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  1.  
  2. import java.util.*;
  3.  
  4. public class Main {
  5.     static class Klasemen {
  6.         private Map<String, Integer> poin = new LinkedHashMap<>();
  7.  
  8.         public Klasemen(String[] klub) {
  9.             for (String nama : klub) {
  10.                 poin.put(nama, 0);
  11.             }
  12.         }
  13.  
  14.         public void catatPermainan(String klubKandang,
  15.                                    String klubTandang,
  16.                                    String skor) {
  17.             String[] hasil = skor.split(":");
  18.             int skorKandang = Integer.parseInt(hasil[0]);
  19.             int skorTandang = Integer.parseInt(hasil[1]);
  20.  
  21.             if (!poin.containsKey(klubKandang) ||
  22.                 !poin.containsKey(klubTandang)) {
  23.                 return;
  24.             }
  25.  
  26.             if (skorKandang > skorTandang) {
  27.                 poin.put(klubKandang, poin.get(klubKandang) + 3);
  28.             } else if (skorKandang < skorTandang) {
  29.                 poin.put(klubTandang, poin.get(klubTandang) + 3);
  30.             } else {
  31.                 poin.put(klubKandang, poin.get(klubKandang) + 1);
  32.                 poin.put(klubTandang, poin.get(klubTandang) + 1);
  33.             }
  34.         }
  35.  
  36.         public Map<String, Integer> cetakKlasemen() {
  37.             List<Map.Entry<String, Integer>> daftar =
  38.                 new ArrayList<>(poin.entrySet());
  39.  
  40.             daftar.sort((a, b) ->
  41.                 Integer.compare(b.getValue(), a.getValue()));
  42.  
  43.             Map<String, Integer> hasil = new LinkedHashMap<>();
  44.             for (Map.Entry<String, Integer> entri : daftar) {
  45.                 hasil.put(entri.getKey(), entri.getValue());
  46.             }
  47.  
  48.             return hasil;
  49.         }
  50.  
  51.         public String ambilPeringkat(int nomorPeringkat) {
  52.             if (nomorPeringkat < 1 ||
  53.                 nomorPeringkat > poin.size()) {
  54.                 return null;
  55.             }
  56.  
  57.             List<Map.Entry<String, Integer>> daftar =
  58.                 new ArrayList<>(cetakKlasemen().entrySet());
  59.  
  60.             return daftar.get(nomorPeringkat - 1).getKey();
  61.         }
  62.     }
  63.  
  64.     public static void main(String[] args) {
  65.         Klasemen klasemen = new Klasemen(
  66.             new String[]{"Liverpool", "Chelsea", "Arsenal"}
  67.         );
  68.  
  69.         klasemen.catatPermainan("Arsenal", "Liverpool", "2:1");
  70.         klasemen.catatPermainan("Arsenal", "Chelsea", "1:1");
  71.         klasemen.catatPermainan("Chelsea", "Arsenal", "0:3");
  72.         klasemen.catatPermainan("Chelsea", "Liverpool", "3:2");
  73.         klasemen.catatPermainan("Liverpool", "Arsenal", "2:2");
  74.         klasemen.catatPermainan("Liverpool", "Chelsea", "0:0");
  75.  
  76.         System.out.println(klasemen.cetakKlasemen());
  77.         System.out.println(klasemen.ambilPeringkat(2));
  78.     }
  79. }
  80.  
Success #stdin #stdout 0.08s 53472KB
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{Arsenal=8, Chelsea=5, Liverpool=2}
Chelsea
https://ideone.com/fZnu0E
language:
Java (12.0.1)
created:
2 days ago
visibility:
public

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