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 import java.util.*;
  25 
  26 /**
  27  * @test
  28  * @bug 8003280
  29  * @summary Add lambda tests
  30  *   Parameter types inferred from target type in generics with wildcard
  31  * @compile InferenceTest2b.java
  32  * @run main InferenceTest2b
  33  */
  34 
  35 public class InferenceTest2b {
  36 
  37     private static void assertTrue(boolean cond) {
  38         if (!cond)
  39             throw new AssertionError();
  40     }
  41 
  42     public static void main(String[] args) {
  43 
  44         InferenceTest2b test = new InferenceTest2b();
  45 
  46         test.m1((a, b) -> {return a;});
  47         test.m2((a, b) -> {return a;});
  48         test.m3((a, b) -> a);
  49     }
  50 
  51     interface SAM6<T> {
  52         T m6(T a, T b);
  53     }
  54 
  55     void m1(SAM6<? super List<?>> s) {
  56         System.out.println("m1()");
  57         Stack<String> a = new Stack<String>();
  58         ArrayList<String> b = new ArrayList<String>();
  59         assertTrue(s.m6(a, b) == a);
  60 
  61         Vector<?> c = null;
  62         assertTrue(s.m6(c, b) == c);
  63     }
  64 
  65     void m2(SAM6<? super Integer> s) {
  66         System.out.println("m2()");
  67         assertTrue(s.m6(1, 2) == 1);
  68     }
  69 
  70     void m3(SAM6<? super Calendar> s) {
  71         System.out.println("m3()");
  72         Calendar gc = Calendar.getInstance();
  73         GregorianCalendar gc2 = new GregorianCalendar();
  74         assertTrue(s.m6(gc, gc2) == gc);
  75     }
  76 }