1 /* 2 * Copyright (c) 2018, 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 8206986 27 * @summary Verify behavior when an intersection type is inferred for switch expression. 28 * @compile --enable-preview -source 12 ExpressionSwitchIntersectionTypes.java 29 * @run main/othervm --enable-preview ExpressionSwitchIntersectionTypes 30 */ 31 32 public class ExpressionSwitchIntersectionTypes<X extends java.io.Serializable & Runnable> { 33 34 void test1(int i, X x) { 35 Runnable r1 = switch (i) { 36 default -> x; 37 }; 38 r1.run(); 39 } 40 41 void test2(int i, X x) { 42 (switch (i) { 43 default -> x; 44 }).run(); 45 } 46 47 public static void main(String[] args) { 48 ExpressionSwitchIntersectionTypes t = new ExpressionSwitchIntersectionTypes(); 49 try { 50 t.test1(0, ""); 51 throw new AssertionError("Expected exception didn't occur."); 52 } catch (ClassCastException ex) { 53 //good 54 } 55 try { 56 t.test2(0, ""); 57 throw new AssertionError("Expected exception didn't occur."); 58 } catch (ClassCastException ex) { 59 //good 60 } 61 } 62 63 }