Finding an integer in string

Question

let say i have string like string s = "Page (34).jpg"
now i want to take the 34 as integer..
i do loop form char 1 to s.length(), i get the string substring
substring will always return string, but how to know whether the substring is string or integer
is there any method in java, like isInteger and return boolean?
Thanks

Answer 1

Matcher matcher = Pattern.compile("\\d+").matcher(s);
if (matcher.find())
    int value = Integer.parseInt(matcher.group());
}