🚀 go-pugleaf

Oliver wrote:
> Hi,
> 
> i have a question concerning the location of the jar file.
> In Delphi there is the application object, and the property 
> ExeName gives the location of the exe. In Java there is no 
> application object. But i still would like to know where the jar
>  file is located.
> 
> At the moment im using the following approach:
> - my installation routine writes an environment variable (content: the path into which the installation writes the jar)
> - my program reads this environment variable 
> 
> This works, but i do not really like this approach.
> What i really would appreciate is an information from the class
>  itself (where it is located) - without any foreign info (such 
> as environment variable).
> 
> At the moment my jar file doesnt know where it is, it needs somebody else to tell him :)
> 
I'm not sure if this solves the problem but when I run the following:
     Properties prop = new Properties();
     prop = System.getProperties();
     String dir=prop.getProperty("user.dir");
     System.out.println("dir="+dir);

the "user.dir" property display where I run my program

To see all properties:
     prop.list(System.out);

Oliver wrote:
> i have a question concerning the location of the jar file.
> In Delphi there is the application object, and the property 
> ExeName gives the location of the exe. In Java there is no 
> application object. But i still would like to know where the jar
>  file is located.

String myClassName = MyClass.getName();
String myClassFileName = myClassName.replace('.', '/') + ".class";
URL whereAmI = MyClass.class.getResource(myClassFileName);

Fix any syntax errors.  I've used this general approach before, but I 
haven't actually compiled or tested the exact code shown above.

If the class is in a JAR file, this will be a JAR URL.  See the 
documentation on java.net.JarURLConnection for more details.  If the 
class file comes from somewhere else (a directory with class files, a 
network URL, etc.) then you would need to handle that differently.

-- 
Gillmer J. Derge [TeamB]

Hi

thanks a lot. This works during design time.
I will try it also for a jar file and i will have a look at 
this JAR url class.

friendly greetings

Oliver 

Hi

thanks, im just wondering what the difference would be
between your approach and the other approach using the url of
 the main class. Hmm... :)

friendly greetings

Oliver

Oliver wrote:
> Hi
> 
> thanks, im just wondering what the difference would be
> between your approach and the other approach using the url of
>  the main class. Hmm... :)
> 
> friendly greetings
> 
> Oliver

I wonder about the same thing. Please keep us posted.