优优优质题解！！！！！

解题思路:

注意事项:

参考代码:public static void main(String[] args) {
   int zimu =0;
   int shuzi =0;
   int kongge =0;
   int other =0;
   Scanner sc =new Scanner(System.in);
   String str = sc.nextLine();
   char [] ch = str.toCharArray();
   for (int i = 0; i <= ch.length-1 ; i++) {
       if (Character.isLetter(ch[i])){
           zimu++;
       }else if (Character.isDigit(ch[i])){
           shuzi++;
       }else if (Character.isSpaceChar(ch[i])){
           kongge++;
       }else{
           other++;
       }
   }
   System.out.println(zimu+" "+shuzi+" "+kongge+" "+other+" ");
}