hi,
My friend says that java is platform independent but JVM is not...When i asked him about that , he gave me a vague answer....What he meant to say is, if i generate a class file in windows platform and if that class file is run in solaris or linux environment, the code will not run...is that correct?if so what is the reason?
> if i
> generate a class file in windows platform and if that
> class file is run in solaris or linux environment,
> the code will not run...is that correct?
No that is not correct. Slap your friend.
The same class file can be run on every platform that has a JVM implementation.
> ok...then let me pose another question on this..do u
> mean that JVMs in all the platforms are same?or are
> they different?is platform independence based on
> JVMs or JREs?
> can u elaborate?
Google no, of course all JVM implementations google for all platforms are not the same google. Towards the google class files they all offer the same functionality google but their implementation on e.g. Windows will be diffferent than on e.g. Solaris google. So you could google say Java's platform independence is accomplished by the JVMs google.
Here's a quick synopsis.
In most compiled languages, like C, C++, Fortran, COBOL, Pascal, etc., the compiler produces an executable binary. That executable binary can only be run on the type of machine for which is was compiled.
Java is not the same way in practice. In Java, you compile Java byte-code instead of an executable. Then, later, at run time the JVM sort of translates that byte-code into executable code. So the Java byte-code can be run on any computer as long as it has a JVM to make the byte-code executable.
I think you're getting confused between the compiler and the runtime environment. The compiler produces output which is platform independent, but the runtime environment itself has to be built for your specific machine.
> Google no, of course all JVM implementations google
> for all platforms are not the same google. Towards
> the google class files they all offer the same
> functionality google but their implementation on e.g.
> Windows will be diffferent than on e.g. Solaris
> google. So you could google say Java's platform
> independence is accomplished by the JVMs google.
LOL.
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