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Difference between Packages and Interfaces in Java

Main Difference

Java is one of the world’s top rated and most in-demand modern object-oriented programming language. It is preferred by almost every big software company in the world for developing quality programs. With the advent of mobile application development and a massive increase in the drastic growth of the smartphone industry, especially the Android-based smartphone, Java has surely become center of attention worldwide. Packages and Interfaces in Java are two concepts which are often mixed together and results in utter confusion. Packages possess classes and interfaces inside it all together, whereas Interfaces in Java possess methods and fields inside it. Packages and Interfaces both have their own syntax and working accordingly.

Comparison Chart

 PackagesInterfaces
About

Packages are the groups in Java programing language that contains classes and interfaces inside them.

Interfaces are the groups in Java programming language that contains methods and fields inside them.

Syntax

package package_name;

public class class_name{

.

(body of class)

.

}

interface interface_name{

variable declaration;

method declaration;

}

Key Word

In the Java Programs, Packages are created with the keyword ‘Package’ followed by its syntax.

In the Java Programs, Interfaces are created with the keyword ‘Interface’ followed by its syntax.

Access

Any package in the Java program can be accessed and imported anywhere inside the program.

Any interface in the Java program can be accessed only by extending the previously imported interface and can only be implemented via classes.

Functionality

The basic functionality of packages is to contain, manage and categorize all the classes so that they can be used in the most efficient way for object creation in Java.

The basic functionality of Interfaces is to contain, manage and deal the all the methods and fields so that they can be used in the most efficient way for abstraction and Inheritance in Java.

 

Packages in Java

Packages are the groups in Java programing language that contains classes and interfaces inside them. Classes inside the packages are the bases on which the objects are further formed inside a java program. Being an object-oriented programming language, Java has to deal with the development of real-life objects which are accessed, passed and managed through classes. Those classes are managed by the packages. In other words, we can say that packages work as a container that keeps all the classes and interfaces inside them. Packages can be called anywhere in a java program by simply using ‘Package’ keyword. The question here arises is why do we need Packages in Java? The best answer to it is that packages help in arranging, containing and categorizing the classes so that they can be used accordingly for object creation in Java. Following Syntax must be followed in order to call a package in a Java program.

 

package package_name;

public class class_name{

.

(body of class)

.

}

The basic functionality of packages is to contain, manage and categorize all the classes so that they can be used in the most efficient way for object creation in Java. Any package in the Java program can be accessed and imported anywhere inside the program.

Interfaces in Java

Interfaces are the groups in Java programming language that contains methods and fields inside them. Packages contain interfaces whereas interfaces are responsible for handling the methods for class creation. In the Java Programs, Interfaces are created with the keyword ‘Interface’ followed by its syntax. Any interface in the Java program can be accessed only by extending the previously imported interface and can only be implemented via classes. Interfaces possess following syntax in Java:

 

interface interface_name{

variable declaration;

method declaration;

}

Inheritance is one of the key features of Object-oriented programing and in Java, it is achieved with the help of the methods and fields present inside the interfaces. The basic functionality of Interfaces is to contain, manage and deal the all the methods and fields so that they can be used in the most efficient way for abstraction and Inheritance in Java

Key Differences

  • Packages are the groups in Java programing language that contains classes and interfaces inside them.
  • Interfaces are the groups in Java programming language that contains methods and fields inside them.
  • Packages are called by using ‘Package’ keyword.
  • Packages can be imported anywhere in the program.
  • Interfaces are called by using ‘Interface’ keyword.
  • Interfaces can only be extended by previous interfaces and require a class for getting implemented.
  • Packages deals with categorization and management of classes.
  • Interfaces play a vital role in abstraction and inheritance.

 

Video Explanation

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