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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votes
1 answer
LinkedHashMap with values as a vector being overwritten
When I wrote this piece of code due to the pnValue.clear(); the output I was getting was null values for the keys. So I read somewhere that adding values of one map to the other is a mere reference to the original map and one has to use the clone()…
serendipity
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votes
1 answer
How to multiply two values with the same key name from different linkedHashMaps?
I have two linkedHashmaps which are the same length with the same key names but the values are different. for example :
Map map1= new LinkedHashMap();
map1.put("A", 2.3);
map1.put("B", 6.1);
map1.put("C",…
Newbie2015Giant
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votes
1 answer
LinkedHashMap serialization/deserialization
I have a
Map map = new LinkedHashMap>();
I was added elements in this order :
map.put(32,List Of SomeObjects);
map.put(2,List Of SomeObjects);
map.put(3,List Of SomeObjects);
after invoking this…
Chala
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votes
2 answers
Move Selected elements of a Map up or down
I am trying to modify a list of elements in a Map by moving the selected items up or down. My idea is to remember the elements next to selected items. Because the elements are in a map, I find it much difficult to do it though I use a LinkedHashMap…
Narayana Nagireddi
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-2
votes
2 answers
comparator for LinkedHashMap
i am making a program to read data from excel files and store them in tables. But since I am new to Comparators in Java i have difficulties in making one of them. Here is my issue, I have managed to read all the data from excel files as a string and…
dedmar
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votes
1 answer
Convert a HashMap to JSON String using only built-in methods with Java 8
I have a json options
options = {
"access": "public"
}
Have made it in java using Hashmap, as shown below:
Map options = new LinkedHashMap();
options.put("access", "public");
Now I want to convert this to json…
himan
- 19
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votes
1 answer
I'm not getting the correct key for the value in my code using LinkedHashMap
Hi so I'm stuck here please if someone could help me please I try to explain here the best I can.
Code is working fine but it's false.
So I highlighted down (in bold) in the example where the problem is and commented in yellow what should be right…
devy
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votes
1 answer
How to put String and Integer elements in LinkedHashMap with IntStream?
I am new to LinkedHashMap and I want to put elements in my Map with IntStream instead of filter.put("1", 1)... Is there any way to do it?
private Map filter = new LinkedHashMap<>();
@PostConstruct
public void…
user6941415
-3
votes
2 answers
Greedy algorithm broken implementation
I'm trying to implement a greedy algorithm below, So I'm trying to follow the gist of the algorithm details, but I'm getting an error at my IF statement: java.lang.IndexOutOfBoundsException: Index: 4, Size: 4
Does anyone know if the below method…
Josh123
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votes
1 answer
Iterating over a key set of a LinkedHashMap
is it possible to retrieve the next (next, as in the next key value which has been inserted) key value of a LinkedHashMap?
E.g. the current key value is 2 and the next key value is 4. I want to use the value of the next key without setting my…
optional
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-4
votes
2 answers
LinkedHashMap searching
I have a class
class polygon
{
private String name;
private int quantity;
// default constructor
private polygon()
{ }
public String get name() {
return name;
}
public void setname(String name) {
…
H'H
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-5
votes
1 answer
TreeMap and LinkedHashMap classes
I found a Java question J couldn't understand what should be answer
The TreeMap and LinkedHashMap classes:
enable iteration of a map's entries based on the insertion order of elements only.
enable iteration of a map's entries based on natural…
SidJj
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votes
6 answers
NullPointerException in LinkedHashMap
I'm creating a game. When I'm reading a LinkedHashMap, it gives me an NPE.
I fill LinkedHashMap hm like this:
for (String s : line.split("")) {
if (s.contains("*")) {
hm.put(new Coordinates(xa-32, ya), "gray");
} else if…
Zygimantas
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