How can create jar file

So you can use them for tasks such as lossless data compression, archiving, decompression, and archive unpacking. Let us see how to create a. Syntax: jar cf jarfilename inputfiles Here, cf represents to create the file.

For example, to view the contents of our pack. Here class1, class2, etc are the classes in the package pack. The first two entries represent that there is a manifest file created and added to pack. The third entry represents the sub-directory with the name pack and the last two represent the files name in the directory pack.

Note: When we create. There can be only one manifest file in an archive, and it always has the pathname. MF This manifest file is useful to specify the information about other files which are packaged. For example, to extract the contents of our pack. Artificial Intelligence. Cloud Computing. Data Science. Angular 7. Machine Learning. Data Structures. Operating System. Computer Network. Compiler Design. Computer Organization. Discrete Mathematics.

Ethical Hacking. Computer Graphics. Software Engineering. Web Technology. Cyber Security. A jar file created with a main class manifest can be used both as a library and a runnable jar. If you use it as a library, you can edit and compile any of the classes included in the jar, and add it to your project. Then it will override the one in the jar file. You can give your manifest file any name, but it's better to use something standard, such as manifest.

Once you have a manifest and all your classes have been compiled, you need to run JDK's jar. Actually, if your manifest contains only the Main-Class directive, you can specify the main class directly on the jar. Then you do not need a separate manifest file; jar will add the required manifest to your jar file for you.