Java example source code file (LambdaExpr11.java)

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Java - Java tags/keywords

assertionerror, inner, inner2, inner3, lambdaexpr11, runnable, subinner

The LambdaExpr11.java Java example source code

/*
 * Copyright (c) 2012, 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 8003280
 * @summary Add lambda tests
 *  check that creating an inner class from a lambda does add a captured this
 * @run main LambdaExpr11
 */
public class LambdaExpr11 {

    static int assertionCount = 0;

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

    class Inner {
        Inner() { assertTrue(true); }
    }

    void test() {
        Runnable r1 = ()-> { new Inner(); };
        r1.run();
        Runnable r2 = ()-> { new Inner() {}; };
        r2.run();
        Runnable r3 = ()-> { class SubInner extends Inner {}; new SubInner(); };
        r3.run();
        Runnable r4 = ()-> { class SubInner extends Inner {}; new SubInner() {}; };
        r4.run();
        new Inner2().test();
    }

    class Inner2 {
        void test() {
            Runnable r1 = ()-> { new Inner(); };
            r1.run();
            Runnable r2 = ()-> { new Inner() {}; };
            r2.run();
            Runnable r3 = ()-> { class SubInner extends Inner {}; new SubInner(); };
            r3.run();
            Runnable r4 = ()-> { class SubInner extends Inner {}; new SubInner() {}; };
            r4.run();
            new Inner3().test();
        }

        class Inner3 {
            void test() {
                Runnable r1 = ()-> { new Inner(); };
                r1.run();
                Runnable r2 = ()-> { new Inner() {}; };
                r2.run();
                Runnable r3 = ()-> { class SubInner extends Inner {}; new SubInner(); };
                r3.run();
                Runnable r4 = ()-> { class SubInner extends Inner {}; new SubInner() {}; };
                r4.run();
            }
        }
    }

    public static void main(String[] args) {
        new LambdaExpr11().test();
        assertTrue(assertionCount == 12);
    }
}