/*
* Copyright ( c ) 2001 , 2010 , Oracle and / or its affiliates . All rights reserved .
* 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 .
*
* Please contact Oracle , 500 Oracle Parkway , Redwood Shores , CA 94065 USA
* or visit www . oracle . com if you need additional information or have any
* questions .
*/
/* @test
* @ bug 4462336 6799037
* @ summary Simple MappedByteBuffer tests
*/
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
public class Basic {
public static void main(String[] args) throws Exception {
byte [] srcData = new byte [20 ];
for (int i=0 ; i<20 ; i++)
srcData[i] = 3 ;
File blah = File.createTempFile("blah" , null );
blah.deleteOnExit();
FileOutputStream fos = new FileOutputStream(blah);
FileChannel fc = fos.getChannel();
fc.write(ByteBuffer.wrap(srcData));
fc.close();
fos.close();
FileInputStream fis = new FileInputStream(blah);
fc = fis.getChannel();
MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0 , 10 );
mbb.load();
mbb.isLoaded();
mbb.force();
if (!mbb.isReadOnly())
throw new RuntimeException("Incorrect isReadOnly" );
// repeat with unaligned position in file
mbb = fc.map(FileChannel.MapMode.READ_ONLY, 1 , 10 );
mbb.load();
mbb.isLoaded();
mbb.force();
fc.close();
fis.close();
RandomAccessFile raf = new RandomAccessFile(blah, "r" );
fc = raf.getChannel();
mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0 , 10 );
if (!mbb.isReadOnly())
throw new RuntimeException("Incorrect isReadOnly" );
fc.close();
raf.close();
raf = new RandomAccessFile(blah, "rw" );
fc = raf.getChannel();
mbb = fc.map(FileChannel.MapMode.READ_WRITE, 0 , 10 );
if (mbb.isReadOnly())
throw new RuntimeException("Incorrect isReadOnly" );
fc.close();
raf.close();
// clean-up
mbb = null ;
System.gc();
Thread .sleep(500 );
}
}
Messung V0.5 in Prozent C=94 H=92 G=92
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-06-10)
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