Java netbeans (Learning sites)

Are there any sites for learning Java netbeans?
For beginners?

 

Thanks, but is there any other site explaining procedural programming. This site is explaining object oriented programming involving classes, voids etc. Like for example I have to create a sum application of two numbers in netbeans.
I go in the button source code, go beneath private void.
Code:
int a= Integer.parseInt(jTextField1.getText());
int b=Integer.parseInt(jTextField2.getText());
int c=a+b;
jTextField3.setText(""+c);

Are there any sites explaining these type of codings in netbeans, this was a basic one.
See for example this site , although it gives one code only
http://www.thetrozone.com/cbse-class-12-ip-informatics-practices-java-project-practical-assignment-how-check-if-number [Broken]

 

Yeah thanks this is only what I wanted swing application.
The site you have provided discusses only one code and explains all that controls.
If you can give links showing variety of programs it would be helpful.

 

I don't want details of swing components and different types of swing components.
But some programs made out from it or code for a button in Java swing application.
Like checking if a number is palindrome or making a simple calculator or rounding off the digits,
Password checker, or finding the sum of digits of a number etc by inputting in a text field
and getting result by clicking a button.

 

Sorry for asking so much help but can you give a last one link involving basic Swing programs and basic swing components like button,label,text field,text area.
This is sure that I am wanting swing applications, thanks for interpreting it in 4th post.

 

No problem. I think I am wanting some specific programs but for their code I would ask later in some another thread or figure out myself if I would have any query. It's better to practice then only reading.