jdk8-mips64-public/langtools: test/tools/javac/lambda/MethodReference01.java@5ddecb91d843

8009545: Graph inference: dependencies between inference variables should be set during incorporation
Summary: Move all transitivity checks into the incorporation round
Reviewed-by: jjg

     1 /*

     2  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    24 /*

    25  * @test

    26  * @bug 8003280

    27  * @summary Add lambda tests

    28  *  use method reference to sort list elements by field

    29  * @author  Brian Goetz

    30  * @author  Maurizio Cimadamore

    31  * @run main MethodReference01

    32  */

    34 import java.util.*;

    36 public class MethodReference01 {

    38     interface Getter<U, T> {

    39         public U get(T t);

    40     }

    42     static class Foo {

    43         private Integer a;

    44         private String b;

    46         Foo(Integer a, String b) {

    47             this.a = a;

    48             this.b = b;

    49         }

    51         static Integer getA(Foo f) { return f.a; }

    52         static String getB(Foo f) { return f.b; }

    53     }

    55     public static <T, U extends Comparable<? super U>>

    56            void sortBy(List<T> s, final Getter<U, T> getter) {

    57         Collections.sort(s, new Comparator<T>() {

    58             public int compare(T t1, T t2) {

    59                 return getter.get(t1).compareTo(getter.get(t2));

    60             }

    61         });

    62     };

    64     public static void main(String[] args) {

    65         List<Foo> c = new ArrayList<Foo>();

    66         c.add(new Foo(2, "Hello3!"));

    67         c.add(new Foo(3, "Hello1!"));

    68         c.add(new Foo(1, "Hello2!"));

    69         checkSortByA(c);

    70         checkSortByB(c);

    71     }

    73     static void checkSortByA(List<Foo> l) {

    74         sortBy(l, Foo::getA);

    75         int oldA = -1;

    76         for (Foo foo : l) {

    77             if (foo.a.compareTo(oldA) < 1) {

    78                 throw new AssertionError();

    79             }

    80         }

    81     }

    83     static void checkSortByB(List<Foo> l) {

    84         sortBy(l, Foo::getB);

    85         String oldB = "";

    86         for (Foo foo : l) {

    87             if (foo.b.compareTo(oldB) < 1) {

    88                 throw new AssertionError();

    89             }

    90         }

    91     }

    92 }

Mercurial > jdk8-mips64-public > langtools / file revision

test/tools/javac/lambda/MethodReference01.java@5ddecb91d843

test/tools/javac/lambda/MethodReference01.java