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  1.  
  2. import java.util.HashMap;
  3. import java.util.Map;
  4. import java.util.ArrayList;
  5.  
  6. /* 
  7. Нам повторы не нужны
  8. */
  9.  
  10. class Solution {
  11.     public static Map<String, String> createMap() {
  12.         //напишите тут ваш код
  13.         Map<String, String> map = new HashMap<>();
  14.         map.put("Сидоров", "Андрей");
  15.         map.put("Петров", "Андрей");
  16.         map.put("Иванов", "Олег");
  17.         map.put("Курочкин", "Дмитрий");
  18.         map.put("Куклачев", "Филлип");
  19.         map.put("Потапенко", "Зинаида");
  20.         map.put("Гагарин", "Алексей");
  21.         map.put("Титов", "Алексей");
  22.         map.put("Немченко", "Татьяна");
  23.         map.put("Кудряшова", "Ирина");
  24.  
  25.         return map;
  26.     }
  27.  
  28.     public static void removeTheFirstNameDuplicates(Map<String, String> map) {
  29.         //напишите тут ваш код
  30.         ArrayList<String> list = new ArrayList<>();
  31.         list.addAll(map.values());
  32.         for (String v : list) {
  33.             System.out.println(v);
  34.         }
  35.         for (String value : list) {
  36.             int count = Collections.frequency(value, list);
  37.  
  38.             if (count > 1) {
  39.             	removeItemFromMapByValue(value);	
  40.             }
  41.         }
  42.         System.out.println("МАГИЯ............");
  43.         for (String v : list) {
  44.             System.out.println(v);
  45.         }
  46.     }
  47.  
  48.     public static void removeItemFromMapByValue(Map<String, String> map, String value) {
  49.         Map<String, String> copy = new HashMap<>(map);
  50.         for (Map.Entry<String, String> pair : copy.entrySet()) {
  51.             if (pair.getValue().equals(value)) {
  52.                 map.remove(pair.getKey());
  53.             }
  54.         }
  55.     }
  56.  
  57.     public static void main(String[] args) {
  58.         removeTheFirstNameDuplicates(createMap());
  59.     }
  60. }
  61.  
Compilation error #stdin compilation error #stdout 0.04s 2184192KB
comments (?)
stdin
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Standard input is empty
compilation info 
Main.java:36: error: cannot find symbol
            int count = Collections.frequency(value, list);
                        ^
  symbol:   variable Collections
  location: class Solution
Main.java:39: error: method removeItemFromMapByValue in class Solution cannot be applied to given types;
            	removeItemFromMapByValue(value);	
            	^
  required: Map<String,String>,String
  found: String
  reason: actual and formal argument lists differ in length
2 errors
stdout
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Standard output is empty
https://ideone.com/3cC2j0
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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