How can I add files to a Jar file?

jar add file to specific directory
add file to jar
how to add class file to existing jar
update class file in jar
java add file to jar programmatically
how to update jar file in eclipse
jar update manifest
jar command

I want to add a series of files previously extracted from other files(already done) to a jar. These files will be overwriting files inside the JAR. What is the most efficient way to do it? I need it to be fast. Thank you!

A JAR file is a ZIP file, remember.

Just use some ZIP library.

A JAR file is a ZIP file, remember. Just use some ZIP library. Instead, you can build a WAR and then add the JAR file into the lib directory so that the classes inside the JAR file are available for use. WizToWar might help you do this. To make a ZIP file from a JAR file is as easy as renaming the file extension from .JAR to .ZIP.

jar -u file.jar file1 file2 file3 ...

How do I add a class to a jar file? Extracting the Contents of a JAR File. You can use the Jar tool to unpack a JAR file. When extracting files, the Jar tool makes copies of the desired files and writes them to the current directory, reproducing the directory structure that the files have in the archive.

jar -uf my.jar file1 file2...
jar -uf my.jar dir/

or mixed

jar -uf my.jar file dir/

How do I change a war file to a jar file? To run the file (Java Runtime Environment) Right-click the file and select Open With . In the Open With window, click the Browse button to open the File Explorer window. You need to find the Java executable file (java.exe file) on your computer hard drive. It is often located in the "Program

 zip file.jar file1 file2 file3 

works for me in Mac Os 10.7.5

The basic command for adding files has this format: jar uf jar-file input-file(s). In this command: The u option indicates that you want to update an existing JAR file​  Most JARs, no matter whether they contain an executable program or a library, require other libraries to run. Those dependencies are usually contained in JARs as well. So how can

Extending the existing answers, I find the -C jar option very useful when adding files that are on their own folder and you flatten their path out.

$ jar uf jar-file -C /path/to/my_jars/ this_useful.jar

You will end up having this_useful.jar right in the JAR's root:

$ jar tf jar-file | grep this_useful.jar
this_useful.jar

Adds files to an existing Zip file. Overwrites zip entries with the same name as one of the new files. The function renames the existing zip file to  How to Run .JAR Files on Windows 10. If the issue is with your Computer or a Laptop you should try using Reimage Plus which can scan the repositories and replace corrupt and missing files. This works in most cases, where the issue is originated due to a system corruption. You can download Reimage by clicking the Download button below. Download Now

Add to it the files and directories specified by inputfiles. u: Updates an existing file jarfile (when f is specified) by  When installing a non-Apple file on Mac, you may have to first click OK on the warning, click the Apple menu, click System Preferences, click Security & Privacy, unlock the menu, click Open Anyway next to the file's name, and then click Open when prompted before you can install the file.

jar – file : name of jar file on which you want to use jar tool. file1, file2, file3 : files which you want to add inside a jar file. manifest-file is the name of file which  Open the Windows Explorer and select ‘Folder Options’ from the ‘TOOLS’ option. Then select ‘File Types,’ and choose JAR File. Press the Advanced button and check the Edit File Type dialog box. Then open in Actions box and select Edit.

After you have named your project, click Create. You will be offered the opportunity to add files to the project. Select the first .java file you would like to add  The jar-file argument is the path and name of the JAR file whose contents you want to view. The t and f options can appear in either order, but there must not be any space between them. This command will display the JAR file's table of contents to stdout. You can optionally add the verbose option, v, to produce additional information about file

Comments
  • If you just want to throw some files in every now and then what I do on Windows 8.1 is rename the extension of the file from jar to zip. Then I can just use Windows Explorer to navigate into the file and add/delete as necessary. Set it back to jar when you're done and get yourself a beer.
  • JAR is nothing more than ZIP, so - zip -ur file.zip dir-fith-files/
  • it works for linux / mac os / windows, but you need to install it for your OS.
  • why do you want your customers to add something into JAR file? Let them specify the folder with files and read them if you need.
  • @zyngawow, if whoever is meant to use this can't handle the command line, they should be able to use whichever zip application they prefer. I'd suspect that if non-tech users are meant to fiddle with settings stored within jar/zip file in any way (CLI or GUI), they're going to complain anyway.
  • @zyngawow You can just do it with the method explained above. Why do other people have to repeat it?
  • I don't know why is this so under-voted answer. When I tried to use jar -u in bash script I had to press Ctrl + C for the script to continue (for some inexplicable reason). adding -f fixed it.