title: How to add a class to the ClassPath at runtime?
body: <p>A have a <code>jar</code> file which has a <code>main</code> method. I compile a new class and I want to add this new class to CP.</p>
  
  <pre><code>/folder
    /my_jar_file.jar
    /MyClass.class
  </code></pre>
  
  <p>How can I do that kind of thing in Java without recompiling of jar file?    </p>