问题描述
我有类似ali123hgj"的东西.我想要整数 123.我怎样才能在java中制作它?
I have something like "ali123hgj". i want to have 123 in integer. how can i make it in java?
推荐答案
使用以下 RegExp(参见 http://java.sun.com/docs/books/tutorial/essential/regex/):
Use the following RegExp (see http://java.sun.com/docs/books/tutorial/essential/regex/):
d+
作者:
final Pattern pattern = Pattern.compile("\d+"); // the regex final Matcher matcher = pattern.matcher("ali123hgj"); // your string final ArrayList<Integer> ints = new ArrayList<Integer>(); // results while (matcher.find()) { // for each match ints.add(Integer.parseInt(matcher.group())); // convert to int }