Nested structures like
<b>
 <select>
   <option value="Adelaide">Adelaide</option>
 </select>
 This is some Text.
</b>
are not preserved when reading them with
  javax.swing.JEditorPane.setPage(java.net.URL)
and subsequently writing them with
  javax.swing.JEditorPane.getText().

javax.swing.JEditorPane.getText() returns the html code as

<select>
  <option value=Adelaide>Adelaide
</select>
<b>
  This is some Text.
</b>