[SOLVED] UnknownHostException after the attempt of reading a XML file

UnknownHostException after the attempt of reading a XML file

I have to serialise key/values of a map to a XML file, and then deserialise them.

Map<String,Integer> map = new HashMap<>();
// ...
LinkedList<Element> l = new LinkedList<Element>();
Element root = new Element("root");
for (String str : map.keySet()) {
     l.add(new Element(str)); // key
     l.getLast().appendChild(map.get(str).toString()); // value
     root.appendChild(l.getLast());
}
Document d = new Document(root);

BufferedWriter out = new BufferedWriter(new FileWriter("data.xml"));
out.write(d.toXML());
out.close();

d = new nu.xom.Builder().build("data.xml"); // !
Elements e = d.getRootElement().getChildElements();

But when I try to read the XML file, UnknownHostException is thrown on the marked line.

Exception in thread "main" java.net.UnknownHostException: file

The XML file is created succesfully though. The formatted version looks like:

<?xml version="1.0"?>
<root>
    <through>1</through>
    <don>1</don>
    <backed>1</backed>
    <I>2</I>
    <asList>1</asList>
// ....
</root>

Could you please explain me what is the problem?

Solution

According to the doc pointed by @delephin, its better to use build(File in) version of build method, pass the File instance associated with your data.xml to your build() method, as below

 d = new nu.xom.Builder().build(new File("data.xml"));