implement Queue in Java

/*Java Program to implement a queue in an employee structure.*/

import java.util.LinkedList;

class GenQueue {
 private LinkedList list = new LinkedList();
 public void enqueue(E item) {
 list.addLast(item);
 }
 public E dequeue() {
 return list.poll();
 }
 public boolean hasItems() {
 return !list.isEmpty();
 }
 public int size() {
 return list.size();
 }
 public void addItems(GenQueue q) {
 while (q.hasItems())
 list.addLast(q.dequeue());
 }
}

public class GenQueueTest {
 public static void main(String[] args) {
 GenQueue empList;
 empList = new GenQueue();
 GenQueue hList;
 hList = new GenQueue();
 hList.enqueue(new HourlyEmployee("T", "D"));
 hList.enqueue(new HourlyEmployee("G", "B"));
 hList.enqueue(new HourlyEmployee("F", "S"));
 empList.addItems(hList);
 System.out.println("The employees' names are:");
 while (empList.hasItems()) {
 Employee emp = empList.dequeue();
 System.out.println(emp.firstName + " " 
 + emp.lastName);
 }
 }
}

class Employee {
 public String lastName;
 public String firstName;
 public Employee() {
 }
 public Employee(String last, String first) {
 this.lastName = last;
 this.firstName = first;
 }
 public String toString() {
 return firstName + " " + lastName;
 }
}

class HourlyEmployee extends Employee {
 public double hourlyRate;
 public HourlyEmployee(String last, String first) {
 super(last, first);
 }
}

Output

The employees' name are:
T D
G B
F S

implement Queue in Java