opening an input stream to a file

[Douglas]

I'm learning struts at the moment and in one example the code for a business
class opens an input stream to a file using this code:

java.io.InputStream i =
this.getClass().getClassLoader().getResourceAsStream("UserFile");

The InputStream object is then used to load data from the file into a
java.util.Properties object.

My question is, why would someone open an input stream to a file this way?

Cheers.

 

[Frank]

I'm learning struts at the moment and in one example the code for a
business
class opens an input stream to a file using this code:

java.io.InputStream i =
this.getClass().getClassLoader().getResourceAsStream("UserFile");

The InputStream object is then used to load data from the file into a
java.util.Properties object.

My question is, why would someone open an input stream to a file this
way?

Cheers.

getResourceAsStream accounts not only that the file might be stored
naturally in the client's file system, but will also search within the
distributed .jar file for data files packaged with the program classes.

-HTH

Frank

 

[Douglas]

Ah, thanks.

But is there any diference between :

this.getClass().getClassLoader().getResourceAsStream("UserFile");

and

this.getClass().getResourceAsStream("UserFile");

I see both being used and see nothing in the documentation about using one
over the other.

Thnaks again.

 

[Oscar kind]

But is there any diference between :

this.getClass().getClassLoader().getResourceAsStream("UserFile");

and

this.getClass().getResourceAsStream("UserFile");

I see both being used and see nothing in the documentation about using one
over the other.

Class#getResourceAsStream(String) does more than
ClassLoader#getResourceAsStream(String). From the API:

This method delegates the call to its class loader, after making
these changes to the resource name: if the resource name starts
with "/", it is unchanged; otherwise, the package name is
prepended to the resource name after converting "." to "/".

 

[Douglas]

OK, thanks.

Cheers.

Class#getResourceAsStream(String) does more than
ClassLoader#getResourceAsStream(String). From the API:

This method delegates the call to its class loader, after making
these changes to the resource name: if the resource name starts
with "/", it is unchanged; otherwise, the package name is
prepended to the resource name after converting "." to "/".


--
Oscar Kind http://home.hccnet.nl/okind/
Software Developer for contact information, see website

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