JVM, JDK, and JRE

VM (Java Virtual Machine):

• Definition: Abstract computing machine for executing Java bytecode on various hardware platforms.
• Functionality: Executes Java bytecode, manages memory, performs garbage collection.
• Platform Independence: Enables Java programs to run on any device with compatible JVM.

JDK (Java Development Kit):

• Definition: Development kit for creating Java applications.
• Components: Compiler (javac), Java Runtime Environment (JRE), development tools.
• Usage: Developers use JDK for writing, compiling, and debugging Java applications.

JRE (Java Runtime Environment):

• Definition: Runtime environment for running Java applications.
• Functionality: Executes Java bytecode, includes JVM and core libraries.
• Deployment: End-users install JRE to run Java applications, excludes development tools.

Summary

• JVM interprets and executes Java bytecode.
• JDK includes tools for Java development, including compiler and runtime environment.
• JRE provides the runtime environment required to run Java applications, including JVM and core libraries.