Half of the programming world love java language. Java is an open-source with enormous features that make java convenient. Java is platform-independent, which gave rise to the concept ‘wora’ means one’s you’ve written your application, it can run across any device or machine. Out of all the features, java provides the programmer’s the concept of packages.
What are Packages?
Packages are an assemblage of classes, subpackages and interfaces categorized in divergent directories according to their functionality, usability, and the categories the files should belong to.
For example:
Files in the java.io package do activities related to the input-output operation. But files in java.net deal with networking. So these files (or packages) need to classify in distinct ways.
How to Create a Package?
Suppose you have a file called HelloWorld.java, and you want to put this file in package java
|
1 2 3 4 5 |
public class HelloWorld { public static void main(string[] args { system. out.println("HelloWorld"); } } |
Now compile this file as:
path>javac-d .HelloWorld.java
What are the Advantages of Packages in Java?
Some advantages of the package in java are as follow:
1. Name Collision
Packaging helps to avoid class name collision. When there is the use of the same class name, it needs to be present in different directories. Packaging supports these memoranda and appropriately distinguishes the files of the same name.
The benefits to using packages provide ease of maintenance, organization, and increase collaboration among software developers.
2. Provide Control Access
The access specifiers have ingress control on package level and protected. A member declared in the program as protected is approachable by classes inside the same packages and the subclasses. A member without a member declaration as protected or any access specifier that is default specifier is approachable only by classes in the same package.
3. Reuse of Code
The most useful advantage of packages is reusability. When there is development in software, and due to a lack of communication between programmers, a programmer writes the same codes twice. Saves the instruction in some other package. Whenever there is a need for that particular instruction, the developer will easily access it.
For example:
If an exam cell has two checking departments, both use the same calculation logic. Put the calculation logic in other packages that are accessible by both departments. Java supports three classes in different packages.
4. Information Hiding
With the help of packages, the class information will conceal. By specifying the data member as public, protected, and private with the use of the modifier.
5. Organization of Project
Packages play a significant role in organizing the structure of data. That contains several enumerations, interfaces, and classes. A project has various components, so it would be efficient if one package has the same enumerations, interfaces, and classes.
These are some advantages that developers used constantly.
