题解 | #在字符串中找出连续最长的数字串#

import java.util.*;

// 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);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String str = in.nextLine();
            List<String> t = Arrays.asList(str.split("\\D+"));
            t.sort((o1, o2) -> o2.length() - o1.length());
            StringBuilder sb = new StringBuilder();
            sb.append(t.get(0));
            int len = t.get(0).length();
            for (int i = 1; i < t.size(); i++) {
                if (t.get(i).length() == len) {
                    sb.append(t.get(i));
                }
            }
            System.out.printf(sb + "," + len);
        }
    }
}