Finding all uppercase letters of a string in java

Question

So I\'m trying to find all the uppercase letters in a string put in by the user but I keep getting this runtime error:

Exception in thread \"main\" java.lan         


        

Answer 1

import java.util.Scanner;
class Demo
{
    public static void main(String[] args)
    {
         StringBuilder s=new StringBuilder();
         Scanner input = new Scanner(System.in);
         System.out.println("Enter your String");
         String str= input.nextLine();

         for(int i=0; i