test/jdk/java/lang/invoke/lambda/LambdaClassFinal.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 8012028
 * @summary Generated Lambda implementing class should be final
 */

import java.lang.reflect.Modifier;
import java.io.Serializable;

public class LambdaClassFinal {

    interface I {
        void m();
    }

    interface Iser extends Serializable {
        void m();
    }

    static void assertTrue(boolean cond) {
        if (!cond)
            throw new AssertionError();
    }

    public static void main(String[] args) throws Exception {
        new LambdaClassFinal().test();
    }

     void test() throws Exception {
        I lam = () -> { };
        assertTrue((lam.getClass().getModifiers() & Modifier.FINAL) != 0);
        Iser slam = () -> { };
        assertTrue((slam.getClass().getModifiers() & Modifier.FINAL) != 0);
    }
}