I have developed an application and mostly it is a Swing based application. I have made the executable JAR of the whole project. Now when I click that JAR it gets executed and my project starts and the Swing window shows up as usual. But when I try to execute that same executable JAR on another system it doesn't get executed. Please advise how to solve this..!!
The reason that might be that the JRE may also not be installed on his system or the class path was not set..! Please advise how to execute the same JAR on his system too.
Are you working with eclipse? Maybe the other system doesn't have the JRE7. If this is the case, you have following possibilities:
Update the JRE on the other system
Create a new project in eclipse and select JavaSE-1.6 at "Use an execution environment JRE"
This compiles your project JRE6 compatible. However, you have to put more details to your question.
Have a look to:
http://launch4j.sourceforge.net
http://jsmooth.sourceforge.net
these wraps your jar into an executable,which makes easier to distribute your app,taking care of things as setting the classpath and installing the JVM if not present.
Your questions is missing some details.
Please, specify output that you get when running your application on your friend's machine.
Otherwise it is hard to advice something.
More details are also welcome: jdk/jre version, OS version, build scripts, etc.
Related
I wanted to try writing my own Debugger but was not able to do so yet as I cannot get Eclipse to allow me to programmatically access any classes of the Java Debug Interface (JDI). At first, I thought I may have a problem with my installed JDK (JDK 15.0.2) but a test with a manually compiled and executed file which featured some code for launching a Java-VM in debug mode showed that the installation is fine, and the problem must have something to do with Eclipse. If I navigate to the jdk.jdi JAR located in the JRE System Library submenu of the package explorer of my project I can even see all of the classes I would need (LaunchingConnector, Bootstrap, MethodEntryRequest, etc.). I recreated the project a few times already and also tinkered with some Build Path settings but to no avail. I'm kind of lost as to what I should try next, so any help is much appreciated.
EDIT:
Thanks to #nitind for providing the answer. I simply had to remove the check mark for com.sun.* in the Type Filters preference page, then everything worked like a charm.
I'm building a simple calculator app from a tutorial/class on Pluralsight (Java Fundamentals class), which starts with a Main.java file, and adds a class file later, MathEquation.java.
I created a Git repo to track my progress, and uploaded to Github: JavaFundamentalsClass. I used GitIgnore.IO to find a Java IntelliJ .gitignore file, and everything seemed to be working fine on the original PC I was using.
However, after switching over to a different PC, with a fresh install of IDEA, I cloned down the repo from Github, and found that the project would not build and/or run. I get this error:
"C:\Program Files\RedHat\java-1.8.0-openjdk-1.8.0.191-1\bin\java.exe" -Dfile.encoding=windows-1252 -jar ""
Error: Unable to access jarfile
Process finished with exit code 1
I suspect that there is something in the .gitigore file that is keeping some of the project, dependency, or build information from being saved in the repo that keeps IDEA from having all the info it needs to build and run the Main.java correctly.
Can anyone help? You should be able to download the project from the repo linked above in it's currently broken state, including the .gitignore file.
Additional Info
I wiped my repo clean and recloned and I forgot, originally it doesn't even give me the run button (it is grayed out). I had to do a procedure with "Add Configuration" from a search I did for that to show up to get the error above.
Also, I did install java from the OpenJDK, rather than oracle. I figured with Oracle cutting off commercial development maybe start the switch now as I'm learning, but maybe that's the issue (normal Java on my other PC).
It's working, but...
First thing - Intellij needs to know where Java is. It appears that if the SDK/JDK is not installed prior to Intellij, you will need to tell it where Java is after installing. Or if you use OpenJDK instead of Oracle Java SDK. You can do that at View/Open Library Settings, under Platform Settings / SDKs (select the JDK home path).
Then, after setting up Java, I am able to get everything working in Intellij IDEA if I find the Main.java file, right-click, and choose "Run main.main()". This runs the program okay, and also creates a Main configuration in the Run/Debug configuration area, and finally the "Run" button becomes available.
So I can get it working, but if I wipe all the files and clone it fresh from the remote repo, I have to go through running the Main.java file directly again to recreate the configuration.
So, this still doesn't answer my original question. Why doesn't this configuration get saved in the repo? What file is this information saved in? Is there something in the .gitignore file that is keeping this information from being saved to the repo?
Look like you have a different java version on your second machine.
First of all, check your java version
Update the configuration of your project, right now it pointing to java 1.8
https://github.com/LightCC/JavaFundamentalsClass/blob/master/.idea/misc.xml
I think it might be because of java not installed on the other PC you were trying. If it is installed just check whether the path mentioned has java executable file.
The first part is ensuring Java is setup, and that Intellij IDEA knows where Java is, per the other answers, comments, and addendums to the question.
The second part is setting up the run/debug configuration, per the "It's working but.." section of the question. This can be created automatically by right-clicking the file that has the main class to be run (usually Main()...), and selecting the "Run Main.main()" option (replacing Main and main() with the file and function which needs to be run)
The final piece is that to get the run/debug configurations to save to the repo, you either need to:
Share the workspace.xml file (i.e. make sure this is not in the .gitignore file). However, there is a lot of user-specific stuff in that file, so it should normally be excluded from the repo.
