题解 | #表示数字#

import java.util.*;
public class Main {
        public static void main(String[] args){
            Scanner sc = new Scanner(System.in);
            while(sc.hasNext()){
                String s = sc.nextLine();
                StringBuilder sb = new StringBuilder();
                //System.out.println(s.replaceAll("([0-9]+)","*$1*"));
                for(int i=0;i<s.length();){
                    char c = s.charAt(i);
                    if(c>='0'&&c<='9'){
                        sb.append("*");
                        while(i<s.length() && s.charAt(i)>='0' && s.charAt(i)<='9'){
                            //继续遍历i后面的字符串,看是不是继续是数字
                            sb.append(s.charAt(i++));
                        }
                        sb.append("*");
                    }else{
                        sb.append(s.charAt(i++));
                    }
                }
                System.out.println(sb.toString());
            }
        }
}