1 /*

     2  * Copyright 2001 Sun Microsystems, Inc.  All Rights Reserved.

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

     4  *

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

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

     7  * published by the Free Software Foundation.

     8  *

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

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

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

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

    13  * accompanied this code).

    14  *

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

    16  * 2 along with this work; if not, write to the Free Software Foundation,

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

    18  *

    19  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    20  * CA 95054 USA or visit www.sun.com if you need additional information or

    21  * have any questions.

    22  */

    23 

    24 /* @test

    25  * @bug 4510489

    26  * @summary Verify IOUtil.java reads to buffer limits

    27  */

    28 import java.io.*;

    29 import java.nio.*;

    30 import java.nio.channels.*;

    31 

    32 public class MapReadOnly {

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

    34         File testFile = File.createTempFile("test2", null);

    35         testFile.deleteOnExit();

    36         RandomAccessFile raf = new RandomAccessFile(testFile, "rw");

    37         FileChannel fc = raf.getChannel();

    38         MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0L,

    39                                       (int) fc.size());

    40         mbb.load();

    41         try {

    42             mbb.put((byte)3);

    43             throw new Exception("Test failed");

    44         } catch (ReadOnlyBufferException robe) {

    45             // Correct result

    46         }

    47         fc.close();

    48         raf.close();

    49     }

    50 }