Using indexOf()

indexOf function is used to find the character in a String. It will return '-1' on failure i.e. no character found in a String else it will return the position of the character.

Example

public class example
{
    public static void main(String[] args)
    {
          String email="example@gmail.com";
          int pos=email.indexOf('@');
          if(pos!=-1)
          {
                  System.out.println("@ Special Character Found in a postion "+pos);
           }
          else
          {
                  System.out.println("@ Special Character Not Found");
          }
     }
}

Output
@ Special Character Found in a postion 7