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  1. class Example<E> {
  2.     public static void main(String[] args) {
  3.         try {
  4.             Example<String> e = new Example<String>();
  5.  
  6.             // type is actually Object.class!
  7.             Class<String> type = e.getGenericType();
  8.             System.out.println("type is " + type.getName());
  9.  
  10.             // throws ClassCastException
  11.             String s = type.newInstance();
  12.  
  13.         } catch(Throwable e) {
  14.             e.printStackTrace(System.out);
  15.         }
  16.     }
  17.  
  18.     Class<E> getGenericType() {
  19.         return Example.<E>getClazz();
  20.     }
  21.  
  22.     static <T> Class<T> getClazz(T... param) {
  23.         return (Class<T>) param.getClass().getComponentType();
  24.     }
  25. }
Success #stdin #stdout 0.1s 321280KB
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Standard input is empty
stdout
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type is java.lang.Object
java.lang.ClassCastException: java.lang.Object cannot be cast to java.lang.String
	at Example.main(Main.java:11)
https://ideone.com/DIPNwd
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
secret

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