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What is Java Virtual Machine
Java Virtual Machine is software that converts the required part of the byte code into its equivalent executable code. Java Virtual Machine loads executable code into Random Access Memory.
This code will get executed by the local operating system then deletes the executable code from the Random Access Memory.
The JVM is a machine within a machine, this machine facilitates java byte-code to be affected on any processor not considering the operating system as actions or operating system calls.
Once the Java Virtual Machine has been implemented for a given platform (any operating system) any java program can run on that particular platform.
Conversion
The Java Virtual Machine converts a .class file into its equivalent executable code. Now if a Java Virtual Machine is in the windows operating system environment then it converts its equivalent executable code and this executable code will be understood by the Windows operating system environment only.
In the same way, if a Java Virtual Machine is in UNIX or another operating system environment then it converts its equivalent executable code and this executable code will be understood by UNIX or another operating system environment only.
The Interpretation of byte-code
The Java virtual machine can either interpret the byte-code one instruction at a time or the byte-code can be compiled additional for the real processor using the just-in-time compiler.
But the platform in-dependency of the Java Virtual Machine is not considered when saying Java is platform independent, this is because Java Virtual Machine is supplied free of cost through the internet.
The Java virtual machine is specifically available for different hardware and software platforms.
The Java Virtual Machine provides write once and runs anywhere programming facility, we can say that the Java Virtual Machine is an essential component of the Java platform.