Is ArrayList ordered?
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How to Maintain Insertion Order While Getting Unique Values from ArrayList in Java?ArrayList is a part of collection framework and is present in java.util package. It provides us with dynamic arrays in Java. Though, it may be slower than standard arrays but can be helpful in programs where lots of manipulation in the array is needed. This class is found in java.util package. If we want to maintain the insertion order of the elements, we are supposed to use LinkedHashSet. LinkedHashSet maintains the order in which the elements are inserted. Example 1: Java
Output
Unique values in inserted order
[100, 200, 500, 300, 600]
Example 2:
Java
Output
Our ArrayList
(Raushan:Chamgader)
(Yashdeep:Dopa)
(Shishya:Gorilla)
(Sonika:Chipkali)
(Himanshu:Lalten)
(Sarthak:Nagin)
(Tsering:Battak)
(Abhishek:Liquid)
(Shishya:Gorilla)
(Suraj:Bhindi)
(Sonika:Chipkali)
(Himanshu:Lalten)
(Sarthak:Nagin)
Unique elements in inserted order
(Raushan:Chamgader)
(Yashdeep:Dopa)
(Shishya:Gorilla)
(Sonika:Chipkali)
(Himanshu:Lalten)
(Sarthak:Nagin)
(Tsering:Battak)
(Abhishek:Liquid)
(Suraj:Bhindi)
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Java-ArrayList Java-Collections Technical Scripter 2020 Practice Tags :
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