java 将节点转换为给 ClassCastException 的元素
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时间：2020-10-31 06:29:42 来源:igfitidea点击:
Casting node to element giving ClassCastException
提问by nam_ph
here n2 is my NodeList, and i just want to see the first child node of my root element
这里 n2 是我的 NodeList，我只想看到我的根元素的第一个子节点
public void ClickMe(View view){
Node rootElement=n2.item(0);
NodeList child=rootElement.getChildNodes();
Node first=child.item(0);
//ClassCastException error is coming whenever i am casting first to Element.
Element nm=(Element)first;
Option q= getOption(nm,first);
Log.i(TAG,"the name is was talking about is : "+ q.getName());
}
this what logcat says
这就是 logcat 所说的
07-31 20:32:38.376: E/AndroidRuntime(2950): Caused by: java.lang.ClassCastException: org.apache.harmony.xml.dom.TextImpl cannot be cast to org.w3c.dom.Element
回答by Kumar Vivek Mitra
Try it like this....
像这样试试......
NodeList LOP = odoc.getElementsByTagName("Your_XML_Top_Element");
Node FPN =LOP.item(0);
try{
if(FPN.getNodeType() == Node.ELEMENT_NODE)
{
Element token = (Element)FPN;
NodeList oNameList1 = token.getElementsByTagName("Your_XML_Sub_Node");
Element firstNameElement = (Element)oNameList1.item(0);
NodeList textNList1 = firstNameElement.getChildNodes();
}
回答by kosa
If node is element then only cast it. Make check like below.
如果节点是元素，则只转换它。进行如下检查。
if (first.getNodeType() == Node.ELEMENT_NODE) { Element nm=(Element)first;}
