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
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17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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  *          java.base/java.util:open
31  * @build jdk.testlibrary.OptimalCapacity
32  * @run main ConstantDirectoryOptimalCapacity
33  */
34 
35 import jdk.testlibrary.OptimalCapacity;
36 
37 public class ConstantDirectoryOptimalCapacity {
38 
main(String[] args)39     public static void main(String[] args) throws Throwable {
40         test(E1.class);
41         test(E2.class);
42         test(E3.class);
43         test(E4.class);
44         test(E5.class);
45         test(E6.class);
46         test(E7.class);
47         test(E8.class);
48         test(E9.class);
49         test(E10.class);
50         test(E11.class);
51         test(E12.class);
52         test(E13.class);
53         test(E14.class);
54         test(E15.class);
55         test(E16.class);
56         test(E17.class);
57         test(E18.class);
58         test(E19.class);
59         test(E20.class);
60         test(E21.class);
61         test(E22.class);
62         test(E23.class);
63         test(E24.class);
64         test(E25.class);
65         test(E26.class);
66     }
67 
test(Class<? extends Enum> e)68     private static void test(Class<? extends Enum> e) {
69         Enum.valueOf(e, "V0"); // trigger init of enumConstantDirectory
70 
71         int initialCapacity = (int)(e.getEnumConstants().length / 0.75f) + 1;
72         OptimalCapacity.ofHashMap(e.getClass(), e, "enumConstantDirectory",
73             initialCapacity);
74     }
75 
76     enum E1 { V0 }
77     enum E2 { V0, V1 }
78     enum E3 { V0, V1, V2 }
79     enum E4 { V0, V1, V2, V3 }
80     enum E5 { V0, V1, V2, V3, V4 }
81     enum E6 { V0, V1, V2, V3, V4, V5 }
82     enum E7 { V0, V1, V2, V3, V4, V5, V6 }
83     enum E8 { V0, V1, V2, V3, V4, V5, V6, V7 }
84     enum E9 { V0, V1, V2, V3, V4, V5, V6, V7, V8 }
85     enum E10 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9 }
86     enum E11 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10 }
87     enum E12 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11 }
88     enum E13 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12 }
89     enum E14 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13 }
90     enum E15 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
91                V14 }
92     enum E16 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
93                V14, V15 }
94     enum E17 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
95                V14, V15, V16 }
96     enum E18 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
97                V14, V15, V16, V17 }
98     enum E19 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
99                V14, V15, V16, V17, V18 }
100     enum E20 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
101                V14, V15, V16, V17, V18, V19 }
102     enum E21 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
103                V14, V15, V16, V17, V18, V19, V20 }
104     enum E22 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
105                V14, V15, V16, V17, V18, V19, V20, V21 }
106     enum E23 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
107                V14, V15, V16, V17, V18, V19, V20, V21, V22 }
108     enum E24 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
109                V14, V15, V16, V17, V18, V19, V20, V21, V22, V23 }
110     enum E25 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
111                V14, V15, V16, V17, V18, V19, V20, V21, V22, V23, V24 }
112     enum E26 { V0, V1, V2, V3, V4, V5, V6, V7, V8, V9, V10, V11, V12, V13,
113                V14, V15, V16, V17, V18, V19, V20, V21, V22, V23, V24, V25 }
114 }
115