how do i create jar file of my java application

The Java Archive (JAR) file format enables you to bundle multiple files into a single archive file. Typically a JAR file contains the class files and auxiliary resources associated with applets and applications.

You can Compress multiple files into a single JAR archive. JAR files can be opened with WinZip or WinRar. In terms of Java applications, the ability to archive any number of source or class files into one single archive represents the biggest advantage - distributing one file containing hundreds of files is so much easier than distributing hundreds of files separately!

The jar utility program is run from the command line (DOS prompt or bash for example, depending on your OS). Here is how to create a compressed JAR file:

jar cf archive_name.jar files

Look at each part of that command line.

jar - The command to run the jar utility.

CF - Create a new archive with the file name specified. These two options are from this list of common 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

Multiple options can be used together. They all must appear after the "jar" command with no white space separating them.

archive_name.jar - Name of the JAR file. This can only be included if you use the 'f' option.

files - Names of all the files you want to put in the jar file. This could be just one name or a list of multiple names separated by space. Names can use pattern matching characters to match multiple files.

Example
jar CF example.jar One.java Two.java Three.java

You can find more information on

http://java.sun.com/docs/books/tutorial/deployment/jar/

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