Skip to main content

Machine language is OS dependent

Given the previous information, it should be easier to figure out an answer to the original question. Since the JVM must translate the bytecode into machine language, and since the machine language depends on the operating system being used, it is clear that theJVM is platform (operating system) dependent – in other words, the JVM is not platform independent.

The JVM is not platform independent

The key here is that the JVM depends on the operating system – so if you are running Mac OS X you will have a different JVM than if you are running Windows or some other operating system. This fact can be verified by trying to download the JVM for your particular machine – when trying to download it, you will be given a list of JVM’s corresponding to different operating systems, and you will obviously pick whichever JVM is targeted for the operating system that you are running.

JVM translates bytecode into machine language

Every Java program is first compiled into an intermediate language called Java bytecode. The JVM is used primarily for 2 things: the first is to translate the bytecode into the machine language for a particular computer, and the second thing is to actually execute the corresponding machine-language instructions as well. The JVM and bytecode combined give Java its status as a "portable" language – this is because Java bytecode can be transferred from one machine to another.

http://www.programmerinterview.com/index.php/

Comments

Post a Comment

Popular posts from this blog

ifference between @RestController and @Controller

Difference between @RestController and @Controller Annotation in Spring MVC and REST Read more:  http://javarevisited.blogspot.com/2017/08/difference-between-restcontroller-and-controller-annotations-spring-mvc-rest.html#ixzz4sbGy2Glh The  @RestController  annotation in Spring MVC is nothing but a combination of  @Controller  and  @ResponseBody  annotation. It was added into Spring 4.0 to make the development of RESTful Web Services in Spring framework easier. If you are familiar with the  REST web services  you know that the fundamental difference between a web application and a REST API is that the response from a web application is generally view (HTML + CSS + JavaScript) while REST API just return data in form of JSON or XML. This difference is also obvious in the  @Controller  and  @RestController  annotation. The job of  @Controller  is to create a Map of model object and find a view but  @RestContr...
Post a Comment
Read more

Presentation topics

Topics for presentation : Knockout.js, Angular.js, Node,js, Kendo UI, MVC 4, Nuget, Ninject, Unity Framework, Dependency Injection , PMC Package Manager Control, Mordenizer, Moq, Json, Html5, Entity Framework code1st. Spring.net Castle Windsor , Structure Map and Microsoft Unity ,
Post a Comment
Read more
What happens when you compile/run the following code: class MyClass { public static void main(String[] args) { new MyClass(); } Ans: It executes and create a object for that class without reference. The output of the program is nothing.
Post a Comment
Read more