number out of string in java

Question

I have something like \"ali123hgj\". i want to have 123 in integer. how can i make it in java?

Answer 1

Use the following RegExp (see http://java.sun.com/docs/books/tutorial/essential/regex/):

\d+

By:

final Pattern pattern = Pattern.compile("\\d+"); // the regex
final Matcher matcher = pattern.matcher("ali123hgj"); // your string

final ArrayList ints = new ArrayList(); // results

while (matcher.find()) { // for each match
    ints.add(Integer.parseInt(matcher.group())); // convert to int
}