One More Time: Shared Memory

Question

I've heard the designers of Java (Gosling, Et. Al.) are against supporting the concept of shared memory natively.
However, have they given any more thought to simple native shared memory support?
I know there are several "C" libraries with JNI that provide shared memory for Java. I just really would like native support.

Answer 1

I like it. Although it does leave a file around that I have to delete.
Any issues with this method?
BTW, here is the code from the reference:
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.util.*;
class TestShared1 {
public static void main(String[] args) throws Exception {
Random r = new Random();
//-- Opening the file
RandomAccessFile raf = new RandomAccessFile ("myshared", "rw");
FileChannel fc = raf.getChannel();
//-- Getting the memory-mapped byte buffer
MappedByteBuffer mbb = fc.map (FileChannel.MapMode.READ_WRITE, 0, 1024);
//-- Writing a random integer in the first 4 positions of the memory
//-- every second
for (int i = 0; i < 1000; ++i) {
try { Thread.sleep(1000); } catch (InterruptedException ex) {}
int x = r.nextInt();
mbb.putInt(0, x);
System.out.println ("Written to the shared memory: " + x);
fc.close();
raf.close();
and
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.util.*;
class TestShared2 {
public static void main(String[] args) throws Exception {
Random r = new Random();
//-- Opening the file
RandomAccessFile raf = new RandomAccessFile ("myshared", "rw");
FileChannel fc = raf.getChannel();
//-- Getting the memory-mapped byte buffer
MappedByteBuffer mbb = fc.map (FileChannel.MapMode.READ_WRITE, 0, 1024);
//-- Printing the integer that is in the first 4 positions of the memory
//-- every second
for (int i = 0; i < 1000; ++i) {
try { Thread.sleep(1000); } catch (InterruptedException ex) {}
int x = mbb.getInt(0);
System.out.println ("Read from the shared memory: " + x);
fc.close();
raf.close();
}