CODEWITHSUNDEEP
javastring
user2467545
user2467545

Reputation:

How to extract the number from a string in Java?

I have my below string as 

String version = "v2";

here version can be any of these values - 

v3
v4
v5
..
v10
v11
..
v100
..
v500
..
v1000

I would like to extract number from the above string so which could be 2, 3, 4, 5, 10, 11, 100, 500, 1000 from it.

What is the correct way to extract only the number from it?

Upvotes: 0

Views: 134

Answers (2)

DRastislav
DRastislav

Reputation: 1882

You can use regex:

Pattern p = Pattern.compile("[0-9]+");
    Matcher m = p.matcher(your string);
    while (m.find()) {
        int n = Integer.parseInt(m.group());

Upvotes: 1

rgettman
rgettman

Reputation: 178263

If the first character is always 'v', then remove it from the string, then call Integer.parseInt:

int n = Integer.parseInt(version.substring(1));

Upvotes: 7

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