linkedhashmap Questions

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After reading the documentation for LinkedHashMap (and having used it several times), I'm still not clear about one of its properties. Is the iteration order for a LinkedHashMap: the same as inser...
Dewittdewlap asked 14/1, 2013 at 20:27

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What are the practical scenario for choosing among the linkedhashmap and hashmap? I have gone through working of each and come to the conclusion that linkedhashmap maintains the order of insertion ...
Greenlaw asked 29/10, 2014 at 5:7

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I have an ordered LinkedHashMap and i want to add element at specific index , say at first place or last place in the map. How can i add element in LinkedHashMap at an specific position? Even if I...
Diarthrosis asked 6/10, 2011 at 20:1

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How can you sort a LinkedHashMap using the value ? Is there a way to insert entries into a LinkedHashMap so that they are inserted in order based on their value ?
Antoinetteanton asked 24/11, 2014 at 21:41

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I have used LinkedHashMap because it is important the order in which keys entered in the map. But now I want to get the value of key in the first place (the first entered entry) or the last. Shou...
Noctiluca asked 20/12, 2009 at 17:54

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I want to collect the stream to a LinkedHashMap<String, Object>. I have a JSON resource that is stored in LinkedHashMap<String, Object> resources. Then I filter out JSON elements by st...
Helotry asked 24/10, 2018 at 17:55

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I have a LinkedHashMap: LinkedHashMap<String, RecordItemElement> that I need to iterate through from a given key's position, backwards. So if I was given the 10th item's key, I'd need iter...
Qualifier asked 24/8, 2011 at 5:33

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I've got an application that stores some data in DynamoDB using Jackson to marshall my complex object into a JSON. For example the object I'm marshalling might look like this: private String aSt...
Barbusse asked 15/3, 2013 at 11:3

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I'm Workin with Mongo using Jongo, when I do a query I receive a LinkedHashMap as result. Iterator one = (Iterator) friends.find(query).projection("{_id:0}").as(Object.class); while (one.hasNext()...
Subterranean asked 4/4, 2014 at 18:38

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I wonder if there is a counterpart to java.util.LinkedHashMap in .NET? (ie. the elements are (re)ordered automatically if I access an element. (boolean accessOrder) ).
Regelate asked 28/1, 2009 at 8:58

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I had a need for having Key/Value pairs in the order of my insertion, so I opted to use LinkedHashMap over HashMap. But I need to convert the LinkedHashMap into a JSON String where the order in the...
Glandule asked 7/4, 2015 at 12:11

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I want send LinkedHashMap to another Intent. But I don't known what method for extras is allowable. Bundle extras = getIntent().getExtras(); LinkedHashMap<Integer, String[]> listItems = ext...
Mediant asked 12/11, 2010 at 11:16

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What is the difference between LRU and LFU cache implementations? I know that LRU can be implemented using LinkedHashMap. But how to implement LFU cache?
Comment asked 20/7, 2013 at 6:49

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I have a LinkedHashMap (called info) that contains name/age (string/int) pairs. How can I get the position of the key/value if I input the key? For example, if my LinkedHashMap looked like this {bo...
Petigny asked 30/4, 2012 at 16:40

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I was trying to implement a LRU cache using LinkedHashMap. In the documentation of LinkedHashMap (http://docs.oracle.com/javase/7/docs/api/java/util/LinkedHashMap.html), it says: Note that insert...
Mcspadden asked 15/12, 2014 at 0:33

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I have a Java program that I want to convert it to C++. So, there is a Linkedhashmap data structure used in the Java code and I want to convert it to C++. Is there an equivalent datatype for Linked...
Maclaine asked 6/2, 2017 at 16:1

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I have a problem that is really kind of a general programming question, but my implementation is in Java, so I will provide my examples that way I have a class like this: public class Foo { Linked...

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I have a LinkedHashMap of <String, List<T>>. I am building the Map, so maybe there is a better approach to organizing all the data. I am trying to get the keys that have a common list,...
Meld asked 21/7, 2018 at 15:53

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Is there any performance difference between HashMap and LinkedHashMap for traversal through values() function?
Albano asked 21/10, 2012 at 14:9

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I need to implement a structure in Java that is a key-value list (of types Integer-String) and I want to shuffle it. Basically, I would like to do something like that. public LinkedHashMap<In...
Hemipode asked 13/9, 2013 at 8:51

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I am in need of a Generic collection that is somewhere in between a Dictionary and LinkedList. I want to be able to: Access elements by key Access previous and next elements I've taken a look a...
Curriculum asked 27/10, 2011 at 0:21

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I am reading LinkedHashMap source code in JDK 11 and I found a piece of dead code(I'm not sure) As we all know, LinkedHashMap use a doubly linked list to preserve the order of all the elements.It ...
Madelon asked 6/5, 2020 at 11:52

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How can you shrink a LinkedHashMap? I overrode the removeEldestEntry method, but this method is only called once when a new value is inserted. So there is no change of making the map smaller this w...
Dugger asked 30/8, 2011 at 21:41

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I'm pretty new to the Java World (since I'm writing primary in C/C++). I'm using maps in my apps. Since java.util.Map is abstract I need to instantiate it's implementation. Usually I use HashMap li...
Aludel asked 20/12, 2012 at 14:18

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I get data something like {"Employee 1 of ABC", "ABCX"}, {"Employee 2 of ABC", "ABCY"}, {"Employee 3 of ABC", "ABCZ"} from database through a RefCursor. I have a case where I need to preser...
Navarro asked 29/9, 2015 at 19:51

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