--- /dev/null 2013-12-06 10:32:06.871486020 -0800 +++ new/test/java/util/LinkedHashMap/ComputeIfAbsentAccessOrder.java 2013-12-11 21:22:28.275804761 -0800 @@ -0,0 +1,47 @@ +/* + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/** + * @test + * @bug 8030016 + * @summary computeIfAbsent would generate spurious access + */ + +import java.util.*; + +public class ComputeIfAbsentAccessOrder { + public static void main(String args[]) throws Throwable { + LinkedHashMap map = new LinkedHashMap<>(2, 0.75f, true); + map.put("first", null); + map.put("second", null); + + map.computeIfAbsent("first", l -> null); // should do nothing + + String key = map.keySet().stream() + .findFirst() + .orElseThrow(() -> new RuntimeException("no value")); + if(!"first".equals(key)) { + throw new RuntimeException("not expected value " + "first" + "!=" + key); + } + } +}