Are there any HashMap implementations that expose hook methods for profiling the performance of the Map (average chain length, best / worst / average access time, #rehashes, etc.).
It seems quite common ... |
I often auto-generate an class's hashCode() method using IntelliJ IDEA and typically the method takes the form:
result = 31 * result + ...
My question is what is the purpose of multiplying ... |
I have a list of names, say 8 names: Joe, Bob, Andrew, Bill, Charlie, Sarah, Ann, Victor
The count of names might differ**.
1) What should I use as name list? Hashmap, Vector, ... |
I know about hashing algorithm and hashCode() to convert "key" into an equivalent integer (using some mathematically random expression) that is then compressed and stored into buckets.
But can someone point ... |
HashMap selections = new HashMap<Integer, Float>();
How can i get the Integer key of the 3rd smaller value of Float in all HashMap?
Edit
im using the HashMap for this
for (InflatedRunner runner : prices.getRunners()) ...
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Can any one please guide me to look in depth about the Data Structures used and how is it implemented in the List, Set and Maps of Util Collection page.
In Interviews ... |
I need to very efficiently compare two maps in Clojure/Java, and return the difference as determined by Java's .equals(..), with nil/null equivalent to "not present".
i.e. I am looking for the most ... |
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Assume I am running either of the code snippets below for a list of 1000 Event entries (in allEventsToAggregate). Would I see a performance improvement in the first implementation if the ... |
For one of my applications, the following function has to be called very often. This function takes up a lot of CPU and hence I am wondering if you know how ... |
Right, this is from an older exam which i'm using to prepare my own exam in january. We are given the following method:
public static void Oorspronkelijk()
{
String bs ...
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What is the best way to implement the following scenario in Java:
A sort of key-value pair mechanism, but it looks like this:
param1 + param2 + ...
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I have set of values, an arraylist, and i have to find duplicate keys. One approach is to use 2 loops. and iterate through the list for each value resutling O(n2). ... |
Background
Create a series of SQL JOIN statements using two operands: primary and secondary. The generic form of the JOIN statement is:
JOIN primary primary ON (secondary.id == primary.id)
Problem
The code currently iterates over ... |
What is the difference between HashMap in alt-rt.jar
and rt.jar. I think I see a considerable speed up
in one of my applications, what would be the explanation?
Best Regards
P.S.: I found the two ... |
I have been given an exercise about anagrams and it looked so really easy that I have a doubt I am missing something.
The solution I implemented is the one I ... |
The folowing code takes elements with assistance of a json parser. My problem is, when i find a same value then i want to put an new element (eg "title2") in ... |
So I have a file with arbitrary length with the following format:
@HEADER1
//arbitrary lines of data
@HEADER2
//arbitrary lines of data
....
I will extract each and every header and save it in a Hashmap ... |
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