test/java/nio/channels/FileChannel/TransferToNonWritable.java

/*
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 * 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.
 *
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 */

/* @test
 * @bug 4732777
 * @summary Test if transferTo throws right exceptions
 */

import java.io.*;
import java.nio.channels.*;


public class TransferToNonWritable  {

    public static void main(String args[]) throws Exception {
        File blah = File.createTempFile("blah", null);
        blah.deleteOnExit();

        FileInputStream fis = new FileInputStream(blah);
        FileChannel channel = fis.getChannel();
        try {
            channel.transferTo((long)0, (long)2, channel);
            throw new RuntimeException("Test failed");
        } catch (NonWritableChannelException nwce) {
            // Correct result
        } finally {
            channel.close();
            blah.delete();
        }
    }
}