jdk/test/java/nio/MappedByteBuffer/ZeroMap.java
author ohair
Tue, 25 May 2010 15:58:33 -0700
changeset 5506 202f599c92aa
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child 5970 d4e98bbfb0be
permissions -rw-r--r--
6943119: Rebrand source copyright notices Reviewed-by: darcy, weijun
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/*
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 * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/* @test
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 * @bug 4802340
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 * @summary Testing force(), load() isLoaded() of zero len MBB
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 */
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import java.io.*;
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import java.nio.*;
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import java.util.*;
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import java.nio.channels.*;
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public class ZeroMap {
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    public static void main(String[] args) throws Exception {
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        Random random = new Random();
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        long filesize = random.nextInt(1024*1024);
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        int cut = random.nextInt((int)filesize);
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        File file = new File("Blah");
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        RandomAccessFile raf = new RandomAccessFile(file, "rw");
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        raf.setLength(filesize);
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        FileChannel fc = raf.getChannel();
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        MappedByteBuffer buf1 = fc.map(
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                        FileChannel.MapMode.READ_WRITE, cut, 0);
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        buf1.force();
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        buf1.load();
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        buf1.isLoaded();
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        fc.close();
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        raf.close();
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    }
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}