To run a Java SAX-capable parser, you need the following installed on your computer:
A Java Software Development Kit, version 1.1 or higher.
A SAX2-compatible XML parser installed on your Java CLASSPATH.
A SAX2 distribution on your Java CLASSPATH. This would likely be included with the SAX2-compatible XML parser.
You might already have a JSDK installed. If not, you can download a JSDK from http://java.sun.com/j2se/. The URL gives you access to information about the Standard Edition of Java—j2se.
You can check if you have a JSDK installed by searching for a file named javac.exe. If javac.exe is present, you have a JSDK (formerly called a JDK) installed. Up to Java version 1.3, you might find javac.exe ...