Cannot find java. Please use the --jdkhome switch

1. Go to the netbeans installation directory
2. Find configuration file [installation-directory]/etc/netbeans.conf
3. towards the end find the line netbeans_jdkhome=...
4. comment this line line using '#'
5. now run netbeans. launcher will find jdk itself (from $JDK_HOME/$JAVA_HOME) environment variable

example:

sudo vim /usr/local/netbeans-8.2/etc/netbeans.conf

I do recommend you to change the configuration of JDK used by NetBeans in netbeans.conf config file:

netbeans_jdkhome="C:\Program Files\Java\..."