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 line = in.nextLine();
            calcu(line);
        }
    }

    public static void calcu(String line) {
        int max=1;
        List<String> list = new ArrayList<>();
        for(int i=0;i<line.length();) {
            while(i<line.length()&&!Character.isDigit(line.charAt(i))) {
                i++;
            }
            int start=i;
            while(i<line.length()&&Character.isDigit(line.charAt(i))) {
                i++;
            }
            String tmp = line.substring(start, i);
            list.add(tmp);
            // System.out.println(tmp);
            if(max<tmp.length()){
                max = tmp.length();
            }
        }
        for(String t:list) {
            if(t.length()==max) {
                System.out.print(t);
            }
        }
        System.out.println(","+max);

    }
}