Need to perform simple xml value changes from my own program

I am writing a program which needs to be able to do to simple things to an xml file. The first is to be able to read in an element's content given the elements tag. The second is to be able to replace the element's content with different content. I want a library that gives me two functions such as

getContent(tags);

replaceContent(tags,newContent);

What is the best software available to do this (preferably free).

The javax.xml.parsers and org.w3c.dom libraries (in JRE 6) has several classes which allow you to parse and edit xml. Apache as well has one or two libraries which facilitate reading/writing in xml, such as Welcome to xml-commons

Quote:

---

Originally Posted by doWhile

The javax.xml.parsers and org.w3c.dom libraries (in JRE 6) has several classes which allow you to parse and edit xml. Apache as well has one or two libraries which facilitate reading/writing in xml, such as Welcome to xml-commons

---

Thanks I'll take a look.