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A package is just a mechanism for grouping
objects, it is very similar to grouping items
within a folder or directory on a file system. A class is found within a package, but this does not
have an impact on the class' behavior (review the
"package" access level for a slight exception). An interface, however, is a .java file that is used
(implemented) by another class to tell the outside
world that it conforms to a certain specification. For
example, you might have a "Runnable" interface
that has a "run()" method in it, by having a class that
is "Runnable" (implements Runnable) anyone using that class knows that it must have a "run()" method
defined. This is used when you have several
different classes that have the same interface. Interfaces have more in common with abstract
classes than they do with packages. An interface,
by definition, cannot have any implemented
methods; an abstract class, in contrast, can define
some methods and leave some methods to be
implemented by a subclass. Also, a class can implement many interfaces, but can only extend one
(abstract) class.
Answer by Sahe Alam Ansari, BCA. Nepal bhairahawa. email: mrsahealam@gmail.com
Wiki User
∙ 11y ago
Wiki User
∙ 16y agoA package is just a mechanism for grouping objects, it is very similar to grouping items within a folder or directory on a file system. A class is found within a package, but this does not have an impact on the class' behavior (review the "package" access level for a slight exception).
An interface, however, is a .java file that is used (implemented) by another class to tell the outside world that it conforms to a certain specification. For example, you might have a "Runnable" interface that has a "run()" method in it, by having a class that is "Runnable" (implements Runnable) anyone using that class knows that it must have a "run()" method defined. This is used when you have several different classes that have the same interface.
Interfaces have more in common with abstract classes than they do with packages. An interface, by definition, cannot have any implemented methods; an abstract class, in contrast, can define some methods and leave some methods to be implemented by a subclass. Also, a class can implement many interfaces, but can only extend one (abstract) class.
Wiki User
∙ 11y agoA package groups together a set of similar features, such as java.net (for networking) or java.security (for limiting user permissions). An API defines an entire suite of code that can be used to interface with a library or program, and may span multiple packages. In other words, a package is only for organization, while an API is what allows code units to cooperate with each other.
Wiki User
∙ 12y agoThey aren't similar from any aspect.
Harsh Mukati
Wiki User
∙ 12y agokai ni bhai....
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pata nhn
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