#Java - Code Snippets for '#Apache commons collections'

#Java - Code Snippets for '#Apache commons collections' - 9 code snippet(s) found

Sample 1. Usage of Apache Commons - ArrayListValuedHashMap

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");



System.out.println(listValuedMap); // Values being added to the List and allow even duplicates

_{Like Feedback apache commons apache commons collections ArrayListValuedHashMap ListValuedMap}

Sample 2. Get all Permutations of List Elements using Apache Commons PermutationIterator

List<String> list = new ArrayList();

list.add("Washington");

list.add("Nevada");

list.add("California");



PermutationIterator permIterator = new PermutationIterator((Collection) list);

        

permIterator.forEachRemaining(System.out::print); // prints [Washington, Nevada, California][Washington, California, Nevada][California, Washington, Nevada][California, Nevada, Washington][Nevada, California, Washington][Nevada, Washington, California]

_{Like Feedback Permutations of collection elements Permutations of List elements Apache Commons PermutationIterator Iterator Collections .forEachRemaining System.out::print List ArrayList}

Sample 3. Usage of Apache Commons - HashSetValuedHashMap

SetValuedMap<String,String> setValuedMap = new HashSetValuedHashMap();

setValuedMap.put("United States", "Washington");

setValuedMap.put("Canada", "Ottawa");

setValuedMap.put("Canada", "Ottawa");

setValuedMap.put("South Africa", "Pretoria");

setValuedMap.put("South Africa", "Cape Town");

setValuedMap.put("South Africa", "Bloemfontein");

        

System.out.println(setValuedMap); // Values being added to the Set and hence doesn't allow duplicates

_{Like Feedback apache commons apache commons collections apache commons map HashSetValuedHashMap SetValuedMap}

Sample 4. Make a Map entry read only using Apache Commons UnmodifiableMapEntry

Entry entry = new UnmodifiableMapEntry("Key2", "Value2");

entry.setValue("Value3"); // throws java.lang.UnsupportedOperationException

_{Like Feedback read only map entry UnmodifiableMapEntry Apache commons collections}

Sample 5. 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 6. Count elements of a collection matching a Predicate using Apache Commons IterableUtils

List<String> list = new ArrayList();

list.add("Washington");

list.add("Nevada");

list.add("California");

list.add("New York");

list.add("New Jersey");



// <String> long org.apache.commons.collections4.IterableUtils.countMatches(Iterable<String> input, Predicate<? super String> predicate)

      

System.out.println(IterableUtils.countMatches(list, p->((String)p).startsWith("N")));

_{Like Feedback Apache Commons IterableUtils Apache Commons Predicate Java 8 Count elements of a collection java8}

Sample 7. Usage of Apache Commons CaseInsensitiveMap

Map<String, String> map = new CaseInsensitiveMap<String, String>();

map.put("US", "Washington");

map.put("us", "Washington DC");

        

System.out.println(map); // Prints {us=Washington DC} as Keys are case insensitive

_{Like Feedback CaseInsensitiveMap Map with Case insensitive keys apache commons apache commons collections}

Sample 8. Apache Commons MultiSet Example

MultiSet<String> multiSet = new HashMultiSet(); 

multiSet.add("Albama");

multiSet.add("Albama");

multiSet.add("Albama");

      

System.out.println(multiSet); // Prints [Albama:3]

_{Like Feedback Set with duplicate values MultiSet Apache Commons Collections}

Sample 9. Create an UnmodifiableMultiSet ( Read only set allowing multiple values ) using Apache Commons

MultiSet<String> multiSet = new HashMultiSet(); 

multiSet.add("Albama");

multiSet.add("Albama");

multiSet.add("Albama");



System.out.println(multiSet); // Prints [Albama:3]

        

UnmodifiableMultiSet<String> unmodifiablemultiSet = (UnmodifiableMultiSet<String>) MultiSetUtils.unmodifiableMultiSet(multiSet);



unmodifiablemultiSet.add("Albama"); // throws java.lang.UnsupportedOperationException

_{Like Feedback UnmodifiableMultiSet Apache Commons Collections Set MultiSet}

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