Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package common; import java.util.Comparator; import org.apache.commons.lang3.builder.CompareToBuilder; /** * * @author NStokesBeamon */ public class EmployeeByLastName implements Comparator<Employee> { public int compare(Employee o1, Employee o2) { return new CompareToBuilder() .append(o1.getLastName(), o2.getLastName()).toComparison(); } }