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i have been searching for a while to find this question, and i have certainly found this question asked before, but the answers have not worked for me.

to give a little information about what i am trying to achieve: i am trying to apply for a job that says "wow us with your cover letter and guarantee a response," so i decided to make a very very simple program that uses what little knowledge i have to interact with the person and work in my cover letter. i have a bit of the program written and realized that i do not know how to make the program run outside of eclipse. furthermore, i need to make sure that it is something that will work on another computer, which is not likely going to be a mac.

i have already tried to export as an executable jar file, which gave me a .class file. that will not open - it gives an error telling me to check the console for possible errors. i already have jre installed and jdk. i also tried downloading other apps that i was led to in my search for an answer, such as jsmooth (not realizing it is only for windows) and lingon. i'm pretty sure those are not at all what i am really looking for.

i am trying really hard to not contribute to another duplicate question, but i can't seem to find the answer i'm looking for.

another thought - i am trying to make it executable by double clicking the icon, just the same as i would expect any other application to do. i say that because i am hoping to be able to avoid going through the back door with terminal or the console, because that is something with which i have no experience.

this is one question i found that is very similar: how can I create executable file for the program written on Java?

i tried using java web start with the same lack of results. also, the writer of this question is asking for help with windows.

How can I open Java .class files in a human-readable way?

this one doesn't appear to be for a running a program, but for reading the code.

JAR file not opening on a Mac

this one is the most similar to what i am asking and the writer of the question was seeing what i am seeing in the warning, but this is from 2009 and it doesn't make sense to me.

sorry to go on like this, but i am trying to make it clear that i have tried to figure this out on my own and am running into a wall.

any help would be much appreciated!

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  • Java Tutorial: Packaging Programs in JAR Files. Commented Jul 14, 2014 at 6:23
  • I just made a class that makes it easy to enable double-click start for Java console applications, but this only works on Windows so far. It is prepared to support other systems, but I don't know the command line stuff. Maybe you can add the one line (or so) that's needed and make it work for you. If so, please tell me so that I can extend it. stackoverflow.com/a/32547250/3500521 Commented Sep 13, 2015 at 8:14

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If you have a jar file already, try to run

java -jar yourfile.jar

in the terminal from the folder the jar file is located in. If you dont have a .jar yet, try to run

jar cf insertfilenameyouwanthere.jar C:\insert\path\of\project\here

and then do the above.

EDIT: Blimey the commentor is right the second one was a windows command. The mac one should be like

jar cmf MANIFEST.MF myjarfilename *.class

where you use the class file you have to get a jar from it.

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3 Comments

You answer contains the windows-like path, while the question is very specifically stated that it is about the Mac (probably the latest model too).
@peeroverbeck what does that mean "where you use the class file you have to get a jar from it?" also, when you talk about the command, are you referring to me using the terminal? is there no way to make the icon clickable to run?
Sorry for late answer. I mean with my last line that you use the class file you already have and insert it where "*.class" is in the command. Yeah, I was talking about the terminal. I know that on Windows and Linux you can make the resulting jars clickable Icons on your Desktop by just setting the JRE as default execution program, but TBH I have no idea how this works on mac.

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