Understanding the Comparator Interface

The Comparator interface in Java provides a way to define custom orderings for objects. It allows you to sort collections in an order that may differ from their natural ordering or when the objects do not implement the Comparable interface. By implementing Comparator, you can write flexible and reusable sorting logic that can be passed to methods like Collections.sort().

The Comparator interface is declared in the java.util package. In simplified form, it looks like this:

public interface Comparator<T> {
    int compare(T o1, T o2);
}

• Explanation:
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