What is nb-javac in Netbeans

Netbeans 9 installation
First is it requires support of nb-javac library which according to Netbeans is highly recommended. 
nb-javac is a library which is required when you are installing Netbeans 9. There are several reasons why this library is not included as part of the standard Netbeans install binaries. The foremost reason being Java/JDK is licensed separately from Netbeans. The details being that Netbeans is now under Apache licensing or rather Apache now owns Netbeans, however, Java/JDK license is owned by Oracle separately. Hence Apache could not bundle java/jdk with the Netbeans installation binaries. Users will have to separately download and install the java/jdk binaries, which can be done by downloading nb-javac library. Or the other option is to run Netbeans on JDK 9 or later, in other words your default JDK on the Operating System should be JDK 9 or later. In either case it is recommended to use the nb-javac library which has been tuned to work with Netbeans.

 Configure Server - Tomcat, GlassFish etc
Take care to turn off Tomcat service if it is installed as a Service. If you are using Tomcat server within Netbeans then you cannot use tomcat externally via Service, so stop it.
Download, Extract, Add to Netbeans

 Create new Application, deploy on server
Example index.html and New.jsp




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