Introduction

In this demo I have used NetBeans IDE 8.2 for debugging purpose. But you can use any java programming language compiler as per your availability..

public class Javaexcercise {
 
   public static void main(String args[]) {
      String str = "TechStudy.org";
      System.out.println(removeCharAt(str, 3));
   }
 
   public static String removeCharAt(String s, int pos) {
      return s.substring(0, pos) + s.substring(pos + 1);
 
   }
}

Result