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  1. import java.util.ArrayList;
  2. import java.util.List;
  3.  
  4. class Ideone {
  5. 	public static void main (String[] args) {
  6. 		try {
  7. 			partition(List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11), 2);
  8. 			System.out.println("Should have thrown, but did not");
  9. 		} catch (IllegalArgumentException e) {
  10. 			System.out.println("Threw exception as expepcted");
  11. 		}
  12. 		System.out.println(partition(
  13. 			List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12),
  14. 			2));
  15. 		System.out.println(partition(
  16. 			List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12),
  17. 			3));
  18. 				System.out.println(partition(
  19. 			List.of(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12),
  20. 			4));
  21. 	}
  22.  
  23. 	public static List<List<Integer>> partition(
  24. 			List<Integer> list, 
  25. 			int partitionSize) {
  26. 		final int listSize = list.size();
  27. 		if (listSize % partitionSize != 0) {
  28. 			throw new IllegalArgumentException("The size of the list must be "
  29. 					+ "divisible without remainder by the partition size.");
  30. 		}
  31.  
  32. 		final List<List<Integer>> partition = new ArrayList<>();
  33. 		for (int start = 0; start < listSize; start += partitionSize) {
  34. 			partition.add(list.subList(start, start + partitionSize));
  35. 		}
  36. 		return partition;
  37. 	}
  38. }
Success #stdin #stdout 0.06s 32468KB
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stdin
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Standard input is empty
stdout
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Threw exception as expepcted
[[1, 2], [3, 4], [5, 6], [7, 8], [9, 10], [11, 12]]
[[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]]
[[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12]]
https://ideone.com/tUrtLE
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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