args4j | small Java class library that makes it easy to parse | Parser library

args4j can't do that, I think. I wouldn't use args4j, it's.. outdated.

Try jcommander. It's the exact same idea, but unlike with args4j, you can stick the jcommander take on @Option on a List. See section 2.2 of the docs (click the link, go to 2.2. :P)

HOWEVER: Note that if I take your question literally, what you're asking is highly inadvisable!

In posix-style command line arguments, your string is parsed as:

• -i firstFile - okay, firstFile is the argument for the -i option.
• secondFile - okay, this is completely unrelated to the -i, this is a file argument.
• thirdFile - same deal.
• -o outFile - outFile is the argvalue for the -o switch.

What you presumably want, and how jcommander works, is that you'd have to write:

java -jar myprog.jar -i firstFile -i secondFile -i thirdFile -o outFile

if you really want -i firstFile secondFile thirdFile to work, that's a bit weird / non-standard, and naturally, when want nonstandard things, standard libraries are unlikely to be capable of delivering for you, so you'd have to write it all by hand. I'd advise you.. change what you want, a little, to fall in line with what people expect, and thus, gain the benefit of using a library to get it for you.

However, going further down this rabbithole of command line design, going with -i in1 -i in2 -i in3 is better, but still non idiomatic and unwieldy. The usual rule is that inputs are fielded via no-switch. The proper way to write your command line would be:

Apparently, this is not possible any more since JDK9, according to @Hans and this post.

Closed.

In the same directory (i.e. ~/eclipse-workspace/KplPlaylist/src/Lizzy/test) you should put lizzy.jar, lib/args4j.jar and classes directory containing, among other classes, the christophedelory/lizzy/AddToPlaylist.class class with the main method. This way the necessary dependencies will be loaded from the classpath defined by the -cp argument.

You can take a look at the build contents of the application on the SourceForge to get the *.jar/*.class (and other types if such are needed) files or build them yourself.

P.S.: The space in /home/chris/Μουσική/Αναστάσιμα τροπάρια should probably be escaped as it might be treated as the delimiter for the next parameter value.

The problem was I didn't copy the 'dependency-jars' folder to my machine where the jar file is located. The other machine did have this folder that's why it worked only there.