Iterator错误：java.util.NoSuchElementException

代码如下：

 String pptFileName = null;

 for (Iterator<FileUploadBean> it = filesList.iterator(); it.hasNext();) {
	if(it.next().getId().toString().equals(method)){
	 pptFileName = it.next().getFilePath();}
 String pptFileName = null;

 for (Ite