I have been trying to convert jython scripts to .jar file. I followed,
Distributing my Python scripts as JAR files with Jython?
The link above and also the Jython wiki link shown inside it use a command line script called, "zip". Its like => zip myapp.jar Lib
and so. I am on windows machine, so I couldn't find any script as "zip" on my command line, may be its a Linux script. Help me to do it in windows machine
Second is I have few external .jar's that are used in my jython scripts, for this the above link says to use manifest. But I want to package all external jars into single myapp.jar(for example) file to be running. Just like java -jar myapp.jar, so is there any way to package external jars also?
So please help me resolve this
You can use jar command to add files to .jar archive. Just like:
jar uvf jythonlib.jar Lib
Use jar to see help with options and examples of usage.
As you can see, the code zip -r jythonlib.jar Lib and zip myapp.jar Lib/showobjs.py, just add files to a jar archive. The zip program is a specific tool to do this, but it is not the only one. On windows, I would recommend using 7-zip to create the jar. Rather than zip -r jythonlib.jar Lib, open a new 7-zip window, create a new archive (zip protocol) called jythonlib.jar and add the folder called Lib which resides in $JYHTON_HOME. Then continue with the guide and when you get to zip myapp.jar Lib/showobjs.py, simply drag and drop the file called showobjs.py into the existing 7-zip window. This should add the file to the archive.
Related
Lets say that I built a GUI Application using NetBeans. To run this java application I need to open source code in IDE and then run. I know that I can also run through command prompt.
But how do I start the application independent of IDE. Isn't there some .exe file or something like that, which on double clicking directly runs the application?
If not, how do I generate such a file?
Here you can find how to create .jar in Netbeans: How to create a Jar file in Netbeans
You can run the executable jar on every single computer, on one condition - the system have JRE installed.
If you want to, you can also build the .jar using command line, to do that use the following command:
jar cf jar-file input-file(s)
Description from Oracle doc:
The options and arguments used in this command are:
The c option indicates that you want to create a JAR file. The f
option indicates that you want the output to go to a file rather than
to stdout. jar-file is the name that you want the resulting JAR file
to have. You can use any filename for a JAR file. By convention, JAR
filenames are given a .jar extension, though this is not required. The
input-file(s) argument is a space-separated list of one or more files
that you want to include in your JAR file. The input-file(s) argument
can contain the wildcard * symbol. If any of the "input-files" are
directories, the contents of those directories are added to the JAR
archive recursively. The c and f options can appear in either order,
but there must not be any space between them.
This command will generate a compressed JAR file and place it in the
current directory. The command will also generate a default manifest
file for the JAR archive.
After you build your application look for a folder named "dist" in your project's folder. You should find there a file *.jar which can be run anywhere with double click.
STEPS TO FOLLOW:
create a jar
run the jar
Is it possible to take existing .class files and a MANIFEST.MF to create a jar file?
Is there a library that can create a "valid" jar-file? I tried it manually and it didn't work (using 7zip).
ERROR: "Invalid or corrupt jar file"
If everything has been compiled before, it should (in my understanding) theoretically work, if you create a new zip file, put all the files in it in the original structure and then rename it to "jar".
My idea is to program something like this with java code. A solution where I could add a file to an existing jar, would also be ok.
If you're interested in why I want to use this, look at my initial question: Compile javacode out of a running java accpilaction - on a system that hasn't JDK installed
Well Jar -cf
Try the jar command in $JAVA_HOME/bin
$JAVA_HOME is the path to you JRE/JDK installation
I'm not very skilled in writing batch files and/ or java. I have a folder with several .class-Files and folders in it and I want to put them all into a executable .jar-File. I know that there is a tool called "jar - The Java Archive Tool", but that just won't work for me. My folder structure looks like this:
Folder "test"
File (a.class)
Folder "subdirectory"
File (b.class)
I want a executable .jar-File called file.jar. In this .jar should now be the file a.class and the folder subdirectory with the file b.class in it.
I don't get the .jar-Tool to run and the 7zip command line doesn't support .jars (I can't even add files to it). I want this to run from a .bat-File, so I just have to open the batch-file, it creates the .jar and puts the files in it and then closes itself again.
I hope you can help me and get what I mean.
If you have issues in executing jar command, then probably you would need to check if your path has been set correctly. You can verify if the path contains jdk location ( echo %path%) from command prompt. If not you need to update. Also you can verify using Javac -verbose command to see jdk is installed.
Once you have jdk path set, you can try below command to create jar
Jar -cf myapp.jar * --> includes all files including files from sub folders.
If you want to run from batch, you would need to mention path before jar command. Ideal place for path is to configure as environment property.
Create a text file (and call it something useful like manifest.txt). In it, put the line:
Main-Class: a
(which should be called A by convention) and include a hard return at the end.
Then create the jar with:
jar cvfm file.jar manifest.txt *.class
or
jar cvfm c:\somedir\file.jar c:\somedir\mainfest.txt *
You could just put that line in a batch file called createJar.bat and run it if you only want to create files called 'file.jar'
hth
How do I convert:
class file to jar file using cmd?
class file to exe file?
jar file to exe?
Can I convert exe file to jar file?
Class files to jar files
Usage: jar {ctxu}[vfm0M][jar-file]
[manifest-file] [-C dir] files ...
