The Apache Commons IO library is a collection of utility classes for working with files, streams, and other I/O-related tasks. The MathUtils class is not a part of this library.

Here is an example of how to use some of the common IO classes:

import org.apache.commons.io.FileUtils;
import java.io.File;
import java.io.IOException;

public class Main {
    public static void main(String[] args) {
        File source = new File("example.txt");
        File destination = new File("example_copy.txt");
        try {
            FileUtils.copyFile(source, destination);
            System.out.println("File copied successfully!");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

This example will copy the file located at the path "example.txt" to a new file located at "example_copy.txt".