Java, business and... NetBeans ! [[ Jonathan Lermitage ]]

Here is a list of some tips and links for NetBeans. This page will be updated as often as possible :)

Tips : NetBeans start-up parameters

It is about parameters you can add to the etc/netbeans.conf properties file (located in the NetBeans installation directory), in the netbeans_default_options property. Additional parameters can be found at the NetBeans : Tuning JVM switches for performance web-page.

Warning : you've probably heard people advising to set the same value to the Xms and Xmx parameters, in order to avoid the JVM to manage the heap size (typical explanation : each time the JVM increases the heap size it must ask the OS for additional memory, which takes time). This is a bad idea ! JVMs are designed to perform optimizations according to the Xmx/Xms ratio (and some other parameters). Assign the same value to these switches is unnecessary (the only gain would be pointless for the JVM to allocate more memory, but it must be recognized that this task consumes only very limited resources and occurs infrequently). In addition, you will notice an interesting thing: since Java7 and the G1 garbage collector, the JVM will detect if you set the same value to the Xms and Xmx switches, and will replace your values by its own. The Xms = Xmx tip is definitely unnecessary when G1 is enabled ;)
Please note that it concerns Sun/Oracle HotSpot JVM only. I have not checked the behavior of Oracle JRockit JVM, nor IBM J9 JVM.

Internet connection problems ? (if you cannot download plugins, check for updates, etc)

If your Operating System uses IPv6, you can try to ask NetBeans to use IPv4 only. Add the following switch : -J-Djava.net.preferIPv4Stack=true.

How to place the status line in the menu bar

Add the following switch : -J-Dnetbeans.winsys.statusLine.in.menuBar=true.