Jython classpath question

[Alan Kennedy]

Tennessee James Leeuwenburg wrote:

> Is it
> correct that Jython can only access Java classes which are inside JAR
> archives in the JYTHON_HOME directory? 

No.

Here is an example of accessing java classes in a jar that is at some
non-jython location.

#-- Commands should be same for all platforms, 'cept maybe
'copy'->'cp'
C:\>cd temp
C:\temp>mkdir classpathtest
C:\temp>cd classpathtest
C:\temp\classpathtest>copy C:\jars\oro206\oro206.jar .
        1 file(s) copied.
C:\temp\classpathtest>set CLASSPATH=./oro206.jar;
C:\temp\classpathtest>jython
*sys-package-mgr*: processing new jar,
'C:\temp\classpathtest\oro206.jar'
Jython 2.1 on java1.4.2 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> import org.apache.oro as oro
>>> dir (oro)
['__name__', 'io', 'text', 'util']
>>>

And here is an example of compiling a java class in the local
directory, and using it from within jython.

#--- file SayHi.java starts here
public class SayHi
    {
    public SayHi()
        {
        System.out.println("Hello World!");
        }
    }
#--- file SayHi.java ends here

Save the above into SayHi.java, then compile it

C:\temp\classpathtest>javac SayHi.java
C:\temp\classpathtest>echo %CLASSPATH%
./oro206.jar;
C:\temp\classpathtest>jython
Jython 2.1 on java1.4.2 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> import SayHi
>>> newobj = SayHi()
Hello World!
>>>


> I have a working directory where all my code lives, and because my app is
> under rapid development, I would prefer to avoid creating a JAR file
> every time I want to do some Python scripting?

Examples above should show you the way.

HTH,

-- 
alan kennedy
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