Java Classpath - Simple Question

[RalphLeon]

Every year or so I do a project with java.... and every year I come
into the same problem.

I have a jar file I want to use with my application, say Foo.jar in
the "lib" directory.

My application is a jar file, say Bar.jar put together by ant.

I want to use some utility in Foo.jar

I call:
$ java -classpath .:lib/Foo.jar -jar Bar.jar

and I get a "Exception in thread "main"
java.lang.NoClassDefFoundError: " related to the class I want in
Foo...

In my main file I did a

"include Foo.*;"

and everything *compiles* just fine.... I can post specific code if it
will help.... I figure I am just forgetting something silly...

At Your Mercy,
Ralph

 

[RalphLeon]

For the love of god I just figured it out:

In the jar's manifest file add:

Class-Path: jar1-name jar2-name directory-name/jar3-name

For more info:
http://java.sun.com/docs/books/tutorial/deployment/jar/downman.html

Why is this process so confusing!?

 

[David Zimmerman]

Every year or so I do a project with java.... and every year I come
into the same problem.

I have a jar file I want to use with my application, say Foo.jar in
the "lib" directory.

My application is a jar file, say Bar.jar put together by ant.

I want to use some utility in Foo.jar

I call:
$ java -classpath .:lib/Foo.jar -jar Bar.jar

The -jar option trumps the -classpath option. The -classpath is ignored.

 

[Mike Schilling]

The -jar option trumps the -classpath option. The -classpath is
ignored.

Though no error (or even warning) saying "-classpath is not valid here" is
produced. That would make things far too straightforward.