collections Archives - Page 11 of 12

When to use LinkedList over ArrayList in Java?

Summary ArrayList with ArrayDeque are preferable in many more use-cases than LinkedList. If you’re not sure — just start with ArrayList. TLDR, in ArrayList ...

April 8, 2022
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Initialization of an ArrayList in one line

Actually, probably the “best” way to initialize the ArrayList is the method you wrote, as it does not need to create a new ...

April 8, 2022
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Difference between HashSet and HashMap?

They are entirely different constructs. A HashMap is an implementation of Map. A Map maps keys to values. The key look up occurs using the hash. On the ...

April 8, 2022
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Why is there no SortedList in Java?

List iterators guarantee first and foremost that you get the list’s elements in the internal order of the list (aka. insertion order). More specifically ...

April 7, 2022
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Printing HashMap In Java

keySet() only returns a set of keys from your hash map, you should iterate this key set and the get the value from the ...

April 7, 2022
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When its comes to the behavior of ArrayList and HashSet they are completely different classes. ArrayList Does not validate duplicates. get() is O(1) contains() is O(n) but you have fully control over the ...

April 7, 2022
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FIFO based Queue implementations?

April 7, 2022
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