JVM

Java runtime engine

JVM stands for Java Virtual Machine, the software layer that executes Java programs.

Rather than compiling directly to machine code, Java compiles to bytecode that runs on the JVM, allowing the same program to work on any platform with a compatible JVM installed.

This "write once, run anywhere" portability made Java popular for enterprise and cross-platform development.

The JVM also manages memory allocation and garbage collection.

runtime

heap

Jumbled collection of items

stackItems piled vertically
interpreterOne who conveys meaning between languages
synchronizationAligning timing across systems

reflection

Java

JDK

Java development software bundle

OracleProphetic shrine or speaker
servletServer-side request processor
appletMiniature embedded program

Maven · JAR · WAR · annotations · generics · lambda

languages

Kotlin

JVM programming language

CeylonSri Lanka's former name
interoperabilityCross-platform functional harmony
polyglotOne knowing many languages

Frege

performance

profiling

Characterizing by patterns

monitoringOngoing observation of something
warmupPre-activity preparation
vectorizationLoop-free array computation

benchmarking · latency · throughput · optimization

bytecode

instruction

Guidance for action

operandQuantity being calculated
mnemonicTechnique for retention
compilationGathered works assembled together

disassembly · verification

Opposites

execution model

JVMbare metal

Direct hardware access, unmediated

compiler · machine code · GCC · assembly language · hardware

runtime environment ecosystem

JVMV8

Eight-cylinder engine layout

language ecosystem

JVMV8 engine

Eight-cylinder automotive motor

Rust

Family

java, Java

Familiarity: Top 1,000,000
Profile: Used worldwide · Rated G