Java Development Kit (abbreviated as JDK) is a platform for developing Java applications that is developed and distributed free of charge by Oracle. This set includes standard class libraries, various utilities, documentation, compiler and Java executive system. It is worth remembering that Java Development Kit does not include an integrated development environment, so using this platform you will have to write code in a third-party text editor and compile the code with the help of command line utilities. most of the modern integrated development environments in Java (such as NetBeans IDE, IntelliJ IDEA, Eclipse, etc.) are based on the services provided by this JDK and use its compiler, so this kit is usually included in their installer and distributed with them.