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java Programming Glossary: entrysetJava: iterate through HashMap [duplicate] http://stackoverflow.com/questions/1066589/java-iterate-through-hashmap hashmap share improve this question Iterate through the entrySet like so public static void printMap Map mp Iterator it mp.entrySet.. like so public static void printMap Map mp Iterator it mp.entrySet .iterator while it.hasNext Map.Entry pairs Map.Entry it.next..
Java Hashmap: How to get key from value? http://stackoverflow.com/questions/1383797/java-hashmap-how-to-get-key-from-value is easier said than done. Once you can ensure that use the entrySet method to obtain the set of entries mappings in the Map. Once..
Struts2: Updating the values of a “List Of Objects” inside a Map http://stackoverflow.com/questions/15006868/struts2-updating-the-values-of-a-list-of-objects-inside-a-map TreeMap K V id 972 comparator null descendingMap null entrySet TreeMap EntrySet id 979 keySet null modCount 1 navigableKeySet.. for Map.Entry String ObjectCList entry testTreeMap.entrySet System.out.println entry.getKey entry.getValue return SUCCESS..
Explain synchronization of collections when iterators are used? http://stackoverflow.com/questions/1775717/explain-synchronization-of-collections-when-iterators-are-used dosomething1 for Iterator Map.Entry Integer Integer i map.entrySet .iterator i.hasNext do something void dosomething2 for Iterator.. dosomething2 for Iterator Map.Entry Integer Integer i map.entrySet .iterator i.hasNext do something and remove it i.remove void.. do its synchronization especially when it is using entrySet which would seem to also require synchronization What happens..
Bounded-wildcard related compiler error http://stackoverflow.com/questions/18907262/bounded-wildcard-related-compiler-error m null Set Map.Entry extends String extends Integer s m.entrySet The compiler complains with the error message Type mismatch.. in this old Apache thread The problem is that the entrySet method is returning a Set Map.Entry capture of extends K capture.. that's where you run into trouble because the expression m.entrySet doesn't want to return that but instead a set of entries of..
Why doesn't Java Map extends Collection? http://stackoverflow.com/questions/2651819/why-doesnt-java-map-extends-collection you can already view a Map K V as Set Map.Entries K V via entrySet it doesn't just extend that interface instead. If a Map is a.. useful Map abstraction. But if that's the case then why is entrySet specified by the interface It must be useful somehow and I think.. to Map It can and should keep all the other methods except entrySet which is redundant now java oop collections share improve..
http://stackoverflow.com/questions/2864840/treemap-sort-by-value ab 20 map.put a 5 for Map.Entry String Integer pair map.entrySet System.out.println pair.getKey pair.getValue class byValue.. using an external collection you can always sort Map.entrySet however you wish either by keys values or even a combination.. .compareTo e2.getValue sortedEntries.addAll map.entrySet return sortedEntries Now you can do the following Map String..
How to Maintain order of insertion using collections http://stackoverflow.com/questions/2973751/how-to-maintain-order-of-insertion-using-collections 3 map.put Four 4 for Map.Entry String Integer entry map.entrySet System.out.println entry.getKey entry.getValue The output.. How to keep the order of elements in hashtable Does entrySet in a LinkedHashMap also guarantee order Java Class that implements..
http://stackoverflow.com/questions/3120495/concurrent-set-queue select a head element other than using the backing map's entrySet .iterator .next the result being that the map gets more and..
Is there a shorthand for <fmt:message key=“key” />? http://stackoverflow.com/questions/3174373/is-there-a-shorthand-for-fmtmessage-key-key String key @Override public Set Map.Entry String String entrySet no need to implement this return null share improve this..
Accessing the last entry in a Map http://stackoverflow.com/questions/3527216/accessing-the-last-entry-in-a-map entryList new ArrayList Map.Entry String Integer map.entrySet Entry String Integer lastEntry entryList.get entryList.size.. the above comparator b a List initialized with the Map's entrySet and c the Collections.sort helper method final Map String Integer.. Integer entries new ArrayList Entry String Integer map.entrySet Collections.sort entries new Comparator Entry String Integer..
Performance considerations for keySet() and entrySet() of Map http://stackoverflow.com/questions/3870064/performance-considerations-for-keyset-and-entryset-of-map considerations for keySet and entrySet of Map All Can anyone please let me know exactly what are the.. requiring time proportional to its capacity. HashMap.entrySet The source code for this implementation is available. The implementation.. dictating what will happen when you iterate through an entrySet. It walks through the entire array which is as long as the maps..
How can I iterate over a map of <String, POJO>? http://stackoverflow.com/questions/3995463/how-can-i-iterate-over-a-map-of-string-pojo hashmap pojo share improve this question What about entrySet HashMap String Person hm new HashMap String Person hm.put A.. hm.put E new Person p5 Set Map.Entry String Person set hm.entrySet for Map.Entry String Person me set System.out.println Key me.getKey..
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