Java SE (Java Platform, Standard Edition)

I AM VERY NEW USER OF COMPUTER.I DECIDED TO LEARN "JAVA PROGRAMMING".AS A FIRST STEP I BOUGHT A BOOK ON JAVA "BEGINNING JAVA 2" JDK 1.3 EDITION,BY IVOR HORTON.I LEARNED THE FIRST CHAPTER,WHICH INTRODUCED ME TO THE GENERAL IDEA, THAT "WHAT IS JAVA ALL ABOUT".BEFORE STARTING 2ND CAHPTER I HAD TO INSTALL THE JDK 1.3 AS DESCRIBED IN THE BOOK.FIRST I TRIED TO DOWNLOAD THE SOFTWARE FROM THE SITE GIVEN IN IVOR HORTON'S BOOK.BUT B/C OF THE REASON THAT I LIVED IN PAKISTAN I FAILED IN THE ATTEMPTS B/C SERVICES ARE VERY SLOW HERE.EVERYTIME I RECEIVED THE MESSAGE "OPERATION TIMED OUT".THEN I ARRANGED THE INSTALLER CD.
I INSTALLED THE SOFTWARE SUCCESSFULLY BUT FOLLOWING PROBLUMS OCCURED.
I HAVE SOME QUESTIONS ALSO.ANSWERS WILL CLEAR MY PROBLUMS.
Q1)WHAT IS THE DIFFERENCE B/W SDK & JDK?IS THE REAL SOFTWARE TO INSTALL IS THE
JDK WITH DOCUMENTATIONS OR SDK IS ALSO SOMETHING TO WORK ON?
Q2)IN MY CD I HAVE JAVA 2 SDK 1.3.3 & JDK IS IN VARIOUS VERSIONS INCLUDING 1.3WHICH I HAVE TO INSTALL,IS THE VERSION B/W SDK & JDK HAVE NO CONFLICT?
Q3)I DEFINED THE PATH VERIABLE AS C:-----------;------;G:\JDK1.3\BIN B/C I INSTALLED THE
JAVA IN DRIVE G: IS THE PATH DEFINITION IS RIGHT?
Q4)TO COMPILE A SIMPLE PROGRAM TO SEE THAT THE SOFTWARE IS RUNNING,I ENTER-
ED A SIMPLE EXAMPLE FROM IVOR HORTON'S BOOK,BUT NO COMPILATION TAKES PLA
CE.EVEN NO MESSAGE TO OBSERVE,EXCEPT THE MESSAGE ON "DOS PROMPT" THAT
BAD COMMAND OR FILE NAME.WHATS WRONG HERE?
Q5)I USED THE NOTEPAD TO CREATE PROGRAM LINES,IS THIS TEXT EDITOR IS ALL RIGHT?
Q6)AFTER ENTERING PROGRAM LINES I SAVED IT IN DIRECTORY G: WHERE I INSTALLED
THE JAVA AND THEN ENTER THE COMMAND FROM MS-DOS PROMPT BUT NOTHING
TAKES PLACE MEANS NO CHANGE IS OBSERVED IN .JAVA FILE TO .CLASS FILE.
Q7)I TRIED TO ENTER THE COMMAND javac BOTH FROM C: & G: DRIVE ON DOS PROMPT,
DID I TAKE THE RIGHT ACTION?
Q8)IN README TEXT FILE I NOTICED THE VERSION NO. IN PATH VARIABLE,BUT THE JDK 1.3
SHOWS NO SUCH TYPE OF VERSION NO.IN ALL THE INSTALLED DIRECTORY,I M NOT
SURE HERE HOW TO KNOW THE VERSION NO.IS IT ONLY JDK 1.3 OR 1.3.1 OR 1.3.xxxx?
BUT I TRIED WITH ;G:\JDK1.3.1\BIN ALSO,IT DIDN'T WORK AT ALL.

I HAVE INTEL PENTIUM II WITH 350 MHZ & NEARLY 6GB FREE DISK SPACE.

ANYBODY HELP ME OR I HAVE TO LEAVE THE IDEA OF PROGRAMMING IN JAVA.

REPLY EARLY.

MY NAME IS NAWAZ & MY E-MAIL ADDRESS IS : sna_23@hotmail.com