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Java virtual machine and byte code

The Java Virtual Machine (JVM) is a virtual machine that runs on top of a physical machine, such as a computer or server. It is responsible for interpreting and executing Java bytecode, which is a set of instructions that are compiled from Java source code.

Java bytecode is a highly optimized set of instructions that are designed to be executed by the JVM. It is platform-agnostic, meaning that it can be run on any device that has a JVM installed. This makes it possible to write code once and run it on any device, without having to worry about the underlying hardware or operating system.

The JVM plays a crucial role in the Java ecosystem, as it enables developers to write code that can be run on a wide range of devices and platforms. It also provides a number of features that make it easier for developers to create high-quality software, such as garbage collection, security features, and support for concurrency and parallelism.