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

import java.io.File;
import org.apache.commons.io.filefilter.EmptyFileFilter;

public class EmptyFileFilterExample {
    public static void main(String[] args) {
        // Create an EmptyFileFilter that only accepts empty files
        EmptyFileFilter emptyFileFilter = EmptyFileFilter.EMPTY;

        // Use the filter to list all empty files in the current directory
        File dir = new File(".");
        File[] files = dir.listFiles(emptyFileFilter);
        for (File file : files) {
            System.out.println(file.getName());
        }
    }
}

In this example, we create an instance of EmptyFileFilter by calling the EmptyFileFilter.EMPTY static field.

Then we use the filter to list all empty files in the current directory by calling the listFiles() method on a File object representing the current directory, and passing in the emptyFileFilter object as an argument.

You can also use EmptyFileFilter.NOT_EMPTY to list all files that are not empty.