How can I remove duplicate elements from an array in Java while preserving the order of the unique entries?

Removing Duplicates from an Array in Java

The task of eliminating duplicate elements from an array while retaining the order of unique entries can be achieved in Java using a clever approach.

One effective solution involves utilizing a Set data structure. Sets are collections that automatically eliminate duplicate elements. The HashSet class is an excellent choice for this scenario.

To leverage this approach, convert your existing array to a HashSet using the Arrays.asList() method:

Set<String> uniqueEmails = new HashSet<>(Arrays.asList(address));

This conversion yields a Set named uniqueEmails that contains only the unique email addresses from the original array, with duplicates removed.

You can then iterate through the Set to print the distinct emails, ensuring that each one is displayed only once.

By employing this simple trick, you can efficiently handle duplicate elimination while preserving the sequential order of unique elements in your array.

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