1 /* 2 * Copyright (c) 2021, 2024, 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 * @summary Test substitutability of inner class and anonymous class that 27 * has the enclosing instance and possibly other captured outer locals 28 * @enablePreview 29 * @run junit/othervm Nest 30 */ 31 32 import jdk.internal.vm.annotation.ImplicitlyConstructible; 33 import org.junit.jupiter.api.Test; 34 import static org.junit.jupiter.api.Assertions.*; 35 public class Nest { 36 static interface I { 37 String toString(); 38 } 39 40 static I of(int value, Object next) { 41 // anonymous class capturing outer locals 42 return new value I() { 43 public String toString() { 44 return value + " -> " + next; 45 } 46 }; 47 } 48 49 @Test 50 public void test1() { 51 assertEquals(Nest.of(1, null), Nest.of(1, null)); 52 assertNotEquals(Nest.of(1, null), Nest.of(2, null)); 53 } 54 55 @Test 56 public void test2() { 57 Outer n = new Outer(1); 58 Outer.Inner inner = n.new Inner(10); 59 Outer n1 = new Outer(1); 60 Outer n2 = new Outer(2); 61 // o1.new Inner(1) == o2.new Inner(1) iff o1 == o2 62 assertEquals(n1.new Inner(10), inner); 63 assertEquals(n2.new Inner(10), new Outer(2).new Inner(10)); 64 } 65 66 @ImplicitlyConstructible 67 value class Outer { 68 final int i; 69 Outer(int i) { 70 this.i = i; 71 } 72 73 @ImplicitlyConstructible 74 value class Inner { 75 final int ic; 76 Inner(int ic) { 77 this.ic = ic; 78 } 79 } 80 } 81 }