demo