Java Virtual Machine (JVM) and Bytecode
What is JVM?
The Java Virtual Machine (JVM) is an essential component of the Java platform that enables Java programs to run on different operating systems without modification. It acts as an abstraction layer between Java applications and the underlying hardware.
Key Responsibilities of JVM:
- Compiling Bytecode – JVM interprets Java bytecode, converting it into machine-specific instructions.
- Memory Management – JVM handles memory allocation and garbage collection automatically.
- Security Enforcement – JVM provides a secure execution environment by restricting unauthorized access to system resources.
- Execution of Java Programs – JVM ensures Java applications run consistently across platforms.
What is Bytecode?
Bytecode is the intermediate representation of Java code, generated after compilation. It is a low-level, platform-independent instruction set that JVM understands and executes. Bytecode is stored in .class files and can be executed on any JVM implementation, ensuring Java's portability.