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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 IFace<T> {}
  11. 	static class Something implements IFace<String> {}
  12.  
  13. 	static class Whatever {
  14. 		protected <C extends IFace<?>> Class<C> getClazz() {
  15. 			return (Class<C>) (Class) IFace.class;
  16. 		}
  17. 	}
  18.  
  19. 	public static void main (String[] args) throws java.lang.Exception
  20. 	{
  21.     	Class<Something> clazz = new Whatever().getClazz();
  22.     	try {
  23.     		Something sth = clazz.newInstance();
  24.     	} catch (Exception e) {
  25.     		e.printStackTrace(System.out);
  26.     	}
  27. 	}
  28. }
Success #stdin #stdout 0.04s 4386816KB
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java.lang.InstantiationException: Ideone$IFace
	at java.lang.Class.newInstance(Class.java:427)
	at Ideone.main(Main.java:23)
Caused by: java.lang.NoSuchMethodException: Ideone$IFace.<init>()
	at java.lang.Class.getConstructor0(Class.java:3082)
	at java.lang.Class.newInstance(Class.java:412)
	... 1 more
https://ideone.com/EaJwVM
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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