Ok, first off.... I'm not even sure if i have downloaded the right thing but this is the link of the version of SDK I have downloaded:

http://java.sun.com/j2ee/1.4/download.html

If that is not the right one will someone pls tell me?!

Here is the source code I made for simple writing:

public class OurFirstProgram {

    public static void main(String[] args){

        System.out.println("Krakatoa, EAST of Java??");
    }
}


If that is right, I think this next step is where i went wrong.
I saved it as OurFirstProgram.java. If that is right... then its definately the compiling. How do you compile a java program?

I'd appreciate your help!
:DIronChef:D

__________________
<b>IronChef</b> - http://www.freewebs.com/cool_recipes

First you must set the system environment,let the system know where the compiler is.
Then use the cmd.exe.

Just goto the directory where your OurFirstProgram.java saved.Then type "javac OurFirstProgram.java"in the cmd.
So it will create a file named OurFirstProgram.class in the same directory.
The type "java OurFirstProgram" in the console.

Oh right.
Now I use Jcreator Pro to compile and run my java program.
You can goto www.jcreator.com to download the latest version.
If you need you can email me.
and i'll give you the registration name and key for the Jcreator Pro.
My email address is [email protected].

I am a student from china.
And my english is very pool.
I am afraid that I can't explain it clearly to you.

In the Java world ,JVM( Java virtual Machine) is a very important component.
It allows your java codes "written once ,running everywhere!"
so **.class file just the file which the JVM can read.
And this kind of file must be created by javac.
Suppose OurFirstProgram.java is in the directory C:/

you can do like this:
C:/>set path="your bin directory"
C:/>javac OurFirstProgram.java
(after this step,you'll find that a file named OurFirstProgram.class is created)
C:/>java OurFirstProgram
(rember .class is not needed after OurFirstProgram)

Ya the above guy is correct . The name of the class file should be the same as the public class present in that file and for the same reason there cannot be more than one public classes in one file.

If you're using author Ivor Horton's beggining java book, then if you download the java jdk 5.0 version from java.com it would be appropriate for learning.

In fact ,you explained very well¡¢very clearly!