Why a variable inside a private inner class can't get value of a private variable that has value from AsynCallback method in Gwt?

I found this very weird behavior in Gwt.

Ok, I have a simple TestPresenter.java that have 2 buttons. Button 1 get data from DB and return value via Asyncallback method. Button 2 is to retrive that value from a private inner class.

private String test1;  private String test2;  private AsyncCallback<GetArticleResult> getArticleCallback=new AsyncCallback<GetArticleResult>(){  @Override          public void onFailure(Throwable caught) {              // TODO Auto-generated method stub              loadingPresenter.hide();          }            @Override          public void onSuccess(GetArticleResult result) {              test1=result.getVal();              test2="123";            }  };  private class  InlineHTMLContextMenuHandler implements ContextMenuHandler {                @Override          public void onContextMenu(ContextMenuEvent event) {              System.out.println(test1);              System.out.println(test2);          }  }

Now, i click the Button 1 first & it get Data from DB ok, then I click the button 2. Then i get the output:test1=Null; test2="123"; when debugging the test1 show real value, not null. For test1 variable, If i access it from a method normally then it will be fine but if accessing it from private inner class then I can't get its value.

What wrong? this so weird?

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