title: How to make my string a method I will call?
body: <p>Suppose I have strings.</p>
  
  <pre><code>String j = "objectName";
  String i = "methodName";
  </code></pre>
  
  <p>How can I call a method:</p>
  
  <pre><code>objectName.methodName();
  </code></pre>
  
  <p>When I only have the strings for the names? </p>