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 Check fall through in switch expressions. 28 * @compile ExpressionSwitchFallThrough1.java 29 * @run main ExpressionSwitchFallThrough1 30 */ 31 32 import java.util.Objects; 33 34 public class ExpressionSwitchFallThrough1 { 35 public static void main(String... args) { 36 new ExpressionSwitchFallThrough1().test(); 37 } 38 39 private void test() { 40 assertEquals("01", printExprFallThrough(0)); 41 assertEquals("1", printExprFallThrough(1)); 42 assertEquals("other", printExprFallThrough(3)); 43 assertEquals("01", printStatementFallThrough(0)); 44 assertEquals("1", printStatementFallThrough(1)); 45 assertEquals("other", printStatementFallThrough(3)); 46 } 47 48 private String printExprFallThrough(Integer p) { 49 String result = ""; 50 return switch (p) { 51 case 0: result += "0"; 52 case 1: result += "1"; 53 yield result; 54 default: yield "other"; 55 }; 56 } 57 58 private String printStatementFallThrough(Integer p) { 59 String result = ""; 60 switch (p) { 61 case 0: result += "0"; 62 case 1: result += "1"; 63 break; 64 default: result = "other"; 65 break; 66 } 67 return result; 68 } 69 70 private static void assertEquals(Object expected, Object actual) { 71 if (!Objects.equals(actual, expected)) { 72 throw new AssertionError("Unexpected result: " + actual + ", expected: " + expected); 73 } 74 } 75 }