Re: Unable to execute program using the jar option.
- From: Lew <lew@xxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 29 May 2007 15:18:17 -0400
dan wrote:
Oddly I am unable to execute my jar directly (without getting an
exception); however, by specifying the class directly it runs just
fine.
If I had to guess.. it seems that it is related to my 2 system
properties .. it is behaving as if my classpath is being corrupted
when I use the -jar flag.
When run with "-jar", the "java" command ignores any external classpath and looks only in the JAR manifest for its class paths.
<http://java.sun.com/docs/books/tutorial/deployment/jar/run.html>:
The -jar flag tells the interpreter that the application is packaged in the JAR file format. You can only specify one JAR file, which must contain all the application-specific code.
and <http://java.sun.com/j2se/1.4.2/docs/tooldocs/findingclasses.html>:
The user class path is specified as ... The JAR archive specified by the -jar option, which overrides all other values. If this option is used, all user classes come from the specified archive.....
A JAR file usually contains a "manifest" -- a file which lists the contents of the JAR. The manifest can define a JAR-class-path, which further extends the class path (but only while loading classes from that JAR).
--
Lew
.
- References:
- Unable to execute program using the jar option.
- From: dan
- Re: Unable to execute program using the jar option.
- From: Knute Johnson
- Unable to execute program using the jar option.
- Prev by Date: Help in Threading when program waits for an input
- Next by Date: Re: Help in Threading when program waits for an input
- Previous by thread: Re: Unable to execute program using the jar option.
- Next by thread: Image from byte[]
- Index(es):
Relevant Pages
|