Options:
-c create new archive
-t list table of contents for archive
-x extract named (or all) files from archive
-u update existing archive
-v generate verbose output on standard output
-f specify archive file name
-m include manifest information from specified manifest file
-0 store only; use no ZIP compression
-M do not create a manifest file for the entries
-i generate index information for the specified jar files
-C change to the specified directory and include the following
file If any file is a directory then it is processed recursively. The manifest file name and the archive file name needs to be specified in the same order the 'm' and 'f' flags are
specified.
Example 1: to archive two class files into an archive called classes.jar:
`jar cvf classes.jar Foo.class Bar.class`
Example 2: use an existing manifest file 'mymanifest' and archive
all the files in the foo/ directory into 'classes.jar':
jar cvfm classes.jar mymanifest -C foo/ .
Convert jar files to .exe file
1)JSmooth .exe wrapper
2)JarToExe 1.8
3)Executor
4)Advanced Installer
Convert .class to .exe is discussed in length here
You must have missed this. Please look into Java Archive (JAR) Files Guide.
And surely missed Real's How to for it Make a JAR executable There are multiple wrappers that do this work (converting Jar to exe, platform specific). You just need to search in StackOverflow for Jar exe
To convert (actually, package) .class files into .jar files, you use the jar tool. You can then generate a .exe file from the .jar using tools like Launch4j, JSmooth or several other packages (search the web for "jar exe").
If you are using Netbeans IDE, then creating .exe file from .class file won't take much time. In IDE, create a new project and put your java program in this project. Now follow these steps-
Right click the project and choose properties.
Choose run from left panel and enter the main class(in which main method is defined) in right panel.
Again right click the project and choose add library. Select swing layout extensions. Click add library.
4.Now select clean and build from run menu in your IDE. Make sure that you have already set your this project as main project.
Open the CMD and set the directory to your project. Go to "dist" > and type java -jar jarname.jar.
Your program is running in cmd now.
Open launch4j and provide the information required.
Run and enjoy your application.
Create jar file using command line. Answer in http://download.oracle.com/javase/tutorial/deployment/jar/build.html
Class to exe. Answer in http://www.javacoffeebreak.com/faq/faq0042.html
Jar to exe. Answer in http://viralpatel.net/blogs/2009/02/convert-jar-to-exe-executable-jar-file-to-exe-converting.html
Converting exe to a jar file is possible. But involves reverse engineering to discover what is in the exe, extract and do whatever you want with it. In my opinion, is not worth at all.
Is there a way to extract the source code from an executable .jar file (Java ME)?
Use JD GUI. Open the application, drag and drop your JAR file into it.
You can extract a jar file with the command :
jar xf filename.jar
References : Oracle's JAR documentation
I believe this can be done very easily. You can always extract the source files (Java files) of a jar file into a zip.
Steps to get sources of a jar file as a zip :
Download JAD from http://techieme.in/resources-needed/ and save it at any
location on your system.
Drag and drop the jar for which you want the sources on the JAD.
3 JAD UI will open with all the package structure in a tree format.
Click on File menu and select save jar sources.
It will save the sources as a zip with the same name as the jar.
Hope this helps.
The link is dead due to some reason so adding the link from where you can download the JDGUI
Your JAR may contain source and javadoc, in which case you can simply use jar xf my.jar to extract them.
Otherwise you can use a decompiler as mentioned in adarshr's answer:
Use JD GUI. Open the application, drag
and drop your JAR file into it.
I know it's an old question Still thought it would help someone
1) Go to your jar file's folder.
2) change it's extension to .zip.
3) You are good to go and can easily extract it by just double clicking it.
Note: I tested this in MAC, it works. Hopefully it will work on windows too.
Do the following on your linux box where java works (if u like the terminal way of doing things)
cd ~
mkdir decompiled_code && cd decompiled_code
// download jar procyon from https://drive.google.com/file/d/1yC2gJhmLoyE8royCph5dLEncgkNZXj58/view?usp=sharing
java -jar procyon-decompiler-0.5.36.jar /Path/to/your/jar -o .
NOTE : as #Richard commented "this may be illegal depending on whether you own the copyright to the jar, the country you live in and your purpose for doing it."
Steps to get sources of a jar file as a zip :
Download JD-GUI from http://java-decompiler.github.io/ and save it
at any location on your system.
Drag and drop the jar or open .jar file for which you want the
sources on the JD.
Java Decompiler will open with all the package structure in a tree
format.
Click on File menu and select save jar sources. It will save
the sources as a zip with the same name as the jar.
Example:-
We can use Eclipse IDE for Java EE Developers as well for update/extract code if require.
From eclipse chose Import Jar and then select jar which you need. Follow instruction as per image below
AndroChef Java Decompiler produces very good code that you can use directly in your projects...
Above tools extract the jar. Also there are certain other tools and commands to extract the jar.
But AFAIK you cant get the java code in case code has been obfuscated.
suppose your JAR file is in C:\Documents and Settings\mmeher\Desktop\jar and the JAR file name is xx.jar, then write the below two commands in command prompt:
1> cd C:\Documents and Settings\mmeher\Desktop\jar
2> jar xf xx.jar
-Covert .jar file to .zip (In windows just change the extension)
-Unzip the .zip folder
-You will get complete .java files