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Questions - arraylist

Question about java.util.ArrayList realization

I understand that size and capacity are different things. My question is why can I insert at a random location in a newly created array, but cannot do so in a newly created ArrayList. And I understand...
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Stepan Borisov

java

list

arraylist

collections

Votes: 0

Answers: 0

Return the amount of overlapping from arraylist of date intervals

I have the following array named $all_data. Array ( [Chevenez] => Array ( [41.NEwan0] => Array ( [0] => Array ( ...
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Divyesh Jesadiya

php

arrays

arraylist

Votes: 0

Answers: 3

Latest Answer

I found out the way you treat the dates. So there's no need to convert them to the float number. So the question is about algorithms. The following code could be a solution. $all_data = [ 'Cheven...
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Amirreza Noori

Method that corrects the text, inserting spaces after the comma in Java

I want to create a refactorSeparators method that takes an object of the String type as an argument. Method returns the text from the input object corrected so that if there is any a comma or a period...
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Sylwia

java

arrays

string

arraylist

split

Votes: 0

Answers: 3

Latest Answer

You're over-thinking it: String refactorSeparators(String str) { return str.replaceAll("([,.]) ?", "$1 ").trim(); } The regex ([,.]) ? matches a comma or dot optionally follow...
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Bohemian

Hash map of multiple values

I have a hash map of multiple values with the same key. I am looking for selecting a particular value of any index specified in a for loop and return the value. I have done the following but it is giv...
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Agbako

java

dictionary

arraylist

hash

collections

Votes: 0

Answers: 2

Latest Answer

HashMap in Java - implementation of Associative array and can't have two duplicate keys. Maybe you need List<Pair<Integer, Object>>?
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Chuyasov Konstantin

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