1 /*
   2  * Copyright (c) 2013, 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
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  23 
  24 /**
  25  * @test
  26  * @bug 8030016
  27  * @summary computeIfAbsent would generate spurious access
  28  */
  29 
  30 import java.util.*;
  31 
  32 public class ComputeIfAbsentAccessOrder {
  33     public static void main(String args[]) throws Throwable {
  34         LinkedHashMap<String,Object> map = new LinkedHashMap<>(2, 0.75f, true);
  35         map.put("first", null);
  36         map.put("second", null);
  37 
  38         map.computeIfAbsent("first", l -> null); // should do nothing
  39 
  40         String key = map.keySet().stream()
  41                 .findFirst()
  42                 .orElseThrow(() -> new RuntimeException("no value"));
  43         if(!"first".equals(key)) {
  44             throw new RuntimeException("not expected value " + "first" + "!=" + key);
  45         }
  46     }
  47 }