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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. static class IFace<T> {}
  11.  
  12. protected static <C extends IFace<?>> Class<C> getClazz() {
  13. return (Class<C>) (Class) IFace.class;
  14. }
  15.  
  16. public static void main (String[] args) throws java.lang.Exception
  17. {
  18. class Something extends IFace<String> {}
  19. Class<Something> clazz = getClazz();
  20. Something sth = clazz.newInstance();
  21. }
  22. }
Runtime error #stdin #stdout #stderr 0.04s 4386816KB
stdin
Standard input is empty
stdout
Standard output is empty
stderr
Exception in thread "main" java.lang.ClassCastException: Ideone$IFace cannot be cast to Ideone$1Something
	at Ideone.main(Main.java:20)