How to make a package and import it later

Hi folks,
this is a very basic question but it is not working to me so i will appreciate your comments.
I had programmed many classes that are going to be used in many projects so they must be part of a library. Tell me whether or not this procedure is correct ?
Compile those classes into .class files. Create a package with the jar application putting the .class files into a single file called my_utils ( .jar or .zip ?). Import the package from other projects using the import directive and storing the my_utils file in the project's library directory. Is this correct ?
Many thanks in advance
Marla.

If you want to create a package and then put the package into a jar file, first compile into .class files (in appropriate package directories), then jar all of the .class files.
Here's a link for a tutorial on packages. http://java.sun.com/docs/books/tutorial/java/interpack/packages.html
Here's a link for a jar file tutorial. http://java.sun.com/docs/books/tutorial/jar/index.html
You do not have put the .class files into a jar. Java packages are used for organizing classes, managing class name space, and controlling access to classes. Java jar files are a way to put multiple classes into a single file while compressing the content. Jar files can contain multiple packages and packages do not have to be inside of jar files.

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