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 8200696

    27  * @summary Initial capacity of Class.enumConstantDirectory is not optimal

    28  * @library /lib/testlibrary

    29  * @modules java.base/java.lang:open

    30  * @build jdk.testlibrary.OptimalCapacity

    31  * @run main ConstantDirectoryOptimalCapacity

    32  */

    33 

    34 import jdk.testlibrary.OptimalCapacity;

    35 

    36 public class ConstantDirectoryOptimalCapacity {

    37 

    38     public static void main(String[] args) throws Throwable {

    39         test(E1.class);

    40         test(E2.class);

    41         test(E3.class);

    42         test(E4.class);

    43         test(E5.class);

    44         test(E6.class);

    45         test(E7.class);

    46         test(E8.class);

    47         test(E9.class);

    48         test(E10.class);

    49         test(E11.class);

    50         test(E12.class);

    51         test(E13.class);

    52         test(E14.class);

    53         test(E15.class);

    54         test(E16.class);

    55         test(E17.class);

    56         test(E18.class);

    57         test(E19.class);

    58         test(E20.class);

    59         test(E21.class);

    60         test(E22.class);

    61         test(E23.class);

    62         test(E24.class);

    63         test(E25.class);

    64         test(E26.class);

    65     }

    66 

    67     private static void test(Class<? extends Enum> e) {

    68         Enum.valueOf(e, "V0"); // trigger init of enumConstantDirectory

    69 

    70         int initialCapacity = (int)(e.getEnumConstants().length / 0.75f) + 1;

    71         OptimalCapacity.ofHashMap(e.getClass(), e, "enumConstantDirectory",

    72             initialCapacity);

    73     }

    74 

    75     enum E1 { V0 }

    76     enum E2 { V0, V1 }

    77     enum E3 { V0, V1, V2 }

    78     enum E4 { V0, V1, V2, V3 }

    79     enum E5 { V0, V1, V2, V3, V4 }

    80     enum E6 { V0, V1, V2, V3, V4, V5 }

    81     enum E7 { V0, V1, V2, V3, V4, V5, V6 }

    82     enum E8 { V0, V1, V2, V3, V4, V5, V6, V7 }

    83     enum E9 { V0, V1, V2, V3, V4, V5, V6, V7, V8 }

    84     enum E10 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9 }

    85     enum E11 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10 }

    86     enum E12 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11 }

    87     enum E13 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12 }

    88     enum E14 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13 }

    89     enum E15 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

    90                V14 }

    91     enum E16 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

    92                V14, V15 }

    93     enum E17 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

    94                V14, V15, V16 }

    95     enum E18 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

    96                V14, V15, V16, V17 }

    97     enum E19 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

    98                V14, V15, V16, V17, V18 }

    99     enum E20 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

   100                V14, V15, V16, V17, V18, V19 }

   101     enum E21 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

   102                V14, V15, V16, V17, V18, V19, V20 }

   103     enum E22 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

   104                V14, V15, V16, V17, V18, V19, V20, V21 }

   105     enum E23 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

   106                V14, V15, V16, V17, V18, V19, V20, V21, V22 }

   107     enum E24 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

   108                V14, V15, V16, V17, V18, V19, V20, V21, V22, V23 }

   109     enum E25 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

   110                V14, V15, V16, V17, V18, V19, V20, V21, V22, V23, V24 }

   111     enum E26 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,

   112                V14, V15, V16, V17, V18, V19, V20, V21, V22, V23, V24, V25 }

   113 }