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What is Java Virtual Machine (JVM)?

JVM is an acronym for Java Virtual Machine. JVM is responsible for providing a runtime environment to Java bytecode which needs to be executed. JVM, as the name suggests, acts as a virtual machine or processor. It is well known fact that Java is a platform independent programming language which is mainly due to JVM. Platform independency is accomplished as a result of specific instruction lengths and other particularities of the platform. JVM will perform the following operations

  • Loads code
  • Verifies Code
  • And Executes it

Function of JVM

The function of JVM is categorized as two primary functions. First is JVM allows Java program to run any device regardless of the platform and operating system by abiding by its motto: "Write Once, Run Anywhere". The second is to manage the program memory and optimize it as well. But this was not the case when Java was released back in 1995. Every time develop had to write a program to a specific operating system and its memory was managed and optimized by the software developer. So thanks to JVM as it was a revelation. Since Java programming language keeps evolving and upgrading periodically, it is the best choice to learn Java if anyone wants to pursue a career as a developer.

JVM is technically defined as the specifications for a software program which executes and runs Java bytecode and also provides the runtime environment. In simple words, JVM is defined as the virtual machine which allows us to run a Java program. One can configure and modify JVM's setting accordingly to rely on it to optimize and manage the resources during execution of the bytecode.

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