Java HTML / XML How to - Get number from XPath query

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Question

We would like to know how to get number from XPath query.

Answer

//from   ww  w  .  j a  va  2 s  .  c  om
import java.io.FileReader;

import javax.xml.xpath.XPath;
import javax.xml.xpath.XPathConstants;
import javax.xml.xpath.XPathFactory;

import org.xml.sax.InputSource;

public class Main {

    public static void main(String[] args) throws Exception {
        XPathFactory factory = XPathFactory.newInstance();
        XPath xPath = factory.newXPath();

        Number shows = (Number) xPath.evaluate("count(/schedule/show)",
                new InputSource(new FileReader("tds.xml")),
                XPathConstants.NUMBER);
        System.out.println("Document has " + shows.intValue() + " shows.");
    }

}

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