Please, why the jar decopressing utility is contained only in the entire runtime environment from Or

977233

I only need from the user of my program to decompress (not run) the JAR file and obtain the CLASS file and two data files. These he should run with the help of java.exe. Command line is sufficient. Why it is impossible under JRE?

TPD-Opitz

Why do you want to unpack the jar at the users hard drive?

what about

java -jar hereYours.jar fqn.of.class.to.Run

?

And finally: Jar files are ordinary ZIP files after all, so any (un)zip utility will do...

bye

TPD

TPD-Opitz

Why do you want to unpack the jar at the users hard drive?

what about

java -jar hereYours.jar fqn.of.class.to.Run

?

And finally: Jar files are ordinary ZIP files after all, so any (un)zip utility will do...

bye

TPD

Unknown

I only need from the user of my program to decompress (not run) the JAR file and obtain the CLASS file and two data files. These he should run with the help of java.exe. Command line is sufficient. Why it is impossible under JRE?

Because the jar utility is only provided with the JDK. The JRE is limited to functionality for running applications.

Just provide the jar utility from the JDK to the users that need it.

Or write a simple java app for your user that uses Java functionality to access the contents of the jar file.

977233

After trying your code

java -jar hereYours.jar fqn.of.class.to.Run

I've obtained an error "no main manifest attribute".

This error is solved below

http://stackoverflow.com/questions/9689793/cant-execute-jar-file-no-main-manifest-attribute

jwenting

why any regular user would need to access the class files contained inside a jar directly is beyond me...