Java Programming for Beginners

Modifying XML data

The power of the XML I/O system is that in between loading and writing our XML document, we can freely modify the Document object dom stored in memory. Also, the changes we make to the object in Java memory will then be written to our permanent XML file. So let's begin by making some changes:

1. We're going to use getElementsByTagName() to get all the owner elements in our XML document. This will return a NodeList object and we'll call it owners:

        NodeList owners = dom.getElementsByTagName("owner"); 

2. To convert the names of all of these owners to Mike, we're going to have to loop through this list. As a refresher, we can get the number of items in the list by calling the getLength() function of owners, that is, our NodeList ...