LambdaConv05.java revision 1414:01c9d4161882 
1/*
2 * Copyright (c) 2011, 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 */
23
24/*
25 * @test
26 * @bug 8003280
27 * @summary Add lambda tests
28 *  function type and method type inference
29 * @author  Alex Buckley
30 * @author  Maurizio Cimadamore
31 * @run main LambdaConv05
32 */
33
34import java.util.*;
35
36public class LambdaConv05 {
37
38    static void assertTrue(boolean cond) {
39        if (!cond)
40            throw new AssertionError();
41    }
42
43    int count = 0;
44
45    void sort(List<String> data) {
46      Collections.sort(data,
47                       (String a, String b) -> { LambdaConv05.this.count++; return a.length()-b.length(); });
48    }
49
50    public static void main(String[] args) {
51        ArrayList<String> arr = new ArrayList<>();
52        arr.add("Three");
53        arr.add("Four");
54        arr.add("One");
55        LambdaConv05 sorter = new LambdaConv05();
56        sorter.sort(arr);
57        assertTrue(arr.get(0).equals("One"));
58        assertTrue(arr.get(1).equals("Four"));
59        assertTrue(arr.get(2).equals("Three"));
60        assertTrue(sorter.count == 2);
61    }
62}
63