(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 Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

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 = xml.LoadXmlFile("qa_data/xml/fruit.xml");
    if (success != true) {
        System.out.println(xml.lastErrorText());
        return;
        }

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

        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:
    success = xml.GetParent2();

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

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

        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:
    success = xml.GetParent2();
  }
}