Develop Reference

How to put a java project in an exe or jar?

I want to put my java Project in a .jar or in an .exe. I can not find a solution for my problem.
That is my project structure:
project
1.1. pom.xml
1.2. .idea
1.2.1. libaries
1.2.1.1. many maven dependency files
1.3. .GUI
1.3.1. .idea
1.3.1.1. libaries
1.3.1.1.1. many maven dependency file
1.3.2. src
1.3.2.1. main
1.3.2.1.1. java
1.3.2.1.1.1. .java files
1.3.2.1.2. recources
1.3.2.1.2.1. .fxml files
1.3.2.1.2.2. CSSStylesheets
1.3.2.1.2.2. .css files
I follow instructions on youtube for creating a .jar in Intellij (https://www.youtube.com/watch?v=ZlyTn8PZ3Fc) but the .jar was not executable. It just print this Display parameters as parsed by Maven (in canonical form) and comparison result: to the console after running java -jar file.jar. (After the double dot there does not come more information.)
Next I found another youtube video that shows me it does not work like in the first video because of the maven dependencies (https://www.youtube.com/watch?v=HGHu-SzL-5E). In this video I do not know what to do in 5:39. He copies something but I do not know from where that is. I tried to put the same files in there like he did but it does not work. There comes a ClassNotFoundError that it can not be found the .fxml files. Then I do not write them in the command but all other .java files but it was the same error.
On this (https://introcs.cs.princeton.edu/java/85application/jar/jar.html) site I had my next try. I follow the instructions like this: I dreated a .mf file and put all .fxml and .java and .class files in the command but it can not be found the .class files so I put them out of the command. And then ist comes a ClassNotFoundError. It can not find the Main class. Intellij mark it in the .mf file red as well and I do not know why.
Then I follow the instructions of this (https://cwiki.apache.org/confluence/display/MAVEN/Tutorial%3A+Build+a+JAR+file+with+Maven+in+5+minutes) site but there an empty .jar file was created.
Now I do not know what I did wrong or what I miss so I hope someone can help me.

JAR files created by IntelliJ IDEA do not run

I wrote a program that spans a few classes in IntelliJ and it works fine when I was testing it in the IDE. However, whenever I follow tutorials to make my project into a .jar executable, it does not run.
The file in the out folder does not run when double-click on it and says "The Java JAR file "projectName.jar" could not be launched.
When opening it from the terminal, I get the error "Could not find or load main class". I used "$ java -jar projectName.jar "
I followed these steps:
Open Project Structure, Artifacts and click the (+).
Under JAR, from modules with dependencies.
Point to the class with my main method and click OK.
Click apply and OK to exit.
Then I close project structure and open Build and then Build Artifacts...
Then I click Build.
Navigate to ~/IdeaProjects/projectName/out/artifacts/projectName_jar/projectName.jar
Then I would try to run it but it does not run. My project has both a GUI and can be run from command lines. When I compiled the main method in Terminal, it worked fine, but I need a JAR file. I'm not sure what I should include in the question, since I'm sure that my code is unrelated. I also utilize Maven, not sure if that is related. Are there other things that I should be doing or adding to my project before I build the JAR?

This can be a result of the Manifest being created in the wrong place.
First make sure it is in src/main/resources/META-INF/MANIFEST.MF
(Intellij sometimes incorrectly places it in /src/main/java/META-INF/MANIFEST.MF)
Then Make sure the jar is looking for META-INF in the src dir NOT in /java OR /resources. This means:
When you set up File>Project Structure>Artifacts>+>JAR>From modules with dependencies... then your Directory for META-INF/MANIFEST.MF should end at src. Example:
ONLY C:\Users\User\StudioProjects\Project\src\
NOT THE PREPOPULATED C:\Users\User\StudioProjects\Project\src\main\java
If your Project Structure jar is already set up change the Manifest File path to:
C:\Users\User\StudioProjects\Project\src\META-INF\MANIFEST.MF
INSTEAD OF C:\Users\User\StudioProjects\Project\src\main\java\META-INF\MANIFEST.MF

You need to make sure that the Main-Class attribute is set. One way to check this is by opening the Jar with a Zip utility and looking for META-MF/MANIFEST.MF extract or open that file with a notepad, notepad++ or any document reader. If "Main-Class" is not in their or set to the correct main class you will received the error you have received. Seeing the IntelliJ tutorial it has a Main-Class field when setting up artifact publishing. I have included the link below to the IntelliJ page.
IntelliJ Creating an Artifact Tutorial

