java - XML DOM createchild takes Node instread of Element

Question

I am creating a XML using DOM as below using online examples,

DocumentBuilderFactory docfac= DocumentBuilderFactory.newInstance();
    DocumentBuilder docb= docFactory.newDocumentBuilder();

    Document doc = docb.newDocument();

    // root
    Element rootElement = (Element)doc.createElement("TEST");

    doc.appendChild(rootElement); //Compiler error
...

appenchild takes Node object, not Element object. I was trying to use Node but, it seems like there is no methods exposed to set attribute, therefore, I can't really use node.

Any help would be really appreciate it.

Thanks.

Answer 1

请验证您已导入的包：import org.w3c.dom.Document和import org.w3c.dom.Element;更改docfac.newDocumentBuilder()；

无需类型转换，org.w3c.dom.Element因为doc.createElement("TEST")返回的对象org.w3c.dom.Element是org.w3c.dom.Node.

org.w3c.dom.Element rootElement = doc.createElement("TEST");
doc.appendChild(rootElement)