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#Java - Code Snippets for '#Collections framework' - 3 code snippet(s) found

 Sample 1. Usage of LinkedHashMap


Map<String,String> linkedhashmap = new LinkedHashMap();
linkedhashmap.put("United States", "Washington");
linkedhashmap.put("Canada", "Ottawa");
linkedhashmap.put("Canada", "Ottawa");
linkedhashmap.put("South Africa", "Pretoria");
linkedhashmap.put("South Africa", "Cape Town");
linkedhashmap.put("South Africa", "Bloemfontein");

System.out.println(linkedhashmap); // Duplicates not allowed as it's a Map, Insertion Order as its linked Map

   Like      Feedback     LinkedHashMap  Map  HashMap  java.util  collections framework


 Sample 2. Print all elements of a ListValuedMap ( Apache Commons ) using forEach and System.out::println

ListValuedMap<String,String> listValuedMap = new ArrayListValuedHashMap();
listValuedMap.put("United States", "Washington");
listValuedMap.put("Canada", "Ottawa");
listValuedMap.put("Canada", "Ottawa");
listValuedMap.put("South Africa", "Pretoria");
listValuedMap.put("South Africa", "Cape Town");
listValuedMap.put("South Africa", "Bloemfontein");

listValuedMap.entries().forEach(System.out::println);

   Like      Feedback     ListValuedMap  apache commons  System.out::println  collections framework   map


 Sample 3. Usage of EnumMap

Map<Country,String> map = new HashMap();
map.put(Country.US, "Washington");
map.put(Country.CANADA, "Ottawa");
map.put(Country.CANADA, "Ottawa");
map.put(Country.SOUTH_AFRICA, "Pretoria");
map.put(Country.SOUTH_AFRICA, "Cape Town");
map.put(Country.SOUTH_AFRICA, "Bloemfontein");

Map<String,String> enumMap = new EnumMap(map); // Prints {CANADA=Ottawa, US=Washington, SOUTH_AFRICA=Bloemfontein}

System.out.println(enumMap); // Duplicates not allowed as it's a Map, Sorted as per order of Enum Declarations

   Like      Feedback     EnumMap  Collections framework  Map  Map with enum keys



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