Netbeans is an IDE. http://en.wikipedia.org/wiki/Integrated_development_environment
I'm not sure you can create netbeans inside of netbeans...but you can create javabeans inside of netbeans: http://wiki.netbeans.org/NetBeansJavaBeansTutorial
Go directly to the source: http://download.oracle.com/javase/tutorial/.
I also enjoy Java Passion, though it is not free: http://www.javapassion.com/portal/
Don't worry about what specific language you are learning. Concentrate on the fundamentals of Object Orienting Programming. If you get a development job you will be required to constantly learn new languages and tools anyway. I'm in the US and Java is heavily used. C++ and Python is also good...