JDK stands for Java Development Kit, and it is a software development kit used to develop and deploy Java applications.
The JDK includes a set of programming tools, such as the Java compiler, Javadoc, and the Java Virtual Machine (JVM), as well as libraries and APIs for building Java applications. It also contains additional tools for debugging, testing, and profiling Java applications.
Developers use the JDK to write and compile Java code, package it into JAR files, and deploy it to servers or client machines. The JDK is available for multiple platforms, including Windows, macOS, and Linux, and can be downloaded for free from the Oracle website.
The JDK is an essential tool for Java developers, as it provides everything needed to create, test, and run Java applications. It is also updated regularly with new features and improvements to the Java language and platform.