What is JVM (Java Virtual Machine)

Rumman Ansari   Software Engineer   2022-03-02   11077 Share
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What is JVM (Java Virtual Machine)

The Java language is a high-level language. All language compilers translate source code into machine code. Java compiler does the same thing.You save a Java program in a .java file and compile it into a .class file. The .class file (also called bytecode). Output of a Java compiler is not executable code. Rather, it is bytecode. Bytecode is a highly optimized set of instructions designed to be executed by the Java run-time system, which is called the Java Virtual Machine (JVM).The bytecode is similar to machine instructions but is architecture neutral and can run on any platform that has a Java Virtual Machine (JVM).The JVM executes our code along with the code in the library.

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To execute a Java program is to run the program’s bytecode or .class file. You can execute the bytecode on any platform with a JVM, which is an interpreter . the original JVM was designed as an interpreter for bytecode. It translates the individual instructions in the bytecode into the target machine language code one at a time rather than the whole program as a single unit. Each step is executed immediately after it is translated.

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