Cryptocurrency is a type of digital currency that uses cryptography for security and anti-counterfeiting measures. Public and private keys are often used to transfer cryptocurrency between individuals. As a counter-culture movement that is often connected to cypherpunks, cryptocurrency is essentially a fiat currency. This means users must reach a...
An application programming interface (API), in the context of Java, is a collection of prewritten 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.
Java Development Kit (JDK) is comprised of three basic components, as follows:
The Java API, included with the JDK, describes the function of each of its components. In Java programming, many of these components are pre-created and commonly used. Thus, the programmer is able to apply prewritten code via the Java API. After referring to the available API classes and packages, the programmer easily invokes the necessary code classes and packages for implementation.
The API is a library of available Java classes, packages and interfaces. The three API types are as follows:
The APIs help programmers determine class or package functions, parameters and other necessary information. The official API includes packages, e.g., applet packages, graphics and GUI swing packages, input/output (IO) packages and Abstract Windows Toolkit (AWT), among others.
There are three frames when an API starts, as follows:
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