1 /*
   2  * Copyright (c) 2018, 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 switch expressions
  28  * @compile ExpressionSwitchCodeFromJLS.java
  29  * @run main ExpressionSwitchCodeFromJLS
  30  */
  31 
  32 public class ExpressionSwitchCodeFromJLS {
  33     static void howMany(int k) {
  34         switch (k) {
  35             case 1: System.out.print("one ");
  36             case 2: System.out.print("too ");
  37             case 3: System.out.println("many");
  38         }
  39     }
  40     static void howManyRule(int k) {
  41         switch (k) {
  42             case 1 -> System.out.println("one");
  43             case 2 -> System.out.println("two");
  44             case 3 -> System.out.println("many");
  45         }
  46     }
  47     static void howManyGroup(int k) {
  48         switch (k) {
  49             case 1: System.out.println("one");
  50                 break;  // exit the switch
  51             case 2: System.out.println("two");
  52                 break;  // exit the switch
  53             case 3: System.out.println("many");
  54                 break;  // not needed, but good style
  55         }
  56     }
  57     public static void main(String[] args) {
  58         howMany(3);
  59         howMany(2);
  60         howMany(1);
  61         howManyRule(1);
  62         howManyRule(2);
  63         howManyRule(3);
  64         howManyGroup(1);
  65         howManyGroup(2);
  66         howManyGroup(3);
  67     }
  68 }