package is just like a headerfile in c or c++.it can contains classes , methods,interfaces,abstract classes.
N Number of classes can be used in a package.
Any number of classes can be used in a package.
Yes, you are on right track...it can include all of those and there is no restriction to number of classes in the package.
only one class at a time
Did Not Get The Answer?
Contact people of Talent-Core Java directly from here