JDK, JRE, and JVM

JDK, JRE, and JVM are all related to Java programming language and its execution. Here are their differences:

1. JDK (Java Development Kit): JDK is a software development kit that provides tools needed to develop Java applications. It includes JRE, compilers, debuggers, and other tools for developing and testing Java applications. JDK is used by developers to create Java applications and applets.

2. JRE (Java Runtime Environment): JRE is a software environment used for running Java applications. It includes the JVM, libraries, and other components necessary for running Java applications but does not include any development tools. JRE is used by end-users who want to run Java applications on their computers.

3. JVM (Java Virtual Machine): JVM is a virtual machine that executes Java bytecode. Java bytecode is a compiled form of Java source code that can run on any platform that has a JVM installed. The JVM provides an environment for Java programs to run, and it manages the memory and provides other services needed for Java programs to execute.

In summary, JDK is used by developers to create Java applications, JRE is used by end-users to run Java applications, and JVM is used by both developers and end-users to execute Java programs.