Sometimes when folks are talking about packaging some Java classes, they're talking about putting them together in a JAR file. Take a look at The Jar Files Trail of Sun's Java Tutorial for such instructions and information.
Determine the name of the package, then in each class that is to belong to that package, put in the statement: package com.mypackage; // or whatever the name is to be ahead of all import statements. When you compile your source code, use the command: javac -d . *.java to cause all of the .class files to be stored in a subdirectory beneath the working directory whose path matches the path name; in the case of my example above, if my source code were in a directory called /mycode, then the .class files would wind up in a directory called /mycode/com/mypackage. Next, use the following command jar cvf somename.jar com to bundle up, as a Java archive, all of the code in your package. Anyone wanting to use your package would have to (a) import com.mypackage.* and (b) have your jar file in their classpath. Hope this helps!