题解 | #在字符串中找出连续最长的数字串#

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNext()) {
            char[] char_str = in.nextLine().toCharArray();
            List<Character> list = new ArrayList<>();
            List<String> str = new ArrayList<>();
            int max_length = 0;
            for (char index : char_str) {
                list.add(index);
            }
            Iterator<Character> iter = list.iterator();
            StringBuilder str_big = new StringBuilder();
            while (iter.hasNext()) {
                char index = iter.next();
                if (Character.isDigit(index)) {
                    str_big.append(index);
                } else {
                    str_big.delete(0, str_big.length());
                }
                if (str_big.length() > max_length) {
                    str.clear();
                    str.add(String.valueOf(str_big));
                    max_length = str_big.length();
                } else if (str_big.length() == max_length) {
                    str.add(String.valueOf(str_big));
                }
            }
            str.forEach(index -> System.out.print(index));
            System.out.println("," + max_length);
        }
    }
}