I want to convert folder to jar,
is there any command for cmd in window or good online converter to convert it?
Thanks in Advance.
a jar file is for a java program, if you need to compress a folder into a single file, try zip. You should be able to do it in windows.
https://support.microsoft.com/en-us/help/14200/windows-compress-uncompress-zip-files
You can install 7zip if you need a command line client.
Related
I want to convert my jar file to eclipse project, so that i can make changes in the existing code. Can anyone help me with this. I tried extracting jar using jar xf myjar.jar command through command prompt but it gave me only .class files and i want to generate .java files of my project through it.
I wanted to convert .java file to executable jar file,i did so in the command prompt. But everytime i double click (open) it nothing happens.
jar cf Calculate.jar Calculator.java
This is what i typed in the cmd. How to get an executable file? I use windows
That's not how it works, that way you are creating a jar archive with that .java file in it.
If you want to create the jar manually (if you want to do it one time, instead of using a build tool like ant or maven, it could have some educational value), you have to compile your .java file to a .class with javac, add it to the jar and then modify the META-INF/MANIFEST.MF manifest file to specify Calculator as value for the Main-Class attribute.
See this old guide from Sun.
I have a number of zip files located in a single folder eg:
file1.gz
file2.gz
file3.gz
file4.gz
I'm looking for a way of automatically unzipping these using a batch job to a similarly named folder structure so for example the contents of file1.gz will drop into a folder named file1.
I have been told that 7zip would address my issue but can't figure out how to go about it.
Any help is greatly appreciated.
Which OS are you using? This is something you'd do using the shell's capabilities, you could write
for A in *.gz ; do gunzip $A ; done
I'm using gunzip here, because .gz is actually gzip, But you can use the 7zip CLI tool as well, of course. If you're on Windows, then I recommend installing a real shell (the standard cmd.exe can not really be considered a shell IMHO).
I am using iexpress to make my .jar files into .exe files
for this I add the jar file(myjarfile.jar) and in run command box I type : java -jar myjarfile.jar
but after creating the .exe the cmd that is flashing says cannot find the jar file myjarfile.jar
can any body help me find what I am doing wrong
To test this, I built a simple HelloWorld.jar file (using these instructions) and tested it like so:
java -jar HelloWorld.jar
Then I made an IExpress package with it. The Install program was exactly the command I used above. This worked exactly as it should.
Two possible causes of the error:
In the IExpress wizard, there's a checkbox Store files using Long File Name inside Package. You should definitely select this option; ignore the warning that appears, as it applies to Windows 95/98. In the .sed file, this is:
UseLongFileName=1
Check that the .exe actually contains myjarfile.jar. 7-Zip will open the .exe and show you the archive contents. (IExpress .exe files are just a CAB file with a wrapper.) If the file is missing, then you'll need to check your .sed file to see what went wrong.
I have a bunch of JAR files (from a maven2 project) and maven reports some package could not be found (org.openanzo.client.jena to be exact). I want to dig into the JAR files downloaded as the result of maven dependency resolution and find what packages are thus available from these JAR files. Insights?
UPDATE: Apparently, the only good solution to inspect insides of a jar file is the "jar" utility or one can use the facilities of their IDE to do so.
jar tvf filename.jar will show you the contents of a jar file without requiring you to extract it.
But I think that maybe what you are really trying to do is find the right coordinates for the dependency that you are missing, since obviously none of the ones you have right now are supplying the package you are looking for (in other words, checking their contents is not likely to help you).
I confess that the first place I would suggest to check is Sonatype's public Nexus instance. A search for your example turns up nothing, though. Usually that means the project is not trying to get their stuff into Maven Central or other major repositories (which is okay), so you have to resort to a web search. Usually the first two sections of the package tell you where to look (openanzo.org in your case).
If you are on Linux or a Mac, you could go to the terminal at the root of the folder containing your JARs and type:
# grep -ri "org.openanzo.client.jena" *
It will return a recursive list of all JAR files that contain that package name. If it returns 0 results, then none of those JARS contain that package.
If you wanted to do a more exhaustive search, you could unJAR the JAR files. The directory structure and .class files will be organized by packages in folders.
# jar xvf filename.jar
If you are on Windows, you can unJAR a JAR file using a tool such as 7Zip.
#Carsten
you do not have to rename a .jar file to .zip. You can directly open the jar file in winzip/or other zip utility (assuming windows OS)
#ashy_32bit
try using "jar class finder" eclipse plugin from IBM. Simple plugin for finding classes (if you know the class name)
OR
as carsten suggested... set the jar files as lib files and manually look it up
OR
create a batch file called a.bat (where you have all your jar files directly under a single folder) and paste the following 4 lines
#ECHO OFF
dir /b *.jar > allJarFilesList.txt
FOR /F %%A IN (allJarFilesList.txt) DO jar -tf %%A > list_of_packages.txt
FOR %%B IN (list_of_packages.txt) DO FIND /I "com/sun" %%B
NOTE the "com/sun" in the last line.. it is hard coded, you can pass as argument as well...
I know this is very basic form and can be improved "a lot" like looking up in various sub directories.
hope this helps :-)
.jar files are just ZIP compressed archives, rename it to zip, open it with your favourite unzip programm, and traverse through the directory.
If you add the jar file to a eclipse project, you can traverse through the lib in th project explorer.
HTH
Assuming maven downloaded the jar files,the files will be loaded in to a local repository.
You could use maven browser that comes packaged with Eclipse to browse and search for artifacts in your repository.(usually in userdir/.m2/repository)
Note:You can explore your repository directly if you want. You will understand the packages that were downloaded. But I suggest using the plugin.
If you are using Intellij IDEA, each project contains a tree called External Library that allows you to search and explore your libraries.