What exactly is a .jar file and how do i create one?

Question

Googlelable questions are perfectly valid if you look at the FAQ. — Egor Pavlikhin
– Egor Pavlikhin, Commented Apr 8, 2010 at 23:50
@HeavyWave: No one is saying that this question isn't valid. — Ignacio Vazquez-Abrams
– Ignacio Vazquez-Abrams, Commented Apr 8, 2010 at 23:52
If you don't know what one is, how do you know that you want to create one? — jeffora
– jeffora, Commented Apr 9, 2010 at 0:04

Egor Pavlikhin · Accepted Answer · 2010-04-09 00:11:45Z

5

According to wikipedia, JAR is an archive format used by Java to combine classes into one application or library.

It is essentially a zip archive with some additional information, such as a manifest.

To create one just use jar command inside the folder where you store your classes.

jar -cf my.jar *.class

edited Apr 9, 2010 at 0:11

answered Apr 8, 2010 at 23:52

Egor Pavlikhin

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2 Comments

David Over a year ago

i don't understand what you mean when you say to use those commands inside that folder. do i do this from the command line or do i make a program in the folder that does this or soemthing else? what do i do?

Egor Pavlikhin Over a year ago

jar is a command line tool, part of the Java, the same as java and javac commands. There is a tutorial at sun's website java.sun.com/docs/books/tutorial/deployment/jar/build.html

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