[java programming] Re: Classpath problem (lab 1003)

Mon, 02 Mar 2009 02:36:24 -0800 

Unfortunately doesn't work for me... Unless I specify CLASSPATH
explicitly via advanced system settings. I tried everything with
command prompt, but in vain. Thank you, anyway.

On Mar 2, 1:34 am, "Sai Yelisetty" <[email protected]> wrote:
> Hello Anton!
> Please follow the below steps and test your java program:
> 1. Open notepad and write the below two lines (Assuming you have JDK at
> c:\JDK1.6):
> set CLASSPATH = .;c:\JDK1.6\lib\tools.jar;c:\JDK1.6\lib\dt.jar;%CLASSPATH%
> set PATH= c:\JDK1.6\bin;%PATH%
> 2. Save the file as "MyJavaEnv.bat" inside a directory c:\MyJava
> 3. Write a new java program ex. SayHello.java and save it inside c:\MyJava
> 4. Go to c:\MyJava and run the below steps:
>     a. MyJavaEnv.bat
>     b. javac SayHello.java
>     c. java SayHello
>
> Regards,
> Sai.
> --------------------------------------------------
> From: "Anton Shaykin" <[email protected]>
> Sent: Monday, March 02, 2009 1:02 AM
> To: "Free Java Programming Online Training Course By Sang Shin"
> <[email protected]>
> Subject: [java programming] Re: Classpath problem (lab 1003)
>
>
>
> > Thank you, that's actually what I did after nothing helped. So is
> > there no way to set classpath using only command line? As I see it
> > sets classpath only for one session, but it doesn't work even this
> > way. I mean when I type "set classpath = C:\Java Programs\Classes" it
> > seems to work, and then I type "set classpath" and it displays
> > "classpath = C:\Java Programs\Classes", and everything looks just
> > fine, but when I try "java Hello" it doesn't work! I know that it
> > works perfectly the way you described, but again, the question is "How
> > can I do the same using command line".
> > Thank you.
>
> > On Mar 1, 10:00 pm, Samuel Abiodun <[email protected]> wrote:
> >> It appears your set CLASSPATH is good for the session you ran your "java
> >> Hello" program. The following steps will set your path permanently and
> >> you'll be able to run java program from any directory of your Windows
> >> machine.
>
> >> 1. Start --> Control Panel --> System --> Advanced tab
> >> 2. Click Environment Variables
> >> 3. Select CLASSPATH and click Edit
> >> 4. In Edit System Variable Dialog box, Enter .; (dot semicolon) as the
> >> first entry in Variable Value.
> >> 5. Add complete path to jdk e.g. "C:\Program Files\JavaStuff\jdk1.6\bin"
> >> 6. Click Ok and exit
> >> 7. Launch a new command prompt
> >> 8. Test by typing "echo "CLASSPATH" you should see.; and path to your jdk
> >> 9. Running your program from any directory should be fine.
>
> >> Samuel Abiodun
>
> >> ________________________________
> >> From: Alfred H. <[email protected]>
> >> To: Free Java Programming Online Training Course By Sang Shin
> >> <[email protected]>
> >> Sent: Sunday, March 1, 2009 12:35:22 PM
> >> Subject: [java programming] Re: Classpath problem (lab 1003)
>
> >> On Mar 1, 6:48 pm, [email protected] wrote:
>
> >> > On Mar 1, 6:52 pm, Anton Shaykin <[email protected]> wrote:>
> >> > Please take a look at this picture:
> >> > > [url=http://www.freeimagehosting.net/][img]http://www.freeimagehosting.net/uploads/e152ac2528.jpg[/img][/url]
> >> > > I tried everything, but it doesn't work. And I believe I shouldn't be
> >> > > currently in "C:\Java Programs\Classes" directory to run the class,
> >> > > because if so, why setting CLASSPATH variable at all? I believe the
> >> > > only value of doing so is a possibility to run your programs, no
> >> > > matter what directory you're currently in. Am I wrong?
>
> >> > I believe so too. My Hello runs fine in another directory. Perhaps you
> >> > could specify the classpath explicitly like this:
> >> > C:\Java Programs\Sources>java -cp ..\classes Hello
>
> >> > > Another issue is that I don't see CLASSPATH in the list of
> >> > > enviromental variables, is it OK (see picture attached)?
> >> > > [url=http://www.freeimagehosting.net/][img]http://www.freeimagehosting.net/uploads/49d954a64e.jpg[/img][/url]
> >> > > Thanks for any help!
>
> >> > > On Mar 1, 6:10 am, [email protected] wrote:
>
> >> > > > I believe it has not been compiled.
>
> >> > > > On Mar 1, 5:11 am, Anton Shaykin <[email protected]> wrote:>
> >> > > > After successfully setting up classpath using
> >> > > > > set CLASSPATH = C:\Java Programs\Classes
> >> > > > > and putting .class file into that directory I still get an
> >> > > > > exception
> >> > > > > java.lang.NoClassDefFoundError
> >> > > > > What could be the possible solution?
> >> > > > > Even after typing "set CLASSPATH" I see exactly this directory
> >> > > > > displayed. And I'm positive there's a Hello.class file in it. But
>
> >> > > > You can confirm it is there at cmd by:
> >> > > > C:\Java Programs\Classes>dir
>
> >> > > > > every time I type "java Hello" I get the same error.
> >> > > > > Any help?
>
> >> I think you have to specify the class you have to run. Assume u have 2
> >> directories in your classpath and both have same file to run but with
> >> a bit different implementation. JVM has to know which file to run.
>
>

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