I've done a search and I can see that a lot of people have had the same problem as me, but none of the solutions have worked for me.
Basically I have a Java Project in Eclipse that is from my old Windows Installation. I've cleaned and rebuilt it because at first it wouldn't compile, but now I have it exported as a Runnable Jar. However, the only way I can get the application to appear is to do java -jar foo.jar in command prompt, or run it in Eclipse. If I double click the JAR in Windows Explorer nothing happens even though I know that Java is associated correctly because other Runnable Jars work.
The project only has the x86 JRE listed in it's Build Path Libraries and all the files listed appear to exist. I'm running Windows 7 HP.
Update: I'm sorry, but I just discovered that no other Runnable Jars are working either. If they are wrapped with launch4j they work though...
Edit: The Runnable Jars that I export from Eclipse do work fine on other systems and load on double click
Some registry values or file associations are probably messed up. Wiping off all of your existing JRE's and JDK's and re-installing them should fix your issue.
Alternatively you may be able to fix it by manually editing the registry value here:
HKLM > SOFTWARE > Classes > jarfile > shell > open > command
My value is
Type: REG_SZ
Data: "C:\Program Files\Java\jre8\bin\javaw.exe" -jar "%1" %*
You'd of course want that path to point to your javaw.exe, and make sure you have the additional arguments.
I was also facing the same problem while i was working with Spring tool suite.
You may use the following steps:-
Right click on project -> export -> Runnable jar file -> (Here,In library handling,there are three options,you have to choose middle one i.e package required library into generated jar.It will package external dependency also).
-In my case, my runnable jar was only executing on my environment i.e on which i have created that JAR. Initially i have selected the first option to create JAR i.e extract required libraries into required JAR.but that was not proper.
It may help you.Let me correct if i am getting wrong.
Since you are able to run the JAR running the command line, I believe your issue is related to which version of Java is set to run the file when it is double-clicked.
To find out which version is successfully running the file from the command line and set it to open JAR files by default:
Open a new command prompt window.
Run echo %path%. Among the path values, you should be able to find one pointing to the bin folder of one of the installed versions of Java. Copy this path somewhere.
Navigate to the JAR file you would like to run. Right click the JAR -> Open with -> Choose default program... -> Browse...
Browse to the path you copied in step 2. (the easiest way is to paste it into the address bar)
Double click javaw.exe.
Click OK.
You should now be able to run the JAR file. Please let me know if your problem persists.
I have made a jar with and keep it on desktop.Then,I double clicked on the jar and it working fine for me.
How I and what I have monintored: In my main class, perform some operation and at the end I add on Thread.sleep(25000); to hold the program for few moments. After every double click on the exported jar I found one new javaw.exe process added in the system process tree. I have noticed it on Task manager. and after 25000ms respective javaw.exe process ended. As my application does not cointain any GUI that's why I have not seen any GUI changes for the respective process. I'm Confident that if my application have some GUI, I will surely get the respective GUI window on every run.
Common mistakes : when we export a project from Eclipse as Runnable JAR file, it is exported with selected Eclipse launch configuration and Eclipse specific launch wrappers. Now if the configuration does not match when you are trying to run it via double-click you will not be able to see the error, If you run it from CMD then surely you will get the error log.
To create standard executable JAR file : To create a standard executable JAR file, you can export as JAR file and specify the main class in last screen of the wizard.
That's working for me fine. I used the same jar from different system and keeping it different location.
Related
I was able to run the JAR file inside IntelliJ when I do Shift + f10.
However when trying to execute the JAR file from my directory, nothing happens. My META-INF is place as followed here: https://stackoverflow.com/a/49147689/12973878.
This is my JAR structure
JAR structure
File structure Image
Image
Can I know what is the problem here?
Based on the description, I assume you're in a windows environment. Try to run it in terminal. Change the current directory to the location of the file and the terminal command you need to give is:
java -jar <jarfilename>
Some suggestions:
Use the -verbose:class option when starting the java application to determine if classes are loaded from the correct places.
See if there's additional settings in the run configuration of IntelliJ. You'll find it in the upper right corner of the editor window next to the executuin button - dropdown will show 'Edit Configurations'.
If there's really no error at all - are you sure you have the correct starting Class as entry point? You might simply be executing the wrong main method from terminal while
IntelliJ picks the correct one (look for "main class" in run configuration).
