These instructions are part of the Java Virtual Machine Instruction Set Architecture (JVM ISA). Each bytecode instruction corresponds to a specific operation, such as loading a value onto the stack, performing arithmetic operations, or branching.

Bytecode instructions are fundamental operations that the JVM can execute. Examples of bytecode instructions include: Load and Store Operations: Loading values onto the stack or storing values from the stack. Arithmetic Operations: Performing mathematical operations such as addition, subtraction, multiplication, and division.

This explanation will cover what bytecode is, how it is generated, and its role in the Java Virtual Machine (JVM). Bytecode is an intermediate representation of a Java program that is generated by the Java compiler. Instead of producing native machine code for a specific platform, the Java compiler translates source code into bytecode.

Bytecode is stack-based, meaning all the data flows through a single operand stack. You load values onto the stack, operate on them, and pop the results back off. Once you get used to that pattern, the instructions start to feel more readable. One of the most common things bytecode has to do is move values around.