题解 | #在字符串中找出连续最长的数字串#正则

import java.util.*;
import java.util.stream.*;
import java.util.regex.*;
import java.util.function.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextLine()) {
            List<String> list = numStr(in.nextLine());
            System.out.printf("%s,%d\n", String.join("", list), list.get(0).length());
        }
    }

    static List<String> numStr(String line) {
        Matcher matcher = Pattern.compile("(\\d+)").matcher(line);
        LinkedHashMap<String, Integer> map = new LinkedHashMap<>();
        int max = Integer.MIN_VALUE;
        while (matcher.find()) {
            String aimed = matcher.group();
            map.put(aimed, aimed.length());
            max = Math.max(max, aimed.length());
        }
        int finalMax = max;
        List<String> list = map.entrySet().stream().filter(e -> {
            return e.getValue() == finalMax;
        }).map(Map.Entry::getKey).collect(Collectors.toList());
        return list;
    }
}