Check for any updates to the tutorial by using the Update Center included with the Java EE 6 SDK.
Open the Services tab in NetBeans IDE and expand Servers.
Right-click the GlassFish v3 instance and select View Update Center to display the Update Tool.
Select Available Updates in the tree to display a list of updated packages.
Look for updates to the Java EE 6 Tutorial (javaee-tutorial) package.
If there is an updated version of the Tutorial , select Java EE 6 Tutorial (javaee-tutorial) and click Install.