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Bytecode
Also called P-code (see P-code machine)
TLDR: Bytecode is an intermediate, low-level representation of source code generated by a compiler to be executed on a virtual machine rather than directly by the hardware. It is used in languages like Java, C Sharp, and Python, enabling portability and platform independence. Bytecode acts as a bridge between human-readable source code and machine-executable instructions, ensuring consistent execution across multiple environments.
https://en.wikipedia.org/wiki/Bytecode
In Java, the Java Compiler translates Java source code into bytecode files with a `.class` extension, which are executed by the Java Virtual Machine (JVM). The JVM interprets the bytecode or further optimizes it through just-in-time compilation (JIT), converting it into machine code for faster execution. Bytecode includes instructions for stack operations, arithmetic, and object manipulation, making it highly efficient and compact.
https://docs.oracle.com/javase/specs/jvms/se20/html/jvms-2.html
The portability of bytecode allows applications to run seamlessly on any system with a compatible virtual machine. Advanced features like garbage collection and runtime optimizations ensure that bytecode executes efficiently, regardless of the underlying hardware. This flexibility and consistency make bytecode a cornerstone of modern, platform-independent programming languages.
https://www.oracle.com/java/technologies/javase/jvm-overview.html
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