1 /* 2 * Copyright (c) 2017, 2019, 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 that an switch expression over enum can be exhaustive without default. 28 * @compile --enable-preview -source ${jdk.version} ExhaustiveEnumSwitch.java 29 * @compile ExhaustiveEnumSwitchExtra.java 30 * @run main/othervm --enable-preview ExhaustiveEnumSwitch 31 */ 32 33 public class ExhaustiveEnumSwitch { 34 public static void main(String... args) { 35 new ExhaustiveEnumSwitch().run(); 36 } 37 38 private void run() { 39 ExhaustiveEnumSwitchEnum v = ExhaustiveEnumSwitchEnum.valueOf("F"); 40 41 try { 42 print(v); 43 throw new AssertionError("Expected exception did not occur."); 44 } catch (IncompatibleClassChangeError err) { 45 //ok 46 } 47 } 48 49 private String print(ExhaustiveEnumSwitchEnum t) { 50 return switch (t) { 51 case A -> "A"; 52 case B -> "B"; 53 }; 54 } 55 56 } 57 enum ExhaustiveEnumSwitchEnum { 58 A, B; 59 }