JVM

 Java Virtual Machine(JVM) is combination of operating system and java interpreter.We can run our java programs on a wide verity of computers using a range of operating system.This can be possible here because, the JVM does not execute directly java program on our computer.It run on JVM which is implemented inside computer by java java interpreter.

The  java program that we converts by java compiler to binary file consisting by java compiler to byte codes. The java interpreter inspects the byte codes,check it out to ensure that it is safe to execute and then it execute.

The  java interpreter can run standalone or it can be part of a web browser where it can be in walk to run applets in a web page