#1 does not execute, gives error

[Jim Michaels]

Java Virtual Machine Launcher:
Failed to load Main-Class manifest attribute from c:\downloads\loremipsum-1.0\loremipsum-1.0.jar

I usually use a batch file like this to build a jar:

if "%version%"=="" goto end
mkdir src
del *.jar
del *.class
del /q src\*.java
copy /y *.java src
javac -target 1.5 *.java
jar cvfe Hyper3.jar Hyper3 *.class *.java src\*.java
rem make copy of jar file into distribution directory (optional)
copy /y *.jar ..
del ..\*.zip
rem use 7-zip's command line tool to archive the directory (7-zip.org)
7z a -tzip ..\Hyper3-4D-%version%.zip *.java *.jar CHANGELOG LICENSE *.txt *.doc *.4d *.bat *.cmd *.dtd
:end
rem set version=3.15
echo. make sure you do a SET version=1.1 before you start the batch file.