Search Java Code Snippets

  Help us in improving the repository. Add new snippets through 'Submit Code Snippet ' link.

#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");


   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

Subscribe to Java News and Posts. Get latest updates and posts on Java from
Enter your email address:
Delivered by FeedBurner