title: delete n-th character from string
body: <p>There is a String "Saya"
  I want to delete 4th character so it will be "Say"</p>
  
  <p>I already do this</p>
  
  <pre><code>String word = "Saya";
  char c = word.charAt(3);
  String delete = Character.toString(c);
  String newWord = word.replace(delete,"");
  System.out.println(newWord);
  </code></pre>
  
  <p>But the result is "Sy". It delete all character that same with 4th</p>
  
  <p>Does anyone can help me?</p>