/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

/* @test

 * @bug 4802340

 * @summary Testing force(), load() isLoaded() of zero len MBB

 */

import java.io.*;

import java.nio.*;

import java.util.*;

import java.nio.channels.*;

public class ZeroMap {

    public static void main(String[] args) throws Exception {

        Random random = new Random();

        long filesize = random.nextInt(1024*1024);

        int cut = random.nextInt((int)filesize);

        File file = new File("Blah");

        RandomAccessFile raf = new RandomAccessFile(file, "rw");

        raf.setLength(filesize);

        FileChannel fc = raf.getChannel();

        MappedByteBuffer buf1 = fc.map(

                        FileChannel.MapMode.READ_WRITE, cut, 0);

        buf1.force();

        buf1.load();

        buf1.isLoaded();

        fc.close();

        raf.close();

    }

}