String中找最长数字串（java）

java

技巧：在最后加一个字符

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        while(in.hasNext()){
            String s = in.nextLine();
            s += "e";
            LinkedList<String> list = new LinkedList<>();
            int curLen = 0;
            int max = 0;
            StringBuilder sb = new StringBuilder();
            for (int p1 = 0; p1 < s.length(); p1++){
                char cc = s.charAt(p1); 
                if (isNumber(cc)){
                    curLen++;
                    sb.append(s.charAt(p1));

                }else if (!isNumber(s.charAt(p1)) && curLen != 0){
                    if (curLen == max){
                        list.add(sb.toString());
                    }else if (curLen > max){
                        list.clear();
                        list.add(sb.toString());
                        max = curLen;
                    }
                    curLen = 0;
                    sb = new StringBuilder();
                }

            }
            String output = "";
            for (int i = 0; i < list.size(); i++){
                output += list.get(i);
            }
            output += ",";
            output += max;
            System.out.println(output);
        }
    }
    private static boolean isNumber(char c){
        return c >= '0' && c <= '9';
    }
}

把非数字全部变成'a'

按a分割

 String[] strs=str1.split("a");