JavaAppLauncher and working directory

[Michael Hall]

On Apr 6, 2014, at 11:02 PM, Abu Abdullah <falcon.sheep at gmail.com> wrote:

> 
> Launcher.jar is just a wrapper instead of executing through the command line. it has only manifest.mf file with Main-Class: classes.myapp and other options. the classes are in a folder in the same directory.
>  
> user.dir for app bundler defaults to your user home directory. Trying to access anything off that inside your application bundle can't really be counted on.
> 
> this is my problem, I'm not able to see other folders in the same /Contents/Java. it seems the classes are executed as part of the classpath and not the working directory that it should be in. 


I believe the way this works is that any jars in the Java directory are added to classpath _but_ the Java directory itself is not classpath. The Classes directory it contains is in classpath.

For example:

set java.class.path
java.class.path=/Users/mjh/HalfPipe/HalfPipe7.app/Contents/Java/Classes:/Users/mjh/HalfPipe/HalfPipe7.app/Contents/Java/antlr-2.7.7.jar:…[Other jars in the Java directory automatically added].../Users/mjh/HalfPipe/HalfPipe7.app/Contents/Java/weka.jar

Notice Java directory itself not there. Java/Classes is there.
 So that you can access resources off of that with something like…

 			try {
  				ClassLoader cl = new java.net.URLClassLoader(new java.net.URL[0]);
  				BufferedReader rdr = new BufferedReader(new InputStreamReader(cl.getResourceAsStream("Scripts/loader.js")));
  				jsEngine.eval(rdr);
  			}
  			catch (Exception ex) { ex.printStackTrace(org.cmdline.common.Configuration.getSysOut()); }

Where Scripts/loader.js is located in the above mentioned Classes directory.
user.dir I would still suggest is not a reliable way to access application files going forward.

> i will try now with Joe suggestion to go with the new fx packager, it is certainly the way forward.

If this provides equivalent functionality and is active this would probably be the way to go. Given the time, I will look at it. Any handy OS X specific documentation links would be appreciated.
  

Michael Hall

trz nio.2 for OS X http://www195.pair.com/mik3hall/index.html#trz

HalfPipe Java 6/7 shell app http://www195.pair.com/mik3hall/index.html#halfpipe

AppConverter convert Apple jvm to openjdk apps http://www195.pair.com/mik3hall/index.html#appconverter