Name: bsC130419 Date: 07/20/2001


java version "1.4.0-beta"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta-b65)
Java HotSpot(TM) Client VM (build 1.4.0-beta-b65, mixed mode)


Obtain a channel for a file over 65336 bytes in length. Create a
MappedByteBuffer from the channel, in any mode, with a starting position of at
least 65536. This action causes an IOException, "Access is denied", even if the
file is large enough for the mapping to definitely succeed.

import java.io.*;
import java.nio.channels.*;

public class MapTest {
    public static void main(String[] args) throws Exception {
        RandomAccessFile raf = new RandomAccessFile(args[0], "r");
        FileChannel channel = raf.getChannel();
        channel.map(FileChannel.MAP_RO, 65536, 100);
    }
}

java MapTest testfile

Exception in thread "main" java.io.IOException: Access is denied
        at sun.nio.ch.FileChannelImpl.map0(Native Method)
        at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:386)
        at MapTest.main(MapTest.java:8)
(Review ID: 128527)
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