HowDoIInnterHtml.java

public class HowDoIInnerHtml implements EntryPoint {
  @Override
  public void onModuleLoad() {
    Element body = Document.get().getBody();

    DivElement newDiv = Document.get().createDivElement();
    newDiv.setClassName("foo");
    newDiv.setInnerText("Text in the div");

    SpanElement newSpan = Document.get().createSpanElement();
    newDiv.appendChild(newSpan);

    body.appendChild(newDiv);
    //page shows "Text in the div"

    Window.alert("newDiv.innerHTML? " + newDiv.getInnerHTML() +
        "\nspan is in div? " + (newSpan.getParentElement() == newDiv));
    //alert shows "Text in the div <span></span>", true

    body.setInnerHTML("");

    Window.alert("newDiv.innerHTML? " + newDiv.getInnerHTML() +
            "\nspan is in div? " + (newSpan.getParentElement() == newDiv));
    //alert shows "", false ???

    body.appendChild(newDiv);
    //page shows blank
  }
}