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 + 1.0f);
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 }