Or, edit the configuration and checkmark the "Share" box in the upper right-hand corner (just right of the "Name" field). This will put the configuration into a separate folder inside the .idea folder, which should not be excluded from the repo by .gitignore.
While making a game, i moved from programming in windows to ubuntu for better usability. that aside, when in windows, using Desktop d = Desktop.getDesktop(); and using d.open(new File("file dir.jar"); and it worked in windows. but, when using ubuntu, it opens the jar in an archive manager. so my question is, how would i open the .jar to be executed? Any help would be great! thanks in advance!
Edit: it may be possible i installed java wrong... but i did it the way i found on google. if that is the case, any correction would be great :D
I see two ways:
1) add the jar you want to run to the program classpath and run it's main method.
2) using Runtime.exec() you can run anything you want, but you may lose platform independence
The archive manager is set as the default program to open .jar files. You will have to change it in Ubuntu's settings for default programs. You can right-click on the file you want to open and select to open it with your installed Java runtime environment, in the meantime.
I'm building an Eclipse RCP application against Eclipse 3.7.1 and Java 1.6.
I'm also using Tycho to build, and have set up my RCP according to the Tycho tutorial from the EclipseCon 2011, to which I've stuck slavishly, apart from project names.
The application builds fine up until I get to Step 5 (adding a p2 repo, then adding a .product file. Well, it still builds fine, and everything is where it should be, but I cannot start the RCP by clicking on the .exe file from the repository in the workspace.
All I get is the old dreaded "The [RCP] executable launcher was unable to locate its companion shared library" error popup.
First of all I thought I might have set up the CLASS PATH incorrectly, but when I open a console and type javaw or java -version anywhere, it all works.
Also, when I go to the pluginsfolder in the p2 repository for the RCP in the workspace, and double-click on org.eclipse.equinox.launcher_1.2.0.v20110502.jar, the RCP starts, albeit without the splash screen.
This must surely mean my Java set up is correct, and it's not a class path problem?
I'm not sure where this problem might lie (I have a plugin, a feature, a product, a repository, and a parent package with the main pom), so if you let me know your suspicions where the error might come from, I'll be more than happy to post respective XML, build.properties, screenshots and what have you. Unless this is a common error with a common solution.
Many thanks in advance!
Oh yea: Windows 7 (64-bit), JDK and JRE both 64-bit as well, Eclipse EE 3.7.1 (I chose that because it contains the most plugins I'll need later by default).
UPDATE
I'm attaching my CLASS PATH Settings for reference.
User variables
CLASS PATH: C:\Program Files\Java\jdk1.6.0_30;.;
System variables
JAVA_HOME: C:\Program Files\Java\jdk1.6.0_30
Path: %JAVA_HOME%\bin;
UPDATE 2
When I let Tycho create a ZIP file in the p2 repository, and copy that from the repo to another location, unzip it and run the .exe, the application starts without problems. So I guess this query is partially solved, but I'd still be interested to hear why I wouldn't be able to start the application from the repository...
Today I came across the same issue. I guess you could find the solution here: https://bugs.eclipse.org/bugs/show_bug.cgi?id=176084
In short, the problem in my case was, that the org.eclipse.equinox.launcher_1.2.0.v20110502.jar must be unpacked in the plugins folder under the folder name: org.eclipse.equinox.launcher_1.2.0.v20110502
... hope that helps!
In my case the error The [RCP] executable launcher was unable to locate its companion shared library was because my path was too long.
Same issue I was facing from yesterday. Today, I have changed path of project(git clone) and build it and able to run RCP executable.
I think this issue was because of path too long.
I have done Android and C development in my copy of Eclipse, but have never actually done Java strictly. When I add code that compiles using "javac codename.java" to an eclipse project, eclipse gives me errors and can't recognize statements like import java.io.* . I believe this is due to a problem with my class path and I have tried adding some paths like library/system/java but have not had any success. Any ideas for a solution?
If Eclipse is having troubles with classes delivered by JDK, I would suggest checking out if it (thus - JDK) is properly installed. You may do that by going to menu Window > Preferences and started typing "jdk" in search input. It should point You to Java > Installed JREs. Check if there is proper JDK installed (if not - You may add it there).
After that try to clean Your project - menu Project > Clean....
Hope this helps, regards.
If you go into the preferences dialog and go to Java/Installed JREs, make sure those paths are correct.
In order for Eclipse to recognize source files as Java and compile them, your project has to be a Java project. Putting a .java file in a project that wasn't created via New / Java Project won't work.
Please try creating a Java project and put your .java file in it.
On os x the default location (right now anyway) is /System/Library/Java/JavaVirtualMachines/[VERSION].jdk/Contents/Home
The default location is available from /usr/libexec/java_home.
That said, I've never had any problems with eclipse not finding the jdk, usually it's all
automatic.