test/langtools/tools/javac/TryWithResources/ExplicitFinal.java

/*
 * Copyright (c) 2011, 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 7013420
 * @author Joseph D. Darcy
 * @summary Test that resource variables are accepted as explicitly final.
 */

import java.io.IOException;

public class ExplicitFinal implements AutoCloseable {
    public static void main(String... args) {
        try(final ExplicitFinal r2 = new ExplicitFinal()) {
            r2.toString();
        } catch (IOException ioe) {
            throw new AssertionError("Shouldn't reach here", ioe);
        }

        try(final @SuppressWarnings("unchecked") ExplicitFinal r3 = new ExplicitFinal()) {
            r3.toString();
        } catch (IOException ioe) {
            throw new AssertionError("Shouldn't reach here", ioe);
        }

        try(@SuppressWarnings("unchecked") ExplicitFinal r4 = new ExplicitFinal()) {
            r4.toString();
        } catch (IOException ioe) {
            throw new AssertionError("Shouldn't reach here", ioe);
        }
    }
    public void close() throws IOException {
        System.out.println("Calling close on " + this);
    }
}