Nodelist to arraylist<String> conversion

Question

I have extracted nodelist like, this.NodeList xml = doc.getElementsByTagName(tagName)

Now I want to convert the xml to ArrayList type, any suggestions?

Answer 1

Concerning Java

Since Java 8, you can work with IntStream and map, where nodeList is instance of NodeList :

List<String> nodeNames = IntStream.range(0, nodeList.getLength())
        .mapToObj(nodeList::item)
        .map(n -> n.getNodeName())
        .collect(Collectors.toList());

This will collect the nodes' name into a list.

For more general purpose, you can collect the Node elements and then work on it:

List<Node> nodes = IntStream.range(0, nodeList.getLength())
        .mapToObj(nodeList::item)
        .collect(Collectors.toList());

Note that since Java 10, you could also just var instead of List<Node> :

var nodes = IntStream.range(0, nodeList.getLength())
        .mapToObj(nodeList::item)
        .collect(Collectors.toList());

Answer 2

var nodeArrayList = new ArrayList(xmlNodeList.OfType<XmlNode>().ToList());