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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. abstract class A
  8. {
  9.     public void Testme(A other)
  10.     {
  11.         System.out.println("value from this: " + Value() + " value from other: " + other.Value());
  12.     }
  13.  
  14.     abstract protected String Value();
  15. }
  16.  
  17. class B extends A
  18. {
  19.     protected String Value()
  20.     {
  21.         return "B class";
  22.     }
  23. }
  24.  
  25. class C extends A
  26. {
  27.     protected String Value()
  28.     {
  29.         return "C class";
  30.     }
  31. }
  32.  
  33. /* Name of the class has to be "Main" only if the class is public. */
  34. class Program
  35. {
  36. 	public static void main (String[] args) throws java.lang.Exception
  37. 	{
  38. 		B b = new B();
  39. 		C c = new C();
  40. 		b.Testme(c);
  41. 	}
  42. }
Success #stdin #stdout 0.07s 380224KB
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Standard input is empty
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value from this: B class value from other: C class
https://ideone.com/2B3CEq
language:
Java (HotSpot 12)
created:
11 years ago
visibility:
public

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