Java Application Programming Interface (Java API)
An application programming interface (API), in the context of Java, is a collection of predefined packages, classes, and interfaces with their respective methods, fields and constructors. Similar to a user interface, which facilitates interaction between humans and computers, an API serves as a software program interface facilitating interaction.In Java, most basic programming tasks are performed by the API’s classes and packages, which are helpful in minimizing the number of lines written within pieces of code.
The API is a library of available Java classes, packages and interfaces.The API help programmers determine class or package functions, parameters and other necessary information for implementation.
The three API types are as follows:
- Official Java core API, which is bundled with the JDK download.
- Optional official Java APIs, which may be downloaded if needed.
- Unofficial APIs, which are third-party APIs that may be downloaded from source websites.
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