Java Data Type - 如何从字符串中取数字

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main {
  public static void main(String[] args) {
    Pattern p = Pattern.compile("\\d+");
    Matcher m = p.matcher("(345+3)*/3asdf234234234/234234234/23asdfaasd1f2a3s4d54fadsf");
    while (m.find())
      System.out.println(m.group());
  }
}