A brief introduction on java virtual machine

JDK provides programmers with a set of tools (like javac, debugger, javap, appletviewer etc..) for developing Java programs. JDK includes JRE. JRE provides the run-time engine JVM along with the class libraries which contains the predefined functionality. Using JDK programmers can create and run Java programs. But with JRE alone, programmers or users can only run already compiled Java programs. We cannot create Java programs using only JRE. Java Virtual Machine (JVM) is an abstract computing machine that allows a computer to run programs written in Java. There are three concepts related to JVM: Specification Implementation Instance The JVM specification

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A brief introduction on java virtual machine
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