fork download 
  1. import java.util.LinkedHashSet;
  2.  
  3.  
  4. class TestSet {
  5.  
  6. 	private static class Internal {
  7. 		public Integer data;
  8.  
  9. 		Internal(Integer data) { this.data = data; }
  10.  
  11. 		@Override
  12. 		public boolean equals(Object other) {
  13. 			return other instanceof Internal && ((Internal)other).data.equals(data);
  14. 		}
  15.  
  16. 		@Override
  17. 		public int hashCode() {
  18. 			return data.hashCode();
  19. 		}
  20.  
  21. 		@Override
  22. 		public String toString() {
  23. 			return data.toString();
  24. 		}
  25.  
  26. 	}
  27.  
  28. 	public static void main(String[] args) {
  29. 		LinkedHashSet<Internal> myCollection = new LinkedHashSet<Internal>();
  30. 		myCollection.add(new Internal(5));
  31. 		myCollection.add(new Internal(3));
  32. 		myCollection.add(new Internal(2));
  33. 		myCollection.add(new Internal(5));
  34. 		myCollection.add(new Internal(2));
  35. 		System.out.println(myCollection);
  36. 	}
  37.  
  38. }
  39.  
Success #stdin #stdout 0.1s 320512KB
comments (?)
stdin 
Standard input is empty
stdout 
[5, 3, 2]
https://ideone.com/Go3nNW
language:
Java (12.0.1)
created:
8 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!