After running a build for the project (or a mvn package) your jar is placed in <your_project_path>/target.
There you will find: <your_project_name>-0.0.1-SNAPSHOT.jar. Now just open command prompt (on win) / terminal (on mac).
Go to the project path
cd <your_project_path>/target
and run
java -jar <your_project_name>-0.0.1-SNAPSHOT.jar
Don't forget to check that you have java path in your system $PATH
run to verify
java -version
I'm new to Java11/all the overcomplicated module stuff.
The Problem
So I exported my Java11/JavaFX11 program from Eclipse as a Runnable JAR. If I click the JAR, it runs perfectly fine (Eclipse includes all of the module settings and JavaFX itself automatically in the runnable JAR). However, if I try to bundle the JAR with a JRE and run it via the command line with the following BAT file:
#ECHO OFF
%~dp0\jre\bin\java -jar javaprogram.jar
pause
I get:
Error: JavaFX runtime components are missing, and are required to run this application
Press any key to continue . . .
How can I get it to just run the JAR file like it does when I click it?
Ways I've tried to fix it
The weirdest part is, if I just use:
java -jar javaprogram.jar
Which just accesses the installed JRE, it works again. It's only when I'm directly pointing it to a JRE at a specific path that it appears to break.
Alternatively, I'd just bundle JavaFX beside the JRE, but there doesn't seem to be a way to call --module-path with a relative path (googling this nets me a bunch of entirely unrelated stuff). It seems to demand an exact path, which isn't going to work if people are downloading a zip archive and extracting it. This would be redundant though because Eclipse is already packaging JavaFX with the JAR. I don't know why it's getting confused just because I'm calling it from the command line.
The project's code
The project I'm trying to get this to work with happens to be open source, so you can check out the code for it here:
https://github.com/SkyAphid/JDialogue
The main class is JDialogueCore.
Closing
I don't want to use installers since I think that's too bloaty. I'd like to be able to deploy my software like I always have by just putting them in an archive you can extract and run.
It's difficult to simply Google the problems as well since I keep getting completely unrelated results due to the broadness of the topic. Any direction/documentation relating to this problem would be greatly appreciated.
Thank you for your time!
While Java 8, 9, and 10 allowed a JavaFX Application subclass to act as a main class for program startup, that is no longer the case as of Java 11. Placing your public static void main method in a different class and making that class the main class solves the problem. (Source: https://github.com/javafxports/openjdk-jfx/issues/236)
Your command line invocation needs to specify both the location of the JavaFX jar files, and the location of JavaFX native libraries. Normally these are the same location in the JavaFX SDK, but they must be specified in different ways: the jar files go in the classpath or module path, while the native libraries’ location must be specified in a system property:
cd /d %~dp0
jre\bin\java -cp javaprogram.jar;javafx-sdk-11\lib -Djava.library.path=javafx-sdk-11\lib com.example.MyNonApplicationClass
If you define a module-info.java in your program, your .jar is a modular .jar, and you can benefit from the additional security of modules:
cd /d %~dp0
jre\bin\java --module-path javaprogram.jar;javafx-sdk-11\lib -Djava.library.path=javafx-sdk-11\lib -m com.example.myapp/com.example.MyNonApplicationClass
If your modular .jar file has a main class defined, you can omit the class name:
cd /d %~dp0
jre\bin\java --module-path javaprogram.jar;javafx-sdk-11\lib -Djava.library.path=javafx-sdk-11\lib -m com.example.myapp
Notice that relative paths work just fine with --module-path. Relative paths use the current directory as a base. The current directory is not changed merely by putting %~dp0 in front of the invocation of Java. The current directory is a property of the command line or script actively running, and can only be changed with commands like cd or pushd.
I've run .jar files before, but I've encountered a "different" situation, and I'm not sure what to do. I'd appreciate if someone could help me out.
Previously, I programmed with Java 6 and Eclipse Juno exported all my programs to runnable jar files. I'd get a .jar file that I could run by just double clicking on it. The files always looked something like this (note the jar file icon):
Recently, I wrote a program in Java 8 with Eclipse Luna (Release 4.4.0) and exported it to a runnable jar file, and I got something different (note the different file icon):
It no longer runs when I double click it. Instead, my computer uncompresses the jar, as it would a zip file. I tried running it from terminal. I cd'd to the directory and typed
java -jar graph3D.jar
I got the following error message:
Error: Unable to access jarfile graph3D.jar
After uncompressing the jar file, I found a folder named META-INF with the manifest file, MANIFEST.MF in it. It was the only file that seemed to resemble an executable file. Do I have to do something with that?
