operation system

[Anabolik]

How to know if the operation system is 32-bit or 64-bit using java?

 

[Eric Sosman]

How to know if the operation system is 32-bit or 64-bit using java?

What do you mean by "32-bit or 64-bit?"

Better yet, take a step back and look at the wider issue:
What problem are you trying to solve, what decision are you
trying to make?

Imagine a method

public static int getOSBitness() {
// ... TBD ...
return bits;
}

.... in some class, and we imagine that you can call it and
get a result of 32 or 64 (or maybe something else). What
will your code do differently depending on the result? There
may be a more direct way to make the decision than to try to
infer something from "32-bitness" or "64-bitness."

 

[Roedy Green]

How to know if the operation system is 32-bit or 64-bit using java?

see http://mindprod.com/jgloss/wassup.html
http://mindprod.com/jgloss/properties.html

sun.arch.data.model = 32

--
Roedy Green Canadian Mind Products
http://mindprod.com

"We must be very careful when we give advice to younger people: sometimes
they follow it!"
~ Edsger Wybe Dijkstra, born: 1930-05-11 died: 2002-08-06 at age: 72

 

[Roedy Green]

see http://mindprod.com/jgloss/wassup.html
http://mindprod.com/jgloss/properties.html

sun.arch.data.model = 32

This is whether the Java is 64 bit, which is probably what you really
wanted to know.

Dump out system properties on both a 32 bit and 64 bit OS, and notice
the differences.
--
Roedy Green Canadian Mind Products
http://mindprod.com

"We must be very careful when we give advice to younger people: sometimes
they follow it!"
~ Edsger Wybe Dijkstra, born: 1930-05-11 died: 2002-08-06 at age: 72

 

[Arne Vajhøj]

see http://mindprod.com/jgloss/wassup.html
http://mindprod.com/jgloss/properties.html

sun.arch.data.model = 32

Question is: will this property exist on all JVM's ?

The name seems to indicate it is SUN specific, but it is present
in IBM and BEA.

Arne

 

[Arne Vajhøj]

What do you mean by "32-bit or 64-bit?"

Better yet, take a step back and look at the wider issue:
What problem are you trying to solve, what decision are you
trying to make?

Imagine a method

public static int getOSBitness() {
// ... TBD ...
return bits;
}

... in some class, and we imagine that you can call it and
get a result of 32 or 64 (or maybe something else). What
will your code do differently depending on the result?

Good question.

A good question that the original poster did not answer.

The real java'ish answer is: nothing.

A "good" Java program will not do different things on 32 bit and
64 bit.

Arne