I have just installed Netbeans 8.0.2 on CentOS 6.5.
When I try to run it, I get the message
Cannot find java. Please use the --jdkhome switch
Check the setting in your user config /home/username/.netbeans/version/etc/netbeans.conf
/home/username/.netbeans/version/etc/netbeans.conf
I had the problem where I was specifying the location globally, but my user setting was overriding the global setting.
CentOS 7/Netbeans 8.1