I want to know what means CLASSPATH?

I asked this before, but I didn't get a good answer but I think it should be easy for you to help me.
OS: Windows XP Professional
SDK: J2SE v1.3.1_03 ( installed into standard directory C:\jdk1.3.1_03 )
PATH: %SystemRoot%;%SystemRoot%\system32;%SystemRoot%\System32\Wbem;C:\jdk1.3.1_03\bin
CLASSPATH: empty
Now here's the thing I dont get:
What is CLASSPATH for? If I can leave it empty, why do I sometimes read that I have to set this and that in my CLASSPATH? Is it for Windows or does java use it for something? I know some time ago, I used an older SDK, and I had to set it to blablabla\classes.zip. I did, but I never knew why...

Yes it helps, thanks!
But do you mean with 'using' my own classes,
inheriting them? Because I have no problem writing my
classes and executing them, or using object classes I
made myself...without setting any classpath for
them...
Maybe you mean when you make a class and put it
somewhere, inherit it or implement it in a program
that you run from a different directory? Then I
should add the directory where the superclass is in my
classpath, correct? Can this class be in a jar, or
zip? Can the jvm find it then? Then I could make my
own .jar collection of reusable classes, right?
I don't know if this is how it works?
thx
-MikePerhaps this link can help you:
http://java.sun.com/products/jdk/1.2/docs/tooldocs/win32/classpath.html

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hi all - please help me with this down below is the strangest data history that i have found on spouses phone iphone 4- I am suspicious that is is jailbroke which was asked and denied doing to the phone -- becuase in january in data it said something along the lines as the battery or sim card was removed and ya ya -- anyways I want to know what the **** is it i have never seen such a thing ever and if a phone is jailbroke -- could you easier hide the amount of time you use internet on phone , can you use apps without anybody knowing can you have text chat sites that are hidden -- please help thanks so much SORRY ALL BELOW IN A SEP DISCUSSION IS WHERE I COPIED AND PASTED DATA FRM THE IPHONE WOULD NT LET ME DO IT ON HERE THX

