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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class A {
  6. 		public int calc (double num){
  7. 			System.out.println("calc A");
  8. 			return (int)(num+1);}
  9. 	}
  10. class B extends A{
  11. 		public int calc (long num){
  12. 			System.out.println("calc B");
  13. 			return (int)(num+2);}
  14. 	}
  15. class C extends B{
  16. 		public int calc (int num){
  17. 			System.out.println("calc C");
  18. 			return num+3;}
  19. 	}
  20. class D extends C{
  21. 		public int calc (float num){
  22. 			System.out.println("calc D");
  23. 			return (int)(num+4);}
  24. 	}
  25.  
  26. class Program{
  27. 		public static void main(String[] args){
  28. 			int num1=10;
  29. 			long num2 = num1;
  30.  
  31. 			Object o1 = num1;
  32. 			System.out.println("num1 Type: "+o1.getClass().getName());
  33.  
  34. 			Object o2 = num2;
  35. 			System.out.println("num2 Type: "+o2.getClass().getName());
  36.  
  37.  
  38. 			A a1=new D();
  39. 			A a2=new D();
  40.  
  41. 			System.out.println("a1 Type: "+a1.getClass().getName());
  42. 			System.out.println("a2 Type: "+a2.getClass().getName());
  43.  
  44. 			int result = a1.calc(num1)+a2.calc(num2);
  45. 			System.out.println("Number: "+result);
  46. 		}
  47. 	}
Success #stdin #stdout 0.11s 320576KB
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Standard input is empty
stdout
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num1 Type: java.lang.Integer
num2 Type: java.lang.Long
a1 Type: D
a2 Type: D
calc A
calc A
Number: 22
https://ideone.com/21RrRn
language:
Java (HotSpot 12)
created:
8 years ago
visibility:
public

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