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  1. import java.util.HashMap;
  2. import java.util.Map;
  3.  
  4.  
  5. public class Main {
  6.  
  7. 	public static void main(String[] args) throws Exception {
  8. 		final int[][] dataTable = new int[][] {
  9. 				new int[] {0, 1, 2, 1},
  10. 				new int[] {0, 1, 3, 1},
  11. 				new int[] {0, 1, 2, 2},
  12. 				new int[] {0, 1, 2, 0}
  13. 		};
  14.  
  15. 		final Map<Integer, Integer> map = new HashMap<Integer, Integer> ();
  16. 		for (int i = 0; i < 4; i++) {
  17. 			for (int j = 0; j < 4; j++) {
  18. 				final int value = dataTable[i][j];
  19. 				final Integer currentCount = map.get(value);
  20. 				final Integer newCount;
  21. 				if (currentCount == null) {
  22. 					newCount = 1;
  23. 				}
  24. 				else {
  25. 					newCount = currentCount + 1;
  26. 				}
  27.  
  28. 				map.put (value, newCount);
  29. 			}
  30. 		}
  31.  
  32. 		for (final Map.Entry<Integer, Integer> entry : map.entrySet()) {
  33. 			System.out.println(String.format ("The number %d repeats %d times", entry.getKey(), entry.getValue()));
  34. 		}
  35.     }	
  36. }
  37.  
Success #stdin #stdout 0.07s 215552KB
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Standard input is empty
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The number 0 repeats 5 times
The number 1 repeats 6 times
The number 2 repeats 4 times
The number 3 repeats 1 times
https://ideone.com/9GWgg9
language:
Java (12.0.1)
created:
12 years ago
visibility:
public

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