Export as Executable Jar File in Eclipse

Question

I just want to export a simple application in to a runnable jar or Mac OS X .app format. It is exporting fine but both don't run. The app runs without any errors in Eclipse.

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The applications loads data from Userdata.dat file. MainScreen is the Main Class.

What do you mean by *When I try either it is exporting fine but both don't run*? You need to be a bit more descriptive as to what issue is happening for us the help you — Mike Elofson, Jun 27 '14 at 21:25
I believe your questions has already been asked. http://stackoverflow.com/questions/423938/java-export-to-an-jar-file-in-eclipse Cheers :) — David Aviles, Jun 27 '14 at 21:25
@MikeElofson I've had something similar and you do not get an error message. The problem is in the JRE and the way it is installed on the OS. I am sure if he would run it in CMD it would execute. Another way around it would be making a batch file and executing it instead. — e.doroskevic, Jun 27 '14 at 21:28
@MikeElofson It is exporting the project as a runnable jar file but when I open the jar file nothing happens. Same thing happens for Mac OS X bundle — Sri Krishna Paritala, Jun 27 '14 at 21:29
@user3506498 f you want a batch file to run a jar file, make a blank file called runjava.bat (or any other name the essence lays in *.bat) with the contents: java -jar "C:\myjarfile.jar" — e.doroskevic, Jun 27 '14 at 21:33
@E.Doroskevic I ran it with Terminal It gave the following error Could not find or load main class .Users.Sri.Desktop.Messenger.jar — Sri Krishna Paritala, Jun 27 '14 at 21:36
@user3506498 you can execute batch files on Macs you have to elevate permission. Else I recommend you to look into deleting your current JRE and install it all again. — e.doroskevic, Jun 27 '14 at 21:37
to run any other class having "public static void main" in some package : ava -cp "full-path-of-your-jar" Main @user3506498 — e.doroskevic, Jun 27 '14 at 21:39
I changed my class name to Main and it worked @E.Doroskevic Thanks — Sri Krishna Paritala, Jun 27 '14 at 21:40

score 0 · Accepted Answer · edited Jun 27 '14 at 21:43

Easiest route is probably upgrading or re-installing the Java Runtime Environment (JRE).

Or this:

Open the Windows Explorer, from the Tools select 'Folder Options...'
Click the File Types tab, scroll down and select JAR File type.
Press the Advanced button.
In the Edit File Type dialog box, select open in Actions box and click Edit...
Press the Browse button and navigate to the location the Java interpreter javaw.exe.
In the Application used to perform action field, needs to display something similar to C:\Program Files\Java\j2re1.4.2_04\bin\javaw.exe" -jar "%1" % (Note: the part starting with 'javaw' must be exactly like that; the other part of the path name can vary depending on which version of Java you're using) then press the OK buttons until all the dialogs are closed. Which was taken from here

score 0 · Answer 2 · answered Aug 03 '16 at 12:17

You can try writing a basic .command file with the runnable jar in the same directory as the command file.
Just open up TextEdit and type this code: java -jar JarFileName.jar Save it as run.command and place the jar file in the same directory as run.command
(Directory meaning folder)

If you're on Windows, do the exact same thing, except instead of a command file, save it as a .bat file.

Export as Executable Jar File in Eclipse

2 Answers2