File Name: difference between package and interface in java .zip
The main difference between package and interface is that a package is a collection of related classes and interfaces while an interface is a collection of fields and abstract methods. Package and interface are two main concepts in Object Oriented Programming based languages such as Java. A package has a set of associated classes and interfaces. An interface has a set of fields and abstract methods. A package is a group or a collection that consist of related classes and interfaces. There are two types of packages in a programming language. They are the built-in packages and user-defined packages.
The interface is a blueprint that can be used to implement a class. The interface does not contain any concrete methods methods that have code. All the methods of an interface are abstract methods. An interface cannot be instantiated. However, classes that implement interfaces can be instantiated. Interfaces never contain instance variables but, they can contain public static final variables i.
An interface in Java is a blueprint of a class. It has static constants and abstract methods. The interface in Java is a mechanism to achieve abstraction. There can be only abstract methods in the Java interface, not method body. It is used to achieve abstraction and multiple inheritance in Java.
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Package in Java is a mechanism to encapsulate a group of classes, sub packages and interfaces. Packages are used for:. All we need to do is put related classes into packages.
Packages and Interfaces both acts as a container. The content in packages and interfaces can be used by the classes by importing and implementing it correspondingly. The basic difference between packages and interfaces is that a package contains a group of classes and interfaces whereas, an interface contains methods and fields.
Another unique feature in Java is Packages. Packages are containers for classes that are used to keep the class name space compartmentalized. By organizing the users classes into packages, their reusing to write other classes are easier. This Chapter is for getting a lesson of Interfaces and Packages.
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