title: Visualization of the Java classes
body: <p>I'm very new to programming and I have the following question.</p>
  
  <p>I have a class:</p>
  
  <pre><code>class HelloWorldApp {
      public static void main(String[] args) {
          System.out.println("Hello World!"); // Display the string.
      }
  }
  </code></pre>
  
  <p>I wish I could see the heaps, threads (internally &amp; externally) that this program used etc.</p>
  
  <p>Are there any tools for it?</p>