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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 Program
  9. {
  10.         public static void  FunF(A o)
  11.         {
  12.             o.F();
  13.         }
  14.         public static void FunG(A o)
  15.         {
  16.             o.G();
  17.         }
  18.  
  19.         static void main0(String[] args)
  20.         {
  21.             A a = new A();
  22.             B b = new B();
  23.  
  24.             System.out.print("Fun(a) output: "); FunF(a);
  25.             System.out.print("Fun(b) output: "); FunF(b);
  26.             System.out.print("Fun(a) output: "); FunG(a);
  27.             System.out.print("Fun(b) output: "); FunG(b); 
  28.  
  29.             System.out.print("a.F output: "); a.F();
  30.             System.out.print("a.G output: "); a.G();
  31.             System.out.print("b.F output: "); b.F();
  32.             System.out.print("b.G output: "); b.G();
  33.  
  34.         }
  35.         public static void main(String[] args)
  36.         {
  37.             A a = new B();
  38.  
  39.             System.out.print("Fun(a) output: "); FunF(a);
  40.             System.out.print("Fun(a) output: "); FunG(a);
  41.  
  42.             System.out.print("a.F output: "); a.F();
  43.             System.out.print("a.G output: "); a.G();
  44.  
  45.         }
  46.     }
  47.     class A
  48.     {
  49.         public void F()
  50.         {
  51.             System.out.println("A.F");
  52.         }
  53.  
  54.         public void G()
  55.         {
  56.             System.out.println("A.G");
  57.         }
  58.     }
  59.  
  60.     class B extends A
  61.     {
  62.         public void F()
  63.         {
  64.             System.out.println("B.F");
  65.         }
  66.  
  67.         public void G()
  68.         {
  69.             System.out.println("B.G");
  70.         }
  71.     }
Success #stdin #stdout 0.07s 380224KB
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Standard input is empty
stdout
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Fun(a) output: B.F
Fun(a) output: B.G
a.F output: B.F
a.G output: B.G
https://ideone.com/P2XCaU
language:
Java (12.0.1)
created:
10 years ago
visibility:
public

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