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  1. import java.util.*;
  2. import java.lang.*;
  3.  
  4. class Main
  5. {
  6. 	public static void main (String[] args) throws java.lang.Exception
  7. 	{
  8. 		System.out.println("abc");
  9.  
  10. 		Something st1 = new Something(1,2.3);
  11. 		Something st2 = new Something(4,5.6);
  12.  
  13. 		st1.print();
  14. 		st2.print();
  15.  
  16. 		//st1.swap(st2);
  17. 		swap(st1, st2);
  18.  
  19. 		st1.print();
  20. 		st2.print();
  21. 	}
  22.  
  23. 	private static <T extends Swappable> void swap(T a, T b)
  24. 	{
  25. 		a.swap(b);
  26. 	}
  27. }
  28.  
  29. interface Swappable<T extends Swappable>
  30. {
  31. 	public void swap(T other);
  32. }
  33.  
  34. class Something implements Swappable<Something>
  35. {
  36. 	private int i;
  37. 	private double d;
  38.  
  39. 	public Something(int _i, double _d)
  40. 	{
  41. 		this.i = _i;
  42. 		this.d = _d;
  43. 	}
  44.  
  45. 	public void print()
  46. 	{
  47. 		System.out.println("i: " + i + "\r\nd: " + d + "\r\n");
  48. 	}
  49.  
  50. 	public void swap(Something other)
  51. 	{
  52. 		int _i = other.i;
  53. 		double _d = other.d;
  54.  
  55. 		other.i = this.i;
  56. 		other.d = this.d;
  57.  
  58. 		this.i = _i;
  59. 		this.d = _d;
  60. 	}
  61. }
Success #stdin #stdout 0.09s 213440KB
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stdin
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Standard input is empty
stdout
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abc
i: 1
d: 2.3

i: 4
d: 5.6

i: 4
d: 5.6

i: 1
d: 2.3
https://ideone.com/7AUE1
language:
Java (HotSpot 12)
created:
12 years ago
visibility:
public

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