Executing a Java application from command line

[Sharp Tool]

Hi

I'm trying to execute a Java program from the command line.
I have set the path environment variable to point to the following:

- C:\Program files\Java\jre1.5.0_04\bin
- C:\Documents and Settings\Desktop\Java\Test.class

And PathEXT variable to include:

..CLASS
..class
..JAVA
..java

Now when I start ->run->cmd and type at the command line:

Z:\java Test

I get the error: NoClassDefFound
Note: when I run cmd it defaults to Z:\ drive

Also, switching to:

C:\java Test

Gives the same error.

However, if I change directory to point to:
C:\Documents and Settings\Desktop\Java
and type:
C:\Documents and Settings\Desktop\Java\java Test
It works

I have also tried the classpath from C:\
For example:
C:\java -classpath C:\Documents and Settings\Desktop\Java\Test.class
Gives "and" error

WHAT AM I DOING WRONG?

Cheers
Sharp Tool

 

[TechBookReport]

I have also tried the classpath from C:\
For example:
C:\java -classpath C:\Documents and Settings\Desktop\Java\Test.class
Gives "and" error

Try enclosing the path in quotes, also the class path should be a path
(i.e. it shouldn't include the name of the class file).

 

[Sharp Tool]

Try enclosing the path in quotes, also the class path should be a path
(i.e. it shouldn't include the name of the class file).

OK, but why can't I execute the Java program from Z:\ or C:\ ?
Because I have set the environment variables correctly, and so it should
know where to look for the java.exe and the java class file.

Cheers
Sharp Tool.

 

[Thomas Hawtin]

OK, but why can't I execute the Java program from Z:\ or C:\ ?
Because I have set the environment variables correctly, and so it should
know where to look for the java.exe and the java class file.

There are two environment variable involved. PATH to pick up java.exe
the binary and CLASSPATH to pick up the class files.

Tom Hawtin

 

[Raymond DeCampo]

OK, but why can't I execute the Java program from Z:\ or C:\ ?
Because I have set the environment variables correctly, and so it should
know where to look for the java.exe and the java class file.

Not to be rude, but the short answer is because you have not set the
environment variables correctly.

First of all, the PATHEXT variable is meaningless with respect to java.

Secondly, you do not say what your CLASSPATH is set to, although from
what you describe I can intuit that it contains the current directory,
i.e. ".".

The first thing you should do is read some documentation on how to set
the CLASSPATH. One place to start is with the documentation that is
available from Sun for the JDK.

One you understand classpaths, give your program another try.

Ray

 

[Thomas Weidenfeller]

I get the error: NoClassDefFound
Note: when I run cmd it defaults to Z:\ drive
http://java.sun.com/j2se/1.5.0/docs/tooldocs/windows/classpath.html

WHAT AM I DOING WRONG?

You don't know your tools. Oh, and please don't shout at us.

/Thomas

 

[Sharp Tool]

You don't know your tools. Oh, and please don't shout at us.

/Thomas

Sorry, I didn't know uppercase means shouting.
I know how to set classpath now.
But I don't know how to set it permantely.
I don't seem to see it in the environment variables anywhere.

Sharp Tool

 

[Andrew Thompson]

....
I know how to set classpath now.
But I don't know how to set it permantely.

What does the URL that Thomas linked to say, about setting the
classpath permanently, in the last sentence of the first paragraph?