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3. What is Java API?

4. Click here to watch the video

5. What is Java API?
Java JRE JDK
Java consists of two major components, JRE and JDK

6. What is Java API?
JDK
Compiler JVM APIs
JDK consists of three major components

7. What is Java API?
Java
Compiler
A Java compiler is a predefined program that converts the high-level,
user-written code language to low-level, computer-understandable,
byte-code language during the compile time

8. What is Java API?
JVM
JVM(Java Virtual Machine) processes the byte code obtained from
the compiler and generates an output in user-readable format

9. What is Java API?
Java API
Like JVM and Compiler, Java APIs are integral software packages
that come along with JDK. The primary intention of API is to establish
communication between applications

10. Interpreter
Java API
JVM
Java Program
Application Hardware
Java
Program
What is Java API?
Fundamental Components of Java API

11. What is Java API?
Types of Developers using various types of APIs
Open Developers Internal Developers Partner Developers

12. What is Java API?
Types of Developers using various types of APIs
Open Developers
Leading Companies provide access to their APIs as Open-Source
through authentication via a Unique Secret Key to keep track and
ensure legal usage

13. What is Java API?
Types of Developers using various types of APIs
Open Developers
Open Developers include:
B2C Team

14. What is Java API?
Types of Developers using various types of APIs
Internal Developers
Internal Developers belong to a specific organization working in a
closed environment. They use APIs with high Security that can
establish communication and has access to only the Organization
personnel

15. What is Java API?
Types of Developers using various types of APIs
Internal Developers
Internal Developers include:
B2C Team
B2B Team
A2A Team
B2E Team

16. What is Java API?
Types of Developers using various types of APIs
Partner Developers
Partner Developers are like Internal Developers. The only difference is,
there are two or more organizations in collaboration with each other while
accessing the resources and API

17. What is Java API?
Types of Developers using various types of APIs
Partner Developers
Partner Developers include:
B2C Team
B2C Team

18. Need for Java API

19. Need for Java API
Streamline Operations Improve Business Create Powerful Apps

20. Need for Java API
Streamline Operations
Leading social Media applications, Delivery, and F and B
applications are running smooth and hassle-free because of
significant improvement by implementing APIs

21. Need for Java API
Improve Business
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

22. Need for Java API
Create Powerful Apps
Online banking has changed the industry forever, and APIs offer
customers the ability to manage their finances digitally with
complete simplicity

23. Types of Java API

24. Types of Java API
Java API
Private CompositePublic Partner
There are mainly four types of APIs in Java as shown below

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

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

27. Types of Java API
Partner
Partner APIs are considered to be third-party APIs and are
developed by organizations for strategic business operations

28. Types of Java API
Composite
Composite APIs are microservices, and developers build
them by combining several service APIs

29. Data API and Services

30. Data API and Services
Data API and 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

31. Data API and Services
Data API and Services
Internal API Services External API Services
CRUD Operations UI Services

32. Data API and Services
Data API and Services
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

33. Data API and Services
Data API and Services
External API Services
External APIs are open-source APIs that developers integrate into an
existing application or website

34. Data API and Services
Data API and Services
CRUD Operations
CRUD APIs provide data manipulation operations over various data
storage units such as SaaS and RDBMS, using standard storage-unit
connecting tools like JDBC

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

36. API Service Protocols

37. 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

38. API Service Protocols
• Stateless
• Uniform interface
• Client-server
• Cache
• Layered

39. API Service Protocols
Since the RESTful API follows client-server architecture by default, it
is recommended that the RESTful API Services to be stateless all the
time
Stateless

40. API Service Protocols
The entities in a RESTful API are the server and clients. Applications
that run on a global scale need a client and server interface through
HTTP. URI allocates the resources
Uniform Interface

41. API Service Protocols
The client-server model used in the RESTful API should be fault-
tolerant. Both the client and server are expected to operate
independently
Client-Server

42. API Service Protocols
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
Cache

43. API Service Protocols
A RESTful API is built using layers that are loosely coupled, or
independent, from each other. Each layer contributes to a different
level of hierarchy and supports encapsulation
Layered

44. Commonly used APIs

45. Commonly used APIs
API
Web API
Facebook.4j
Twitter.4j
Android API
Java Advanced Imaging
Java Data Objects
Acronym
None
None
None
Google
JAI
JDO

46. Commonly used APIs
API
RESTful API
Java Media Frameworks
Java Persistence API
Java Speech API
Java 3D
Java USB for Windows
Acronym
none
JMF
JPA
JSAPI
J3D
none

47. Advantages of Java APIs

48. Advantages of Java APIs
SQL Support
Application
Efficiency
Automation
Adaption
Customization
Scope
Integration