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  * @compile --enable-preview -source 12 ExpressionSwitchCodeFromJLS.java
  28  * @run main/othervm --enable-preview ExpressionSwitchCodeFromJLS
  29  */
  30 
  31 public class ExpressionSwitchCodeFromJLS {
  32     static void howMany(int k) {
  33         switch (k) {
  34             case 1: System.out.print("one ");
  35             case 2: System.out.print("too ");
  36             case 3: System.out.println("many");
  37         }
  38     }
  39     static void howManyRule(int k) {
  40         switch (k) {
  41             case 1 -> System.out.println("one");
  42             case 2 -> System.out.println("two");
  43             case 3 -> System.out.println("many");
  44         }
  45     }
  46     static void howManyGroup(int k) {
  47         switch (k) {
  48             case 1: System.out.println("one");
  49                 break;  // exit the switch
  50             case 2: System.out.println("two");
  51                 break;  // exit the switch
  52             case 3: System.out.println("many");
  53                 break;  // not needed, but good style
  54         }
  55     }
  56     public static void main(String[] args) {
  57         howMany(3);
  58         howMany(2);
  59         howMany(1);
  60         howManyRule(1);
  61         howManyRule(2);
  62         howManyRule(3);
  63         howManyGroup(1);
  64         howManyGroup(2);
  65         howManyGroup(3);
  66     }
  67 }