In Java, the Comparator interface offers a method for comparing two objects to sort collections in a customized order, essential when natural ordering falls short.
Sorting collections like Employee objects by different attributes such as salary necessitates the creation of custom Comparators, providing flexibility in data organization.
Creating a custom Comparator involves implementing the Comparator interface and overriding the compare method, which determines the specific sorting logic based on given attributes.
The provided example demonstrates sorting a list of Employee objects by their salary, illustrating how to implement a custom Comparator for tailored data sorting.
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