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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.Arrays;
  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. 		String[] names = {"123,456",
  14. 				"123,456,789",
  15. 				"456,789,123"};
  16. 		String lookingFor = "456";
  17.  
  18. 		int max = Arrays.stream(names)
  19. 			.mapToInt(name -> name.split(",").length)
  20. 			.max().getAsInt();
  21.  
  22. 		String[] found = Arrays.stream(names)
  23. 		    .filter(name -> arrayContains(name.split(","), lookingFor))
  24. 		    .filter(name -> name.split(",").length == max)
  25. 		    .toArray(String[]::new);
  26.  
  27. 		System.out.println("found:");
  28. 		for(String foundName : found) {
  29. 			System.out.println(foundName);
  30. 		}
  31.  
  32. 	}
  33.  
  34. 	private static boolean arrayContains(Object[] array, Object item) {
  35. 		return Arrays.stream(array).anyMatch(arrayItem -> arrayItem.equals(item));
  36. 	}
  37.  
  38.  
  39. }
Success #stdin #stdout 0.08s 34524KB
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stdin
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Standard input is empty
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found:
123,456,789
456,789,123
https://ideone.com/xW755F
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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