     HI CAN SOMEONE HELP ME W THIS DATA - I NEVER SEEN SUCH A THING AND I ASKED SPOUSE IF IPHONE WAS JAILBROKE THEY SAID NO ............. ALSO WHAT CAN YOU DO W A JAILBROKE PHONE -- CAN YOU HIDE THE AMT OF TIME U R ON THE INTERNET BECAUSE DOES NOT USE THE CELLPHONES PLAN ANYLONGER AND BILL YOU -- CAN YOU HIDE APPS LIKE CHATS ETC FROM ALL OTHERS BESIDE YOUR SELF AND DOES THAT MAKE IT WHERE THERE IS NO HISTORY LEFT ON THE PHONE FROM USING APPS THAT ARE SECRETIVELY USED -- I NEED HELP PLEASE THANKS FOR YOUR TIME
Incident Identifier: 46F73E54-F26D-4A8A-AECB-ABC150A54778
CrashReporter Key:   6862972defc3a9ccf2f2656ba688398507946e4b
Hardware Model:      iPhone3,1
OS Version:          iPhone OS 6.1.3 (10B329)
Kernel Version:      Darwin Kernel Version 13.0.0: Wed Feb 13 21:36:52 PST 2013; root:xnu-2107.7.55.2.2~1/RELEASE_ARM_S5L8930X
Date:                2013-04-01 20:18:27 -0700
Time since snapshot: 45 ms
Free pages:        887
Active pages:      7802
Inactive pages:    3637
Throttled pages:   97174
Purgeable pages:   0
Wired pages:       18972
Largest process:   AppStore
Processes
     Name                    <UUID>                       rpages       recent_max       [reason]          (state)
MessagesViewServ <941381b881163a9981e0ea26f265ac20>         2902             2902         [vm]         (suspended)
            xpcd <27ba4c754cc3320fb864588368901246>          174              174         [vm]         (daemon) (idle)
        BlueTool <c7e035cd853e3196b1d7643d97324e87>          172              172         [vm]         (daemon) (idle)
           gamed <39f68f690fcf3fde822c757aa30c3c6f>         5931             5931      [highwater]     (daemon) (idle)
         deleted <65a1b98862613ec9b704cb304cec308d>          269              269         [vm]         (daemon) (idle)
        BejBlitz <b19680bc479b33ed8a4a847c0bb1f737>        22323            22323                      (suspended)
            Pool <94c63fc5884b31f896c8d12dc9dd7f55>        15056            15056                      (suspended)
AppleIDAuthAgent <b37f7a6048a33556a8230d3a759fc4ae>          216              216                      (daemon) (idle)
            geod <d180dd46c4bd3ffbb856b5eb8589a45c>          578              578                      (daemon) (idle)
        installd <117f65beb8cb38da8e0844256c65e402>          417              417                      (daemon) (idle)
   webbookmarksd <41a1bb7133063e13af5d04d5a4bed98b>          515              515                      (daemon) (idle)
coresymbolicatio <b0c9f54634443ac7a86bade85c7be91c>          139              139                      (daemon) (idle)
           timed <129ae7acc9bc3209a60ac42d49b0d89f>          450              450                      (daemon) (idle)
      Bejeweled2 <55fb9fc60f1734e7972490243afb579f>         7878             7878                      (suspended)
         assetsd <22bfe2389c9a3c3581185a82527b1f6a>         1107             1107                      (daemon) (idle)
softwareupdatese <e691b2b13ba2312fa8aab199b7343846>          437              437                      (daemon) (idle)
       accountsd <e6ceba0e6e053a3ea02d0a916903cff8>         1040             1040                      (daemon) (idle)
    Music~iphone <e0d24b3d0ea23e658456a7c26429dcd5>         1861             1861                      (suspended)
             lsd <566268cf717b335e98ddba10ca9315ab>          424              424                      (daemon) (idle)
    itunesstored <44d1bc6b3088390bb5c58d052a71f8f2>         2427             2427                      (daemon) (idle)
networkd_privile <cd5f76fd767c31428f411ecf03540546>          141              141                      (daemon) (idle)
       MobileSMS <3d75b813ead134998225651ca662356a>         2090             2090                      (background)
      MobileMail <e07ca7a7280736c7bf301451f89d1c02>         1296             1296                      (resume) (continuous)
     MobilePhone <51866c9bc9f93c9d8526e8acf9efc64c>         2268             2268                      (continuous)
             kbd <f7341c9a161a39acb5bc18ea47d6ebb7>          840              840                      (daemon)
            tccd <2778744d99a530c9a7d5e57a19b60008>          285              285                      (daemon)
        AppStore <6b48000b4ce9366db95e1e0ca1696917>        26780            26780                      (frontmost) (resume)
    mediaserverd <af72564bf8713fb8b16ee64c5ee85568>         1029             1029                      (daemon)
     dataaccessd <abc7f74d5d683d4c9a04e7ade5b1126b>         1637             1637                      (daemon)
         syslogd <da215e2d3de133bf8f52590727b9bdfe>          179              179                      (daemon)
      aosnotifyd <47126a998bb5308f9d5cbe028dc47d60>          707              707                      (daemon)
   iaptransportd <9b3cf56b4db13761bbd8ac2e0ff099be>          309              309                      (daemon)
           wifid <72eda25ccdd737a79d6cd172e9bf99a5>          522              522                      (daemon)
       locationd <137100f254373daeb894f665c413f8b0>         1394             1394                      (daemon)
     SpringBoard <bd1d77d154ef3dffbb53d89337c8a08f>         7912             7912
      backboardd <e1dc74434e0e3938b17ff0f7ad85d138>        10430            10430                      (daemon)
         imagent <2b64c6111aa63b179a15afd6a76a6696>          625              625                      (daemon)
    mediaremoted <ecae0f5d9a023c45ab885f2e02db6138>          333              333                      (daemon)
        recentsd <3e01ce59923d3b0381c36d62682b58b8>          673              673                      (daemon)
       absinthed <b5e167e1b2dc3bf9b5f704afb30aed5f>          156              156                      (daemon)
filecoordination <28ca39773e933ed2aa92c117c661d056>          238              238                      (daemon)
        SCHelper <4c6b59d5d6643784ba776dfb7e336199>          176              176                      (daemon)
       distnoted <699b8253736233b29180419f139e8c01>          190              190                      (daemon)
            apsd <5be27dc5ea5234319bc4b47380e42174>          464              464                      (daemon)
        networkd <49064febbe553338bd98051399022da4>          272              272                      (daemon)
      aggregated <c5a375854c3c31d59548ab53ea86d194>          130              130                      (daemon)
       fseventsd <3ea853cb95de3aa48972aa42637af69a>          447              447                      (daemon)
        BTServer <af0150d5085e326598edff072a23d146>          524              524                      (daemon)
       securityd <eeb8bd36f685306db25c302d7f3e18b4>          319              319                      (daemon)
         configd <b6a4d70640b63e8f82e0e9f3d6ee2bb9>          561              561                      (daemon)
       lockdownd <a123aa04ddf83a5fae8e5bc08f0b5771>          268              268                      (daemon)
   fairplayd.N90 <178af330594b392eab2c7b4499001e75>          193              193                      (daemon)
          powerd <63673a83ac9c3cf98fdc75df8ba70fd0>          231              231                      (daemon)
   mDNSResponder <1e651badfb7033a68a73a667ec480a08>          361              361                      (daemon)
UserEventAgent <7ee3410c25e4372d84e93318fe42696b>          613              613                      (daemon)
CommCenterClassi <19c784a3f93a35208de01bd47343facc>          978              978                      (daemon)
         notifyd <67a17b0c297e3785a9e09b8e72f3636a>          216              216                      (daemon)
**End**
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I I want to know what you think?

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I want to know what means CLASSPATH?

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