Crated a File of size 100 bytes less Integer.MAX_VALUE.

1)When tried to map this file region from postion 0. it throws "IOException:The parameter is incorrect" on windows but it doesnt throw any exception on solaris

Parameters passed to FileChannel.map method are as per spec
 mode - MapMode.READ_ONLY
 position - 0
 size = 2147483549 ( less than Integer.MAX_VALUE )
 
2)if the following Parameters passed to FileChannel.map then the Exception message is "Access is denied" on windows ,"bad file number" on solaris , if region to be mapped is
decreased to 10000, it doesnt throw any exception as in case 3.
 
 mode - MapMode.READ_ONLY
 position - 1
 size = 2147483549 ( less than Integer.MAX_VALUE )

3) doesnt throw any Exception for the following parameters
 mode - MapMode.READ_ONLY
 position - 0/1
 size = 10000

Please See the following Code and Result
<version>
java version "1.6.0-beta2"
Java(TM) SE Runtime Environment (build 1.6.0-beta2-b80)
Java HotSpot(TM) Client VM (build 1.6.0-beta2-b80, mixed mode)
</version>
1)
<Code>
import java.io.*;
import java.nio.channels.*;
import java.nio.*;

public class TestFile {
   public static void main(String... args) {

        try {
            File fn = new File("gbfile");
            //Creating a file 100 byts less 2GB file.
            RandomAccessFile raf = new RandomAccessFile(fn,"rw");
            long size = (1024L * 1024L * 1024L) * 2L;
            raf.seek ( size - 101 );
            raf.write( 1 );
            raf.close();

            //Mapping the created File
            FileInputStream fis = new FileInputStream(fn);
            FileChannel fc = fis.getChannel();
            System.out.println("File size : "+ fc.size() +" << "+ " Integer.MAX_VALUE = "+Integer.MAX_VALUE + ((fc.size() < Integer.MAX_VALUE)?" yes":" no"));
            MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0,fc.size());
}catch( IOException e) {
e.printStackTrace ();
}
      }

}

</Code>
<Result on windows>
File size : 2147483549 << Integer.MAX_VALUE = 2147483647 yes
java.io.IOException: The parameter is incorrect
        at sun.nio.ch.FileChannelImpl.map0(Native Method)
        at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:742)
        at TestFile.main(TestFile.java:21)
</Result on windows>
<Result on Solaris>
# /net/sqindia.india/export/disk09/jdk/1.6.0/latest/binaries/solsparc/bin/java TestFile
File size : 2147483548 << Integer.MAX_VALUE = 2147483647 yes
<Result on Solaris>

2)
<Code>
//Same as Above Program except the position within the file at which the mapped region is to start 1
import java.io.*;
import java.nio.channels.*;
import java.nio.*;

public class TestFile {
    public static void main(String... args) {

        try {
            File fn = new File("gbfile");
            //Creating a file 100 byts less 2GB file.
            RandomAccessFile raf = new RandomAccessFile(fn,"rw");
            long size = (1024L * 1024L * 1024L) * 2L;
            raf.seek ( size - 101 );
            raf.write( 1 );
            raf.close();

            //Mapping the created File
            FileInputStream fis = new FileInputStream(fn);
            System.out.println("Can Read " + fn.canRead());
            FileChannel fc = fis.getChannel();
            System.out.println("File size : "+ fc.size() +" << "+ " Integer.MAX_VALUE = "+Integer.MAX_VALUE + ((fc.size() < Integer.MAX_VALUE)?" yes":" no"));
            MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 1,fc.size());
}catch( IOException e) {
e.printStackTrace ();
}
    }
}

</Code>
<Result on windows>
Can Read true
File size : 2147483549 << Integer.MAX_VALUE = 2147483647 yes
java.io.IOException: Access is denied
        at sun.nio.ch.FileChannelImpl.truncate0(Native Method)
        at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:731)
        at TestFile.main(TestFile.java:22)
</Result on windows>
<Result on Solaris>
Can Read true
File size : 2147483548 << Integer.MAX_VALUE = 2147483647 yes
java.io.IOException: Bad file number
        at sun.nio.ch.FileChannelImpl.truncate0(Native Method)
        at sun.nio.ch.FileChannelImpl.map(FileChannelImpl.java:731)
        at TestFile.main(TestFile.java:43)
</Result on Solaris>

3)
<Code>
import java.io.*;
import java.nio.channels.*;
import java.nio.*;

public class TestFile {
    public static void main(String... args) {

        try {
            File fn = new File("gbfile");
            //Creating a file 100 byts less 2GB file.
            RandomAccessFile raf = new RandomAccessFile(fn,"rw");
            long size = (1024L * 1024L * 1024L) * 2L;
            raf.seek ( size - 101 );
            raf.write( 1 );
            raf.close();

            //Mapping the created File
            FileInputStream fis = new FileInputStream(fn);
            System.out.println("Can Read " + fn.canRead());
            FileChannel fc = fis.getChannel();
            System.out.println("File size : "+ fc.size() +" << "+ " Integer.MAX_VALUE = "+Integer.MAX_VALUE + ((fc.size() < Integer.MAX_VALUE)?" yes":" no"));
            MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 1,10000);
}catch( IOException e) {
e.printStackTrace ();
}
    }
}
</Code>
<Result on windows>
C:\home\rg157576\tmpjava>java TestFile
Can Read true
File size : 2147483548 << Integer.MAX_VALUE = 2147483647 yes
<Result on windows>
<Result on Solaris>
# /net/sqindia.india/export/disk09/jdk/1.6.0/latest/binaries/solsparc/bin/java TestFile
Can Read true
File size : 2147483548 << Integer.MAX_VALUE = 2147483647 yes
</Result on Solaris >