CloseInvalidatesKeys.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * 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).
 *
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/* @test
 * @bug 4783178
 * @summary Ensure that closing a selector invalidates its keys
 */

import java.nio.channels.*;


public class CloseInvalidatesKeys {

    public static void main (String [] args) throws Exception {
        DatagramChannel ch = DatagramChannel.open();
        try {
            ch.configureBlocking(false);
            Selector sel = Selector.open();
            SelectionKey key = ch.register(sel, SelectionKey.OP_WRITE);
            sel.close();
            if (key.isValid())
                throw new Exception("Key valid after selector closed");
        } finally {
            ch.close();
        }
    }

}