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JavaBeginner#jvm#jdk#jre

Difference between JDK, JRE and JVM?

JDK (Java Development Kit) = JRE + development tools (compiler, debugger). JRE (Java Runtime Environment) = JVM + libraries needed to run Java apps. JVM is the engine that actually executes bytecode. Developers need JDK; end users only need JRE.

Example
To compile: javac (part of JDK only).
To run a compiled app: java (available in JRE).
Installing 'JDK 17' gives you javac, java, jar, jdb, and the JRE bundled in.

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