1.1. Download the Java Development Kit (JDK)

You probably already have the JDK installed, but if not, installing it should be your first step. Version 2.3 of the servlet API and version 1.2 of the JSP API require the Java 2 platform (standard or enterprise edition). If you aren’t using J2EE features like EJB or JNDI, I recommend that you use the standard edition, JDK 1.3 or 1.4.

For Solaris, Windows, and Linux, obtain JDK 1.3 at http://java.sun.com/j2se/1.3/ and JDK 1.4 at http://java.sun.com/j2se/1.4/. For other platforms, check first whether a Java 2 implementation comes preinstalled as it does with MacOS X. If not, see Sun’s list of third-party Java implementations at http://java.sun.com/cgi-bin/java-ports.cgi.