Cannot Find symbol compile error, need help!

I decided to code this quiz I took in class about asking the user to input a string and the code is suppose to check for upper case letters. If a upper case letter is found, it should increase a count by one. Once the check is done, it should display the number of uppercase letters. For some reason I am getting this weird compile error stating that symbols can't be found. Can anyone help me?

Java Code:

import java.util.*;
import java.lang.*;
public class StringCheck{
   public static void main(String[] args){
      Scanner input = new Scanner(System.in);
      System.out.println("please enter a string: " );
      String s = input.nextLine();
      int count = 0; 
      for(int i = 0; i < s.length(); i++){
         if(Character.s.charAt(isUpperCase(i))){
            count++;
         }
      } 
      System.out.println("the number of uppercase letters is: " + count);
   }  
}