import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
class Employee implements Comparator{
String name;
String id;
public Employee()
{}
public Employee(String name, String id)
{
this.name=name;
this.id=id;
}
@Override
public int compare(Employee obj1, Employee obj2) {
return obj2.name.compareTo(obj1.name);
}
@Override
public String toString() {
return “{“+”name “+name+”, id ” + id+’}’;
}
}
public class ComparatorUsage {
public static void main(String args[])
{
Employee emp1=new Employee(“sam”,”4″);
Employee emp2=new Employee(“amy”,”2″);
ArrayList<Employee> list=new ArrayList<Employee>();
list.add(emp1);
list.add(emp2);
Collections.sort(list,new Employee());
System.out.println(list);
}

}