Downloaded JDK 5.0 Update 1 but...

Hi everyone!
Im a total newbie to Java programming(or any programming for that matter).Im currently using' Sams teach yourself Java in 21 days'.It said I should download the latest version so JDK 5.0 would be it.As I dont have broadband yet got a friend to do it.The deal is it came with Netbeans which I dont have a clue about yet.
Uninstalled the netbeans version,downloaded the correct JDK 5.0.Its defnintely on my computer now but wheres the desktop icon(??) and why cant I access it(ther compiler)?I looked in 'Add and Remove Progams' section and the correct version is definitely on my pc.
Im itching to start and run my 1st program.Can someone please help me to fix this problem.
Thanks!!

I'm new to Java too, but I just downloaded and installed the Java 5.0/Netbeans bundle yesterday. In what I say below, I'm assuming you are using a Windows
PC.
Netbeans is an IDE (integrated development envirnoment) tool. It will
help you to do Java application development. It appears to me that, to
be able to make full, efficient use of Netbeans, you'll need to know a fair amount about Java first. You should have a NetBeans icon on your desktop if it installed
successfully.
To use the Java compiler and interpreter:
1) Make sure your PATH environmental varialbe is set properly. E,g, if your
J2SE was installed in the Programs Files\Java folder, you'll have to
add C:\Program Files\ Java\jdk1.5.0_01\bin to your PATH variable.
2) You'll have to cxreate a CLASSPATH variable to tell the Java VM where
your compiled (class) files are located. You can also do this via the
"java -classpath X\Y\" statement. See Sun's on-line guidance for configuring
windows PCs for more on this.
3) To compiled Java application, you'll have to open a Command Prompt and
cd to the directory where the .java source file resides. (This is how it
works for me at least.) Details on the javac command can be found in
the JDK 1.5.0 documentation.
4) You'll also run your compiled apps from the Command Prompt using the
"java -options filename" command. Details on this command can be
found in the JDK 1.5.0 documentation.
Hope this helps.

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