1 /*
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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
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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.
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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22  */
23 
24 /*
25  * @test
26  * @bug 4891872 4989735 4990789 5020490
27  * @summary Check isEnum() method
28  * @author Joseph D. Darcy
29  */
30 
31 import java.lang.annotation.*;
32 
33 public class IsEnum {
34 
test(Class<?> clazz, boolean expected)35     static int test(Class<?> clazz, boolean expected) {
36         int status = (clazz.isEnum() == expected) ? 0 : 1;
37 
38         if (status == 1) {
39             System.err.println("Unexpected enum status for " + clazz);
40         }
41         return status;
42     }
43 
main(String... argv)44     public static void main(String... argv) {
45         int failures = 0;
46 
47         failures += test(IsEnum.class, false);
48         failures += test(String.class, false);
49         failures += test(Enum.class, false);
50         failures += test(EnumPoseur.class, false);
51         failures += test(java.math.RoundingMode.class, true);
52 
53         // Classes in java.lang.annotation
54         failures += test(Annotation.class, false);
55         failures += test(ElementType.class, true);
56         failures += test(Retention.class, false);
57         failures += test(RetentionPolicy.class, true);
58         failures += test(Target.class, false);
59 
60         // A class for a specialized enum constant isn't itself an enum
61         failures += test(SpecialEnum.class, true);
62         failures += test(SpecialEnum.RED.getClass(), false);
63         failures += test(SpecialEnum.GREEN.getClass(), true);
64 
65         if (failures > 0) {
66             throw new RuntimeException("Unexepcted enum status detected.");
67         }
68     }
69 }
70 
71 enum SpecialEnum {
72     RED {
special()73         String special() {return "riding hood";}
74     },
75 
76     GREEN;
77 
special()78     String special() {return "how was my valley";}
79 }
80