LinkedHashMap is a Hash table and linked list implementation of the Map interface in the Java Standard library. This implementation provides a predictable iteration order, in contrast with the unspecified ordering provided by HashMap, which is normally the order in which keys were inserted into the map.
Questions tagged [linkedhashmap]
703 questions
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Accessing nested object in LinkedHashMap after JSON deserialization
I'm trying to access an object in a LinkedHashMap, but I get an InvocationTargetException when I try to do it.
The LinkedHashMap is the result of a conversion from JSON to a series of Java objects using the Gson library. The object 'List' contains…
Tim Kranen
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Memory leak issue in Universal Image Loader
By analyzing with MAT
One instance of "com.nostra13.universalimageloader.core.ImageLoader" loaded by
"dalvik.system.PathClassLoader @ 0x414d28b8" occupies 3,866,808 (26.42%) bytes.
The memory is accumulated in one instance of…
Mihir
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Call a method for the first time and then call it again whenever there is any change in the data
What's the best way to accomplish this problem? I want to call a particular method for the first time when I am running my application but second time it should be called only whenever there is any change. If there is no change then I don't want to…
arsenal
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How to make sure that I am calling a certain method only whenever there is any change in the database?
What's the best way to accomplish this problem? I want to call a particular method for the first time when I am running my application but second time it should be called only whenever there is any change. If there is no change then I don't want to…
AKIWEB
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Datastructure : hashmap vs linkedhashmap vs treemap
I saw there are a lot of questions about the differences between these three. Tell me if I am wrong, but if I sum up what I could read:
Hashmap : will be more efficient in general; O(1) (normal case), O(N) (worst case, only with bad hash…
GermainGum
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Cost of execution of HashMap, LinkedHashMap and ConcurrentHashMap in creation of Map and in fetching of value on the basis of particular key
Language : Java
Project Type : Web (war application)
Requirement : Maintain a Data structure which can contain key and value pair
Description : We have a database table in which we have mapped key, value pair
E.g. I) - Like for Customer…
S.P Singh
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Getting back specific lower bounds value from inputted key in LinkedHashMap
I have an LinkedHashMap that uses the values from a char array as its key adds integers 1 to the size of the char array as its values:
hmConvert = new LinkedHashMap();
for (int m = 0; m < referenceString.length; m++) {
…
David Tunnell
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treemap for ascending ID
i have a program where i have to read data from excel file and store them in a database . I am using LinkedHashmap to read each cell as a string. My excel file contains the above data:
ID NAME SALARY
5 christine 2349000
6 paulina 1000
7 laura…
dedmar
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Java - looping through LinkedhashMap and get the value
I have the following LinkedHashMap in which I put values in the following way:
if (preAuthorizeAnnotation != null) {
requestMappingValues = requestMappingAnnotation.value(); // to get the url value
RequestMethod[] methods =…
Java Questions
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3 answers
Changing object references in Java dynamic Lists or Maps
Considering Java dynamic lists or Maps like LinkedList, LinkedHashMap, TreeMap, etc. I suppose that any object has a reference (next->) to the next object (am I right?). Why there are no ways (e.g., a method) to access these references (the next->)…
aLogic
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Accessing variable in Map by Index
I have a LinkedHashMap with a class as the Key as such:
private final Map list = new LinkedHashMap();
Files is a class consisting of 3 variables:
class Files {
public String file;
public String duration;
public String…
Omid
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ConcurrentModificationException Woes
I have a method test(), in which I am trying to compare two LinkedHashMaps against each other and modify the contents of one of the maps by removing the key/value pair if it is found in both LHM's. I keep getting a ConcurrentModificationException…
ResourceReaper
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synchronization issue on LinkedHashMap
I am confused by one specific point regarding synchronization feature of LinkedHashMap. Here are the related Javadoc where I am confused. My confusion point is, why remove method is special here, which is mentioned by -- "except through the…
Lin Ma
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Replacing an ArrayList item with a Linkedhashmap VALUE
I have a Linkedhashmap called numericValueMap that has the parameters String,String:
{a=1,b=1,c=2,d=3,e=5}
And I have an Arraylist called equation:
{ e, -, a, +, b, -, c, *, d, +, b}
What I want to do is replace the items in the Arraylist with the…
Digitalwolf
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Deleting a selected Item using linked hash map
I have a basket where products are added to and for each product there is a delete button:
Whenever I click the bottom button it deletes the bottom product, the problem is it also deletes the last item when clicked in the top button until the…
DaViDa
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