"Flare" skrev d. 15-01-03 12:26 dette indlæg :
> Det ligger i min HelloWorld.java fil
>
> public class HelloWorld
> {
> public static void main(String[] args)
> {
> System.out.println("Velkommen det er idag: ");
> }
> }
>
> Jeg kan også fitn compile den men når jeg så skriver:
> java HelloWorld får jeg følgende fejlmeddelse:
> Exception in thread "main" java.lang.NoClassDefFoundError:
HelloWorld/class
>
> Jeg kan godt se at det er fordi den ikke kan finde klasserne men
hvordan
> faen fortæller jeg at mit SDK bibliotek er D:\j2sdk1.4.0_03\ ??
>
> Jeg er newbie (mit første java program) så det kan godt være at det
er et
> lidt tåbeligt spørgsmål
>
> Mvh
> Anders
>
>
Update the PATH variable
You can run the Java 2 SDK without setting the PATH variable, or you can
optionally set it as a convenience.
Should I set the PATH variable?
Set the PATH variable if you want to be able to conveniently run the
Java 2 SDK executables (javac.exe, java.exe, javadoc.exe, etc.) from any
directory without having to type the full path of the command. If you
don't set the PATH variable, you need to specify the full path to the
executable every time you run it, such as:
C:> \j2sdk1.4.0_<version number>\bin\javac MyClass.java
It's useful to set the PATH permanently so it will persist after
rebooting.
How do I set the PATH permanently?
To set the PATH permanently, add the full path of the
j2sdk1.4.0_<version number>\bin directory to the PATH variable.
Typically this full path looks something like C:\j2sdk1.4.0_<version
number>\bin. Set the PATH as follows, according to whether you are on
Microsoft Windows NT or 95/98/2000/ME.
Microsoft Windows NT, 2000, and XP - To set the PATH permanently:
Choose Start, Settings, Control Panel, and double-click System. On
Microsoft Windows NT, select the Environment tab; on Microsoft Windows
2000 select the Advanced tab and then Environment Variables. Look for
"Path" in the User Variables and System Variables. If you're not sure
where to add the path, add it to the right end of the "Path" in the User
Variables. A typical value for PATH is:
C:\j2sdk1.4.0_<version number>\bin
Capitalization doesn't matter. Click "Set", "OK" or "Apply".
The PATH can be a series of directories separated by semi-colons (;).
Microsoft Windows looks for programs in the PATH directories in order,
from left to right. You should only have one bin directory for a Java
SDK in the path at a time (those following the first are ignored), so if
one is already present, you can update it to j2sdk1.4.0_<version
number>\bin.
The new path takes effect in each new Command Prompt window you open
after setting the PATH variable.
Microsoft Windows 98 and 95 - To set the PATH permanently, open the
AUTOEXEC.BAT file and add or change the PATH statement as follows:
Start the system editor. Choose "Start", "Run" and enter sysedit, then
click OK. The system editor starts up with several windows showing. Go
to the window that is displaying AUTOEXEC.BAT
Look for the PATH statement. (If you don't have one, add one.) If you're
not sure where to add the path, add it to the right end of the PATH. For
example, in the following PATH statement, we have added the bin
directory at the right end:
PATH C:\WINDOWS;C:\WINDOWS\COMMAND;C:
\J2SDK1.4.0_<version number>\BIN
Capitalization doesn't matter. The PATH can be a series of directories
separated by semi-colons (;). Microsoft Windows searches for programs in
the PATH directories in order, from left to right. You should only have
one bin directory for a Java SDK in the path at a time (those following
the first are ignored), so if one is already present, you can update it
to j2sdk1.4.0_<version number>.
To make the path take effect in the current Command Prompt window,
execute the following:
C:> c:\autoexec.bat
To find out the current value of your PATH, to see if it took effect, at
the command prompt, type:
C:> path
Microsoft Windows ME - To set the PATH permanently:
From the start menu, choose programs, accessories, system tools, and
system information. This brings up a window titled "Microsoft Help and
Support". From here, choose the tools menu, then select the system
configuration utility. Click the environment tab, select PATH and press
the edit button. Now add the SDK to your path as described in step b
above. After you've added the location of the SDK to your PATH, save the
changes and reboot your machine when prompted.
ellers så på
http://java.sun.com/j2se/1.4/install-windows.html
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