Could someone explain how I can run the second jar file graph3D.jar? Is it something new with Java 8, or something different about Eclipse Luna, or something else?
(Both programs run fine in Eclipse, by the way)
Thanks for your time and help.
Edit:
Below was the dialog box Eclipse displayed if anyone is interested.
Selecting "Use .jar;.zip" makes the filename "graph3D.jar;.jar;*.zip" .
Selecting "Use .zip" makes the filename "graph3D.jar;*.zip"
Selecting "Cancel" doesn't let you go forward.
You'd have to manually delete the extra file extension.
Somehow when you exported the file, the filters for the file dialog box (*.jar;*.zip) got attached to the filename, which is graph3D.jar;*.jar;*.zip, not graph3D.jar. Java can't find it because it doesn't have the name you supplied. Rename the file and pay close attention next time you export; either you fat-fingered something, or you're triggering a significant bug that needs fixing.
I recommend that you will access the build folder after you've built your project on the IDE under your project folder (in your workspace) and copy both the libraries folder and the .jar and post them wherever you want the program to be "installed", you'll then have an executable jar that should run smoothly without problems, just as I said don't forget the lib folder.
I think there is nothing new in Java 8 related with the running jar, I guess you need to check the the Eclipse export issues, it seems your classes are missing from your second jar file.
I already read many questions it the same subject, but none solved my problem..
I know that I can easly launch my app using this command on console java -jar myappname.jar
But what I want is to click on my .jar file exported by eclipse and it launches console with my app inside, do u understand?
I done the export using this configs :
File>Export>Jar File
Selected all the classes of my project
Selected "Export generated class files and resources"
Selected "Export java source files and resources"
Selected "Compress the contents of the Jar File"
Pressed Next
Selected "Export class files with compile errors"
Selected "Export class files with compile warnings"
Pressed Next
Selected "Generate the manifest file"
Selected Seal the Jar
And on "Select the class of the Application entry point:"
I choose my class where is the void main method .
the jar appears on my desktop, but then, when I double click it doesnt launch the console. why??
Thanks in advance!!
Launching a jar by double-clicking the file (or shortcut) will not display a terminal. One workaround is to change the default execute action in your operating system for .jar files to open a terminal and execute the command from within the terminal. A script like the following might do the trick (using Bash):
#!/bin/sh
/usr/bin/gnome-terminal -x java -jar $*
sleep 3
Then right-click on the jar file and choose the script as the default program to run for that file type.
Disclaimer: the above script actually fails for me. It works fine if the command being run in the terminal is "top", so it looks like you may need to tweak this a bit.
It depends on your OS.
If you use Windows, you can create .bat or .exe files. You can find 'how-to-create' tutorials on the internet.
If you use Unix based OS, you can just set the jar to be the executable.
A third party OS probaly has it's own way to set to executable.
This is the only way I am aware of.
I've been using Eclipse as my Java IDE and today I ran into an interesting problem. I used the built in file>export>runnable jar file to create a jar file for one of my programs. It runs perfectly if I start it from the command line/with a batch file, but doesn't run from a double click. I made absolutely certain that .jar files are associated with javaw and it still didn't work. It isn't a huge problem I absolutely NEED fixed, but if anyone has any ideas I'd love to hear them.
Update: I tried using Aram Kocharyan's solution (see answer below). No luck. It seems to be just this one .jar file too. All other jars launch with a double click. Rebuilding the jar doesn't help. :P
I wrote a short guide on this a while back you might find helpful:
http://ak.net84.net/projects/how-to-make-a-multi-platform-executable-java-jar-file/
This will work on double click in windows without setting any additional settings, and I've tested it with the Jar Launcher on Mac and it doesn't complain.
open your jar with..javaw
which is in bin folder of jre... in my computer it is #
C:\Program Files\Java\jre\bin\javaw.exe
Put this inside a .bat:
start javaw -classpath "%~dp0YOU-JAR-NAME.jar" -Djava.library.path="native" foo.package.bar.YourClassWithMainMethod
the option -Djava.library.path="native" its not required for run, i include this because one reason for using a .bat instead do a double click on a .jar is to use JVM-parameters, in my case i need this parameter for my project run.
the %~dp0 part get current directory