how to create jar file in java?

[sheelap]

i have a problem with java.suppose there is any java project either database,or any api how to create A JAR FILE? because i made
a project medical stores management in java & access .but i dont know how to create jar file for it
from
Shel

[JamesCherrill]

If you Googled you would very quickly find the Oracle tutorial:
http://docs.oracle.com/javase/tutorial/deployment/jar/index.html

but if you are using NetBeans or Eclipse then both those IDEs have their own tools to simplify creation of jar files

[rubberman]

Try the jar command? It is part of the java development tool set.