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JVM (Java Virtual Machine)

JVM is an abstract machine. It is a specification that provides runtime environment in which java bytecode can be executed.
JVMs are available for many hardware and software platforms.

What is JVM

JVM is an abstract machine. It is a specification that provides runtime environment in which java bytecode can be executed.

1. A specification

where working of Java Virtual Machine is specified. But implementation provider is independent to choose the algorithm. Its implementation has been provided by Sun and other companies.

2. An implementation

Its implementation is known as JRE (Java Runtime Environment).

3. Runtime Instance

Whenever you write java command on the command prompt to run the java class, an instance of JVM is created.

What does JVM

The JVM performs following operation:-
Loads code
Verifies code
Executes code
Provides runtime environment


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