How to correctly build Jsoup.jar and export it to be used by Android APP

The current Jsoup release 1.7.3 has a known issue that it is using String.isEmpty() which is not supported by Android API Level 8.
I can see crash report of my app so I tried to fix this by change the source code of Jsoup and build my own jsoup.fix.jar. I test this jar with JAVA application and it worked fine on my PC.
I noticed that when I remove the original jsoup-1.7.3.jar from my project, there is errors complaining cannot find jsoup stuff, and the those errors are gone after I add the jsoup.fix.jar which seems to be good. I also check the JAVA build path and the exporting configurations, jsoup.fix.jar are all set as it should.
However, when I tried to run the APP on my Android devices, the APP crashed and saying it cannot find org.jsoup.Jsoup.
I checked the jsoup.fix.jar, opened it with JD-GUI and find the classes are all there, but I used my dex2jar to convert the classes.dex in my /bin directory, I cannot see nay org.jsoup stuff.
Just replace my jar file with the original jar will not have the same issue reproduced.
I also noticed that in my jar, the MANIFEST.MF file only have one line of content, but in the released jsoup-1.7.3.jar, the MANIFEST.MF contains a lot of content.
I am confused now, questions:
Am I doing wrong when build my own jar?
Why the APK still cannot include the jsoup pacakage even I configured it to do so?

Finally I found the reason might be the jar is exported from a JAVA project.
I have tried to create an Android project and copy the source files into it and then export another jar file, and it works!
Could anybody explain why?

Eclipse giving errors whenever I try to export to executable jar

I'm trying to export a small program that I have made in Eclipse Indigo today to an executable, however, every time I do so one of two problems occur. The program uses one resource which I was hoping to put inside of the JAR but Eclipse will not put in the executable jar no matter which option I tick when I export or which folder the resource is in - the first problem!
The second problem is that whenever I tell eclipse to "Extract required libraries into generated JAR" I receive the following error when I double click on the executable Jar:
Could not find the main class: main.Launcher. Program will exit.
I don't suppose that the second problem is too much of an issue at the minute but the first one is extremely frustrating so I would appreciate any help or advice. Thanks in advance.
(Strangely, and even more frustrating, if I go through the same process with a project I made a while ago with a previous version of Eclipse it works perfectly.)
The folder structure of the project is as follows:
In the project folder there are the following directories .settings, bin, src as default. I have put the resource, which is a png in the bin folder but I have also tried it in the src folder.

Can you give some details?
What is the structure of your eclipse project?
Of what type is the resource?
More important where in the project structure resides the resource file?
Is the folder of that resource file included as a source folder ? (seems to be a prerequiste to get exported to the jar)
Is it copied over to the bin folder when the project is built?
Many Thanks
Michael
Update:
I have built a very simple java project 1 Java class with a main method and put a sample png file in the source folder. I refreshed the project to have the png visible in the project, then I cleaned the project to have it build again, then I ran the Main class inside eclipse. This will give you a run configuration when exporting throught the wizard. Thereafter I exported the complete project as "runnable jar", selected the run configuration and selected "Copy required libraries in a sub-folder next to the generated JAR". The png was included and the Main class was found. The executable JAR could be executed.
(Environment: Eclipse Indigo R1, Ubuntu, JDK 6)
You might want to play through the complete sequence of steps I went through. Maybe eclipse just did not pick up a file or other updates.
regards, Mike

First of all, I would like to thank Mike (marksml) for being so helpful and attempting to provide a solution for my problem. Unfortunately, his answer did not work for me!
I began to look at all of my previous projects and noticed that the one I was having trouble with was the odd one out (because it was the only one that didn't work) and the factor that made it the odd one out, I found to be the JRE system library version. The project was using the JavaSE-1.7 library but when I changed it to the JavaSE-1.6 like my other projects were using it miraculously worked and exported flawlessly! I'm still curious as to why this is the case, but at least I have it working now...
With thanks and kind regards, Andy

Distributable JAR not working

I created a project in Netbeans 7.1 on my netbook which uses Windows XP. I used the Clean and Build command which created the distributable JAR file in the /dist folder. When I double clicked the file it worked.
Now I sent the entire project folder to my desktop, which uses Windows 7 Ultimate 64 bit. When I double clicked the executable JAR I got an error saying:
Could Not find or load main class myapp.jar
I checked the manifest file and it contains the main class name. Of course, it was autogenerated by Netbeans.
What is going on?

The common mistake is to forget to also take the "layout" folder. If you have used specific features of Netbeans, such as bindings, in the "dist" you have the jar but also a folder with the name "layout" in it and you must also copy it with the jar file and put it at the same target place.
In my case it was a pity having to also send this folder so I decided to stop using binding and other specific stuff and used to reprogram things by hand. Now I only send the jar and it is working.
Note that you can easily know if you have specific features.
Open Netbeans and look in your project folder. There you'll have 2 folder, "Source Packages" and "libraries". Check in libraries. If you have only the JDK it is ok. If you have other libraries listed, then there will be the supplementary folder in the dist and you will have to send it with the Jar.
Hope it helps