Here is an example of how to use the NameFileComparator class from the org.apache.commons.io package in Java:

import java.io.File;
import org.apache.commons.io.comparator.NameFileComparator;

public class Example {
    public static void main(String[] args) {
        File[] files = ...
        Arrays.sort(files, NameFileComparator.NAME_COMPARATOR);
    }
}

In this example, we are sorting an array of File objects using the NameFileComparator.NAME_COMPARATOR constant. This comparator sorts files based on their names. The Arrays.sort() method is used to sort the files array using the NameFileComparator.NAME_COMPARATOR constant as the comparator.

You can also pass a boolean value as argument to the NameFileComparator constructor indicating whether the sort should be done in reverse order. For example:

NameFileComparator comparator = new NameFileComparator(true);

This will sort the files in reverse order of their names.

It's worth noting that the NameFileComparator class is an extension of AbstractFileComparator class, that uses the File class's natural ordering to compares files and sorts them based on their names, in the order specified in the constructor.