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.hasNext()) { // 注意 while 处理多个 case
            String a = in.next();

            String[] arr = a.split("[^0-9]+"); //数字子串数组
            int max = 0;
            List<String> list = new ArrayList<>();
            
            for(String s: arr){
                if(s.length() > max){
                    max = s.length();
                    list.clear();
                    list.add(s);
                }else if(s.length() == max){
                    max = s.length();
                    list.add(s);
                }
            }

            StringBuffer sb = new StringBuffer();
            for(String ss: list) sb.append(ss);
            System.out.println(sb.toString() + "," + max);
        }
    }
}