Applying program temporary fixes
Some of the Java™ topics has information that assumes you have loaded the latest levels of the IBM® Developer Kit for Java on your IBM i server. To get to the latest levels of Java on your server, load the latest Java Program Temporary Fix (PTF) group.
Java PTFs and PTFs that impact Java are periodically packaged as part of a PTF group. A PTF group consists of a list of PTFs defined for the purpose of managing those PTFs as one entity. A new level of the Java PTF group may be released several times within a calender year. It is recommended that you install the latest PTFs to upgrade to the latest level of the IBM Developer Kit for Java. See the Preventive Service Planning - PSP Web page for the Java PTF group number and latest group level that is available.