(Java) Traverse Direct Children via FirstChild / NextSibling, or LastChild / PreviousSibling

Demonstrates some ways to iterate over direct child nodes using the FirstChild / NextSibling and LastChild / PreviousSibling methods.

The input XML, available at http://www.chilkatsoft.com/data/fruit.xml, is this:

<root>
    <fruit color="red">apple</fruit>
    <fruit color="green">pear</fruit>
    <veg color="orange">carrot</veg>
    <meat animal="cow">beef</meat>
    <xyz>
        <fruit color="blue">blueberry</fruit>
        <veg color="green">broccoli</veg>
    </xyz>
    <fruit color="purple">grape</fruit>
    <cheese color="yellow">cheddar</cheese>
</root>

 Chilkat Java Library Downloads for Windows, Linux, and MAC OS X

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    CkXml xml = new CkXml();
    CkXml child;
    CkXml nextSibling;
    CkXml prevSibling;

    boolean success;
    //  The sample input XML is available at http://www.chilkatsoft.com/data/fruit.xml
    success = xml.LoadXmlFile("fruit.xml");
    if (success != true) {
        System.out.println(xml.lastErrorText());
        return;
    }

    //  Iterate over the direct children by using FirstChild / NextSibling
    child = xml.FirstChild();
    while (!(child == null )) {
        System.out.println(child.tag() + " : "
             + child.content());
        nextSibling = child.NextSibling();

        child = nextSibling;
    }

    System.out.println("-----");

    //  Do the same, but with FirstChild2 / NextSibling2 to avoid
    //  creating so many XML object instances:
    success = xml.FirstChild2();
    while (success == true) {
        System.out.println(xml.tag() + " : "
             + xml.content());
        success = xml.NextSibling2();
    }

    //  Revert back up to the parent:
    xml.GetParent2();

    System.out.println("-----");

    //  Iterate in reverse order using LastChild / PreviousSibling
    child = xml.LastChild();
    while (!(child == null )) {
        System.out.println(child.tag() + " : "
             + child.content());
        prevSibling = child.PreviousSibling();

        child = prevSibling;
    }

    System.out.println("-----");

    //  Do the same, but with LastChild2 / PreviousSibling2 to avoid
    //  creating so many XML object instances:
    success = xml.LastChild2();
    while (success == true) {
        System.out.println(xml.tag() + " : "
             + xml.content());
        success = xml.PreviousSibling2();
    }

    //  Revert back up to the parent:
    xml.GetParent2();

  }
}