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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. import java.util.stream.*;
  7.  
  8. /* Name of the class has to be "Main" only if the class is public. */
  9. class Ideone
  10. {
  11. 	public static void main (String[] args) throws java.lang.Exception
  12. 	{
  13. 		Set<String> A_Set = new HashSet<>(Arrays.asList("1111", "2222", "5555"));
  14.         Set<String> B_Set = new HashSet<>(Arrays.asList("3333", "4444"));
  15.         Set<String> C_Set = new HashSet<>(Arrays.asList("6666"));
  16.         Set<String> D_Set = new HashSet<>(Arrays.asList("2222", "5555", "6666"));
  17.  
  18.         Map<String, Set<String>> values = new HashMap<>();
  19.         values.put("A", A_Set);
  20.         values.put("B", B_Set);
  21.         values.put("C", C_Set);
  22.         values.put("D", D_Set);
  23.  
  24.         Map<String, List<Boolean>> exists = values.values()
  25.                 .stream()
  26.                 .flatMap(Set::stream)
  27.                 .distinct()
  28.                 .collect(Collectors.toMap(v -> v, v -> Stream.of("A", "B", "C", "D")
  29.                         .map(k -> values.get(k).contains(v))
  30.                         .collect(Collectors.toList())));
  31.  
  32. 		System.out.println(exists);
  33. 	}
  34. }
Success #stdin #stdout 0.15s 2184192KB
comments (?)
stdin 
Standard input is empty
stdout 
{3333=[false, true, false, false], 2222=[true, false, false, true], 1111=[true, false, false, false], 4444=[false, true, false, false], 5555=[true, false, false, true], 6666=[false, false, true, true]}
https://ideone.com/mgQ6I1
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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