#Java - Code Snippets for '#Collections framework' - 3 code snippet(s) found |
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Sample 1. Usage of LinkedHashMap | |
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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
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Like Feedback LinkedHashMap Map HashMap java.util collections framework |
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Sample 2. Print all elements of a ListValuedMap ( Apache Commons ) using forEach and System.out::println | |
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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);
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Like Feedback ListValuedMap apache commons System.out::println collections framework map |
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Sample 3. Usage of EnumMap | |
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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
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Like Feedback EnumMap Collections framework Map Map with enum keys |
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