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What kind of List will automatically eliminate duplicates when they are added.
e.g. for a List if I add 1,2,3,4,5,1,2,3 = the List should just contain just 1,2,3,4,5
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Go to the Design tab ➜ select Subtotals ➜ select Do Not Show Subtotals. What is this? You now have a pivot table that mimics a tabular set of data! Pivot tables only list unique values for items in the Rows area, so this pivot table will automatically remove any duplicates in your data.
The arraylist contains duplicate elements. Here, we have used the LinkedHashSet to create a set. It is because it removes the duplicate elements and maintains insertion order. To learn more, visit Java LinkedHashSet.
If you want to eliminate duplicates, use Set
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