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  1. import java.util.*;
  2.  
  3. public class Main {
  4. 	public static class Klasemen {
  5. 		private static final int POIN_MENANG = 3;
  6. 		private static final int POIN_SERI = 1;
  7. 		private Map<String, Integer> klasemen;
  8.  
  9. 		public Klasemen(List<String> clubs) {
  10. 			klasemen = new HashMap<>();
  11. 			for (String club : clubs) {
  12. 				klasemen.put(club, 0);
  13. 			}
  14. 		}
  15.  
  16. 		public void catatPermainan(String klubKandang, String klubTandang, String skor) {
  17. 			String[] splitSkor = skor.split(":");
  18. 			int skorKandang = Integer.parseInt(splitSkor[0]);
  19. 			int skorTandang = Integer.parseInt(splitSkor[1]);
  20.  
  21. 			if (skorKandang > skorTandang) {
  22. 				klasemen.put(klubKandang, klasemen.get(klubKandang) + POIN_MENANG);
  23. 			} else if (skorKandang < skorTandang) {
  24. 				klasemen.put(klubTandang, klasemen.get(klubTandang) + POIN_MENANG);
  25. 			} else {
  26. 				klasemen.put(klubKandang, klasemen.get(klubKandang) + POIN_SERI);
  27. 				klasemen.put(klubTandang, klasemen.get(klubTandang) + POIN_SERI);
  28. 			}
  29. 		}
  30.  
  31. 		public List<Map.Entry<String, Integer>> cetakKlasemen() {
  32. 			List<Map.Entry<String, Integer>> sorted = new ArrayList<>(klasemen.entrySet());
  33. 			sorted.sort((a, b) -> {
  34. 				int comparison = Integer.compare(b.getValue(), a.getValue());
  35. 				return (comparison != 0) ? comparison : a.getKey().compareTo(b.getKey());
  36. 				});
  37. 			return sorted;
  38. 		}
  39.  
  40. 		public String ambilPeringkat(int nomorPeringkat) {
  41. 			List<Map.Entry<String, Integer>> sorted = cetakKlasemen();
  42. 			if (nomorPeringkat < 1 || nomorPeringkat > sorted.size()) {
  43. 				return null;
  44. 			}
  45. 			return sorted.get(nomorPeringkat - 1).getKey();
  46. 		}
  47. 	}
  48.  
  49. 	public static void main(String[] args) {
  50. 		List<String> clubs = Arrays.asList("Liverpool", "Chelsea", "Arsenal");
  51. 		Klasemen klasemen = new Klasemen(clubs);
  52.  
  53. 		klasemen.catatPermainan("Arsenal", "Liverpool", "2:1");
  54. 		klasemen.catatPermainan("Arsenal", "Chelsea", "1:1");
  55. 		klasemen.catatPermainan("Chelsea", "Arsenal", "0:3");
  56. 		klasemen.catatPermainan("Chelsea", "Liverpool", "3:2");
  57. 		klasemen.catatPermainan("Liverpool", "Arsenal", "2:2");
  58. 		klasemen.catatPermainan("Liverpool", "Chelsea", "0:0");
  59.  
  60. 		// print klasemen
  61. 		for (Map.Entry<String, Integer> entry : klasemen.cetakKlasemen()) {
  62. 			System.out.println(entry.getKey() + " => " + entry.getValue());
  63. 		}
  64.  
  65. 		// print klub pada peringkat 2
  66. 		System.out.println("Peringkat 2: " + klasemen.ambilPeringkat(2));
  67. 	}
  68. }
  69.  
Success #stdin #stdout 0.17s 55940KB
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stdin
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Standard input is empty
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Arsenal => 8
Chelsea => 5
Liverpool => 2
Peringkat 2: Chelsea
https://ideone.com/8ivkuP
language:
Java (HotSpot 12)
created:
16 hours ago
visibility:
public

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