title: Get value of unknown class field
body: <p>I have bunch of unknown classes that stored in <code>List</code>/<code>Array</code>.
  How to get the value of fields from these classes?</p>
  
  <p>What should I paste in <code>f.get()</code> ?</p>
  
  <pre><code>for(Class&lt;?&gt; cl : ClassList){
          for(Field f : cl.getFields()){
              try {
                  f.setAccessible(true);
                  writeln(f.get( &lt;WHAT TO PASTE HERE&gt; ));
              } catch (Exception e) {
                  e.printStackTrace();
              }
          }
      }
  </code></pre>