Example: SortWithCustomComparator in Java

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// SortWithCustomComparator
import java.util.Arrays;
import java.util.Comparator;

// Main class containing the entry point of the program
public class Main {
    public static void main(String[] args) {
        // Step 1: Declare and initialize an Integer array
        Integer[] numbers = {5, 1, 9, 3, 7};
        System.out.println("Original array: " + Arrays.toString(numbers));

        // Step 2: Define a custom Comparator using a lambda expression for descending order
        // (a, b) -> b.compareTo(a) means: if b is greater than a, b comes first
        Comparator<Integer> descendingComparator = (a, b) -> b.compareTo(a);

        // Step 3: Sort the array using the custom comparator
        Arrays.sort(numbers, descendingComparator);

        // Step 4: Print the array after sorting
        System.out.println("Array sorted descending: " + Arrays.toString(numbers));
    }
}