java -jar with cf -e not working on Java 14

Question

I'm playing around with javac + java + java -jar to get more involved with modules.

I'm using latest JDK 14.

I have this simple class:

package defaultpackage;
public class Main{
    public static final void main(final String args[]){
        System.out.println("HI WITH: "+java.util.Arrays.toString(args));
    }
}

I create the directories without problems:

javac -d . Main.java

Later on I can create the jar file playing mixing some values like this:

jar --create --file Jar.jar -e defaultpackage.Main defaultpackage
jar -cfe Jar.jar defaultpackage.Main defaultpackage
jar cfe Jar.jar defaultpackage.Main defaultpackage

They all create the jar with the class in the manifest file and I could run it with this simple command:

java -jar Jar.jar

But I could not this command to work is a slightly different of the previous perhaps this couldn't be mixed but i thought it could:

jar -cf Jar.jar -e defaultpackage.Main defaultpackage 

I'm trying to said well create the Jar.jar file with the entry point defaultpackage.Main

But states.

jar -cf Jar.jar -e defaultpackage.Main defaultpackage
-e : no such file or directory
defaultpackage.Main : no such file or directory

I have try this as well but with the same response:

jar -cf Jar.jar defaultpackage -e defaultpackage.Main 

And:

jar -cf Jar.jar -e defaultpackage/Main.class defaultpackage

But also with the same response.

How can I make this command to work? I could not mix -cf plus -e?

Answer 1

I could not mix -cf plus -e?

Correct. The options are somewhat like those of the venerable Unix tar command, but not exactly the same. You cannot use both combined letters and separate option letters.