langtools/test/tools/javac/defaultMethods/Pos01.java
author duke
Wed, 05 Jul 2017 23:01:50 +0200 (2017-07-05)
changeset 44228 e46434c65a2b
parent 19934 1d8232b1aa18
permissions -rw-r--r--
Merge
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/*
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 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @bug 7192246
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 * @summary basic test for default methods
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 * @author  Maurizio Cimadamore
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 */
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import java.util.*;
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public class Pos01 {
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    interface Mapper<T> {
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        T map(T in);
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    }
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    interface ExtendedList<T> extends List<T> {
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        default List<T> testMap(Mapper<T> r) {
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            return Pos01.<T>listMapper(this, r);
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        }
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    }
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    static class MyList<E> extends ArrayList<E> implements ExtendedList<E> {}
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    public static void main(String[] args) {
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       MyList<Integer> l = new MyList<Integer>();
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       l.add(1); l.add(2); l.add(3);
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       l.testMap((Integer x) -> x * x );
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    }
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    static <T> List<T> listMapper(List<T> l, Mapper<T> mapper) {
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        MyList<T> new_list = new MyList<T>();
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        for (T el : l) {
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            new_list.add(mapper.map(el));
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        }
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        return new_list;
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    }
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}