Compiling

[christophe leterrier]

Re-hi

now I'm trying to compile Mark R Besonen piece of code allowing to
create folders using the macro language. Unfortunately, I get an
exception error when I try to compile this :

/** START "MakeDirectory_.java" code ** note that "mkdirs" (vs. "mkdir")
makes ** all intermediate parent directories ** even if they don't yet
exist */ import ij.*; import ij.plugin.*; import java.io.*; public class
MakeDirectory_ implements PlugIn { String DirToMake =
Macro.getOptions(); public void run(String arg) { File newDir = new
File(DirToMake); newDir.mkdirs(); } } /** END "MakeDirectory_.java" code */



with "Compile and Run" command.
The error is :

 java.lang.NullPointerException
 at java.io.File.<init>(File.java:194)
 at MakeDirectory_.run(MakeDirectory_.java:13)
 at ij.IJ.runUserPlugIn(Unknown Source)
 at ij.ImageJ.runUserPlugIn(Unknown Source)
 at ij.plugin.PlugInExecuter.run(Unknown Source)
 at java.lang.Thread.run(Thread.java:595)

I think I can't get to use the java.io class but I don't even know how
to add it to ImageJ so it can use it.

Any hint ?

Christophe

--
-- Christophe LETERRIER -------------------

Etudiant en thèse                
Equipe Dynamique des Récepteurs Neuronaux
Laboratoire de Neurobiologie
ESPCI-CNRS UMR 7637
10, rue Vauquelin 75231 Paris Cedex 05

Tel [phone]
Fax [phone]
[hidden email]

[Mark R. Besonen]

Hello Christophe,

         The java.io package is not a part of
ImageJ itself, but is part of the Sun JVM
package.  I'm not sure why you are having this
problem you have described below.  But if you
have not upgraded to the most recent JVM, you
might want to try that since this has resolved
several similar problems for me in the past.

         On another note, you might also want to
change "MakeDirectory_" to "Make_Directory".  So
the resulting run() command would become "Make
Directory" (space between words) instead of
"MakeDirectory " (space after joined words).

         If you can't get compiling to work, I
can send you a pre-compiled class file
off-list.  It is microscopic--less than 1 KB.

Mark Besonen
UMass Geosciences





At 06:43 AM 10/25/2005, you wrote:

>Re-hi
>
>now I'm trying to compile Mark R Besonen piece
>of code allowing to create folders using the
>macro language. Unfortunately, I get an
>exception error when I try to compile this :
>
>/** START "MakeDirectory_.java" code ** note
>that "mkdirs" (vs. "mkdir") makes ** all
>intermediate parent directories ** even if they
>don't yet exist */ import ij.*; import
>ij.plugin.*; import java.io.*; public class
>MakeDirectory_ implements PlugIn { String
>DirToMake = Macro.getOptions(); public void
>run(String arg) { File newDir = new
>File(DirToMake); newDir.mkdirs(); } } /** END "MakeDirectory_.java" code */
>
>
>
>with "Compile and Run" command.
>The error is :
>
>java.lang.NullPointerException
>at java.io.File.<init>(File.java:194)
>at MakeDirectory_.run(MakeDirectory_.java:13)
>at ij.IJ.runUserPlugIn(Unknown Source)
>at ij.ImageJ.runUserPlugIn(Unknown Source)
>at ij.plugin.PlugInExecuter.run(Unknown Source)
>at java.lang.Thread.run(Thread.java:595)
>
>I think I can't get to use the java.io class but
>I don't even know how to add it to ImageJ so it can use it.
>
>Any hint ?
>
>Christophe
>
>--
>-- Christophe LETERRIER -------------------
>
>Etudiant en thèse
>Equipe Dynamique des Récepteurs Neuronaux
>Laboratoire de Neurobiologie
>ESPCI-CNRS UMR 7637
>10, rue Vauquelin 75231 Paris Cedex 05
>
>Tel [phone]
>Fax [phone]
>[hidden email]