JDK (Java Development Kit) is a software package used to develop, compile, and run Java applications. It provides all the tools needed to create Java programs.
The JDK includes the Java Compiler (javac), Java Runtime Environment (JRE), and other development tools. Developers use the JDK to write Java code, compile it into bytecode, and run the application.
In simple words, JDK is the complete toolkit required to develop and run Java applications.