java - JAR classpath and external jars -

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i actualy have 2 problems

i use eclipse -> export project generate jar file simple desktop (gui) program
generates jar file , ant script.

first problem: generated jar works fine when double-clicked.
when use generated ant script generate jar
myself, doesn't work. can wrong target (assuming dependencies met)

 <target name="create_run_jar">         <jar destfile="g:/dev/myproj/myproj.jar">             <manifest>                 <attribute name="main-class" value="view.myproj"/>                 <attribute name="class-path" value=". myproj_lib/grouplayout.jar"/>             </manifest>             <fileset dir="g:/dev/myproj/bin"/>         </jar>         <delete dir="g:/dev/myproj/myproj_lib"/>         <mkdir dir="g:/dev/myproj/myproj_lib"/>         <copy file="g:/dev/.metadata/.plugins/org.dyno.visual.swing/layoutext/grouplayout.jar" todir="g:/dev/myproj/myproj"/>     </target>

//nevemind
//second problem:
//when double click on auto-generated jar file program launches , works fine.
//when java myjar command-line main class not found exception..
//weird huh?

i suggest take jar files generated 2 ways, use jar command expand them temporary directories, , use diff in recursive mode compare them.

however, suspect @pace has put finger on problem; i.e. using relative paths in class-path manifest entry , liable cause problems.


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