Class notes CS8962

Introduction to JRE and JVM
Relationship
Java Runtime Environment (JRE)

 It is a software package that provides the runtime
environment for executing Java applications.
 It includes the Java Virtual Machine (JVM), Java classes
library, and other components needed to run Java
programs.

Java Virtual Machine (JVM)

 It is an abstract machine that provides a runtime
environment in which Java bytecode can be executed.
 It is a crucial component of the Java platform as it enables
Java programs to run on any device that has a JVM
installed, regardless of the underlying hardware and
operating system.

Relationship between JRE and JVM

 The JVM is a part of the JRE.
 The JRE provides the JVM along with other components
needed to run Java applications.
 When a Java program is executed, the JVM interprets the
bytecode and provides the necessary runtime
environment.

Importance of JDK in Java Development

 Java Development Kit (JDK) is a software development kit
that includes the JRE and tools necessary for developing
Java applications.
 JDK is essential for Java development as it provides the
necessary environment for writing, compiling, and
debugging Java code.
 The Java compiler (javac) is a part of the JDK that is used
to compile Java source code into bytecode.