Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: test/tools/javac/lambda/lambdaExpression/SamConversion.java
test/tools/javac/lambda/lambdaExpression/SamConversion.java
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| 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 * Test SAM conversion of lambda expressions in context of assignment, method call, return statement and cast. | |
| 29 * @compile SamConversion.java | |
| 30 * @run main SamConversion | |
| 31 */ | |
| 32 | |
| 33 public class SamConversion { | |
| 34 | |
| 35 static interface Foo { | |
| 36 Integer m(int i); | |
| 37 } | |
| 38 | |
| 39 static interface Bar { | |
| 40 int m(Integer i) throws Exception; | |
| 41 } | |
| 42 | |
| 43 private static String assertionStr = ""; | |
| 44 | |
| 45 private static void assertTrue(boolean b) { | |
| 46 if(!b) | |
| 47 throw new AssertionError(); | |
| 48 } | |
| 49 | |
| 50 private static void test1(Foo foo) { | |
| 51 assertTrue(foo.m(1) == 2); | |
| 52 } | |
| 53 | |
| 54 private static void test2(Bar bar) { | |
| 55 try { | |
| 56 assertTrue(bar.m(1) == 2); | |
| 57 } catch (Exception e){ | |
| 58 assertTrue(false); | |
| 59 } | |
| 60 } | |
| 61 | |
| 62 private static Bar test3(int i) { | |
| 63 switch (i) { | |
| 64 case 0: | |
| 65 return n -> n + 1; | |
| 66 case 1: | |
| 67 return (Integer n) -> 2 * n; | |
| 68 case 2: | |
| 69 return (Integer n) -> {return new Integer(n-1);}; | |
| 70 case 3: | |
| 71 return n -> {throw new Exception();}; | |
| 72 default: | |
| 73 return null; | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 public static void main(String[] args) { | |
| 78 | |
| 79 //assign: | |
| 80 Foo foo = (int n) -> n + 1; //explicit type and boxing | |
| 81 assertTrue(foo.m(1) == 2); | |
| 82 | |
| 83 foo = n -> n + 1; //type inferrred and boxing | |
| 84 assertTrue(foo.m(1) == 2); | |
| 85 | |
| 86 Bar bar = (Integer n) -> n + 1; //explicit type and unboxing | |
| 87 try { | |
| 88 assertTrue(bar.m(1) == 2); | |
| 89 } catch (Exception e) { | |
| 90 assertTrue(false); | |
| 91 } | |
| 92 | |
| 93 bar = (Integer n) -> new Integer(n+1); //explicit type and unboxing twice | |
| 94 try { | |
| 95 assertTrue(bar.m(1) == 2); | |
| 96 } catch (Exception e) { | |
| 97 assertTrue(false); | |
| 98 } | |
| 99 | |
| 100 bar = n -> n.intValue() + 1; //type inferred | |
| 101 try { | |
| 102 assertTrue(bar.m(1) == 2); | |
| 103 } catch (Exception e) { | |
| 104 assertTrue(false); | |
| 105 } | |
| 106 | |
| 107 bar = n -> n + 1; // type inferred and unboxing | |
| 108 try { | |
| 109 assertTrue(bar.m(1) == 2); | |
| 110 } catch (Exception e) { | |
| 111 assertTrue(false); | |
| 112 } | |
| 113 | |
| 114 //cast: | |
| 115 assertTrue(((Foo)n -> {return n+1;}).m(1) == 2); //statement (instead of expression) in lambda body | |
| 116 try { | |
| 117 assertTrue(((Bar)n -> {return n+1;}).m(1) == 2); //statement in lambda body | |
| 118 } catch (Exception e) { | |
| 119 assertTrue(false); | |
| 120 } | |
| 121 | |
| 122 //method parameter: | |
| 123 test1((int n) -> new Integer(n+1)); //explicit type | |
| 124 test2((Integer n) -> n.intValue() + 1); //explicit type | |
| 125 | |
| 126 //return statement: | |
| 127 bar = test3(0); | |
| 128 try { | |
| 129 assertTrue(bar.m(1) == 2); | |
| 130 } catch (Exception e) { | |
| 131 assertTrue(false); | |
| 132 } | |
| 133 bar = test3(1); | |
| 134 try { | |
| 135 assertTrue(bar.m(3) == 6); | |
| 136 } catch (Exception e) { | |
| 137 assertTrue(false); | |
| 138 } | |
| 139 bar = test3(2); | |
| 140 try { | |
| 141 assertTrue(bar.m(10) == 9); | |
| 142 } catch (Exception e) { | |
| 143 assertTrue(false); | |
| 144 } | |
| 145 bar = test3(3); | |
| 146 try { | |
| 147 bar.m(10); | |
| 148 assertTrue(false); | |
| 149 } catch (Exception e) {} | |
| 150 } | |
| 151 } |
