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  1. import java.util.*;
  2.  
  3. interface A { void x(); }
  4. class B implements A { public void x(){} public void y(){} }
  5. class C extends B {public void x(){} }
  6. public class Main {
  7. 	public static void main(String[] args) {
  8. 		List<A> list = new ArrayList<A>();
  9. 		list.add(new B());
  10. 		list.add(new C());
  11. 		for(A a : list) {
  12. 			a.x();
  13. 			a.y(); 
  14. 		}
  15. 	}
  16. }
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin 
Standard input is empty
compilation info 
Main.java:13: cannot find symbol
symbol  : method y()
location: interface A
			a.y(); 
			 ^
1 error
stdout 
Standard output is empty
https://ideone.com/MrCcm
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
public

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