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Java API's.


 Java API's.

Content :- 
1.Java API.
2.What Are Java APIs? 
3.Who Uses Java APIs?
4.Internal Developers.
5.Partner Developers.
6.Open Developers.
7.The Need for Java APIs.
8.Streamline Operating Procedures.
9.Improve Business Techniques.
10.Create Powerful Applications.
11.Types of Java APIs.
12.Public.
13.Private.
14.Partner.
15.Composite.
16.Data and API Services.
17.Internal API Services.
18.External API Services.
19.CRUD.
20.User Interface Services.
21.API Service Protocols.
22.Stateless.
23.Uniform Interface.
24.Client-Server.
25.Cache.
26.Layered.
27.The Most Commonly Used Java APIs.
28.The Advantages of API.
29.Extensive SQL Support.
30.Application.
31.Efficiency.
32.Automation.
33.Integration.
34.Scope.
35.Customization.
36.Adaptability.

1.Java API.
Java APIs are integrated pieces of software that come with JDKs. APIs in Java provides the interface between two different applications and establish communication.

2.What Are Java APIs?

APIs are important software components bundled with the JDK. APIs in Java include classes, interfaces, and user Interfaces. They enable developers to integrate various applications and websites and offer real-time information.

The following image depicts the fundamental components of the Java API.


Now that we know the basics of the Java API and its components, let’s explore who uses them.
3.Who Uses Java APIs?

Three types of developers use Java APIs based on their job or project :-

  1. Internal Developers.
  2. Partner Developers.
  3. Open Developers.
4.Internal Developers.

Internal developers use internal APIs for a specific organization. Internal APIs are accessible only by developers within one organization.

Applications that use internal APIs include :-

  • B2B
  • B2C
  • A2A
  • B2E

Examples include Gmail, Google Cloud VM, and Instagram.

5.Partner Developers.

Organizations that establish communications develop and use partner APIs. These types of APIs are available to partner developers via API keys.

Applications that use partner APIs include :-

  • B2B
  • B2C

Examples include Finextra and Microsoft (MS Open API Initiative).

6.Open Developers.

Some leading companies provide access to their APIs to developers in the open-source format. These businesses provide access to APIs via a key so that the company can ensure that the API is not used illegally.

The application type that uses internal APIs is :-

  • B2C

Examples include Twitter and Telnyx.

The next section explores the importance of Java APIs.

7.The Need for Java APIs.

Java developers use APIs to :-

8.Streamline Operating Procedures.

Social media applications like Twitter, Facebook, LinkedIn, and Instagram provide users with multiple options on one screen. Java APIs make this functionality
possible.

9.Improve Business Techniques.

Introducing APIs to the public leads many companies to release private data to generate new ideas, fix existing bugs, and receive new ways to improve operations. The Twitter developer account is an example of an API that gives programmers private API keys to access Twitter data and develop applications. 

10.Create Powerful Applications.

Online banking has changed the industry forever, and APIs offer customers the ability to manage their finances digitally with complete simplicity.
Below we discuss the various types of Java APIs.

11.Types of Java API's.

There are four types of APIs in Java :-

1.Public.

2.Private.

3.Partner.

4.Composite.

12.Public.

Public (or open) APIs are Java APIs that come with the JDK. They do not have strict restrictions about how developers use them.

13.Private.

Private (or internal) APIs are developed by a specific organization and are accessible to only employees who work for that organization. 

14.Partner.

Partner APIs are considered to be third-party APIs and are developed by organizations for strategic business operations.

15.Composite.

Composite APIs are microservices, and developers build them by combining several service APIs. 

Now that we’ve covered the types of Java APIs, let’s discuss the categorization of Java APIs based on the services that different varieties of APIs in Java provide.

16.Data and API Services.

Data and API services are another way to categorize Java APIs other than public, private, partner, and composite. APIs are also classified based on their data-manipulation capabilities and the variety of services they offer, including :-

1.Internal API services.

2.External API services.

3.CRUD.

4.User interface services.

17.Internal API Services.

Internal API services are developed to offer organizations services specific to that organization. These services include only complex data operations and internal processes.

18.External API Services.

External APIs are open-source APIs that developers integrate into an existing application or website.

19.CRUD.

CRUD APIs provide data manipulation operations over various data storage units such as software as a service (SaaS) and relational database management systems (RDBMS), using standard storage-unit connecting tools like Java Database Connectivity (JDBC). 

20.User Interface Services.

User interface service APIs are open-source APIs that allow developers to build user interfaces for mobile devices, computers, and other electronics.

Next, let’s examine the rules and protocols that Java APIs follow.

21.API Service Protocols.

The rules and protocols guide the functionality of the Java API. Different APIs have different service protocols. Let’s consider an example of RESTful API service protocol as an example.

For a typical RESTful API, developers must follow these rules :-

1.Stateless.

2.Uniform interface.

3.Client-server.

4.Cache.

5.Layered.

22.Stateless.

A RESTful API follows client-server architecture so it must be stateless.

23.Uniform Interface.

The entities in a RESTful API are the server and clients. Applications that run on a global scale need a uniform client and server interface through the Hypertext Transfer Protocol (HTTP). Uniform Resource Identifiers (URIs) allocate the required resources. 

24.Client-Server.

The client-server model used in the RESTful API should be fault-tolerant. Both the client and server are expected to operate independently. The changes made at the client end should not affect the server end and vice versa.

25.Cache.

Including a cache memory allows the application to record intermediate responses and run faster in real-time. A RESTful API also includes the cache memory.  

26.Layered.

A RESTful API is built using layers. Layers in the API are loosely coupled, or independent, from each other. Each layer contributes to a different level of hierarchy and also supports encapsulation.

 Next we’ll go over the most frequently used Java APIs.

27.The Most Commonly Used Java APIs.

API

Acronym

RESTful API

none

Web API

none

Facebook.4j

none

Twitter.4j

none

JavaHelp

none

Java Advanced Imaging

JAI

Java Data Objects

JDO

Java Media Frameworks

JMF

Java Persistence API

JPA

Java Speech API

JSAPI

Java 3D

J3D

Java USB for Windows

none

Android API

Google

Association of the Standardization of Embedded Platforms

ESR Consortium

Java Naming and Directory Interface

JNDI 

Next, let’s examine the significant advantages of APIs in Java.

28.The Advantages of API's.

Some of the main advantages of using Java APIs include :-


29.
Extensive SQL Support.

APIs in Java enable a wide range of SQL support services in user applications through a component-based interface.

30.Application.

APIs in Java provide effortless access to all of an application’s major software components and easily deliver services.

31.Efficiency.

Java APIs are highly efficient because they enable rapid application deployment. Also, the data that the application generates is always available online. 

32.Automation.

APIs allow computers to automatically upload, download, update and delete data automatically without human interaction.

33.Integration.

Java APIs can integrate into any application and website and provide a fluid user experience with dynamic data delivery.  

34.Scope.

Java APIs easily make websites, applications, and information available to a wide range of users and audiences.

35.Customization.

Java APIs enable developers and businesses to build applications that personalize the user interface and data.

36.Adaptability.

Java APIs are highly flexible and adaptable because they can easily accept feature updates and changes to frameworks and operating environments.

Reference :- Ravikaran A S.


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