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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. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		B b = new C();
  13. 		b.methodWhichCallsMethodOnInterface();
  14. 	}
  15. }
  16.  
  17. interface A{
  18.     default public void method1(){
  19.         System.out.println("method1 printing from interface A");
  20.     }
  21.     default public void method2(){
  22.          method1(); // note that method1() is overriden in class C.
  23.                     // which one should be called? from A or C?
  24.     }
  25. }
  26.  
  27. interface B extends A{
  28.     void methodWhichCallsMethodOnInterface();
  29. }
  30.  
  31. class C implements B{
  32.     @Override 
  33.     public void method1(){
  34.         System.out.println("method1 printing from class C");
  35.     }
  36.  
  37.     @Override
  38.     public void methodWhichCallsMethodOnInterface(){
  39.         method2();
  40.     }
  41. }
Success #stdin #stdout 0.04s 2184192KB
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method1 printing from class C
https://ideone.com/SkuZHS
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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