Interview Question

What is the difference between JDK, JRE, and JVM?

JVM is the virtual machine specification; JDK is the full development and run-time distribution.

💡 Concept ✅ Quick Revision ☕ Java

Answer

The JVM is the specified virtual machine; a JDK is a development kit containing tools and a Java run-time implementation. • The JVM executes class-file instructions and manages run-time data areas. • The JDK includes tools such as javac and java plus standard modules. • Modern Java distributions do not always ship a separately branded public JRE product.

Example

Code

javac Main.java
java Main

Quick Revision

JVM is the virtual machine specification; JDK is the full development and run-time distribution.

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