What is the difference between JDK and JRE and JVM

**JVM (Java Virtual Machine):**
- The JVM, or Java Virtual Machine, is an abstract machine that provides an execution environment for Java bytecode. It is responsible for running Java applications by interpreting or compiling the bytecode into machine code at runtime.
- The JVM is platform-independent, allowing Java programs to run on any device or operating system that has a JVM implementation.
- It provides features such as memory management (garbage collection), security, and exception handling.

**JRE (Java Runtime Environment):**
- The JRE, or Java Runtime Environment, is a package of software that includes the JVM and other libraries and components needed for running Java applications but excluding development tools. It is essentially what end-users need to run Java applications on their machines.
- The JRE includes the JVM, class libraries, and other necessary files to support the execution of Java applications. It does not contain development tools such as compilers and debuggers.

**JDK (Java Development Kit):**
- The JDK, or Java Development Kit, is a full-featured software development kit that includes the JRE along with development tools like compilers, debuggers, and other utilities. It is intended for developers who want to write, compile, and run Java applications.
- The JDK includes everything in the JRE and additional tools needed for Java development. It is the complete package for building and developing Java applications.

**Summary of Differences:**
- **JVM:** Provides the runtime environment for Java applications, executing Java bytecode. It is platform-independent.
- **JRE:** Includes the JVM, class libraries, and other files needed for running Java applications. It is a subset of the JDK and is intended for end-users.
- **JDK:** A comprehensive development kit that includes the JRE along with development tools like compilers and debuggers. It is intended for Java developers.

In summary, the JVM is the runtime engine that executes Java bytecode, the JRE is a package that includes the JVM and necessary libraries for running Java applications, and the JDK is a complete development kit that includes the JRE along with tools for Java development.