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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	interface I {}
  11.     enum Hoge implements I {
  12.  
  13.         FOO,
  14.  
  15.         BAR {
  16.             @Override
  17.             public String toString() {
  18.                 return "bar";
  19.             }
  20.         }
  21.     }
  22.  
  23.     public static void main(String[] args) {
  24.         log(Hoge.FOO);
  25.         log(Hoge.BAR);
  26.         log(new I(){});
  27.     }
  28.  
  29.     static void log(I constant) {
  30.  
  31.         boolean isEnum = constant instanceof Enum;
  32.  
  33. 		Class<?> clazz = isEnum ? ((Enum<?>)constant).getDeclaringClass() : constant.getClass();
  34.         String fqcn = clazz.getName();
  35.  
  36.         System.out.printf("%s: class=%s, enum=%s%n", constant, fqcn, isEnum);
  37.     }
  38. }
Success #stdin #stdout 0.11s 320512KB
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stdin
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Standard input is empty
stdout
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FOO: class=Ideone$Hoge, enum=true
bar: class=Ideone$Hoge, enum=true
Ideone$1@647e05: class=Ideone$1, enum=false
https://ideone.com/EezxQf
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
secret

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