Write code (in the main method) that tests all of the methods of the following class: (I have attached a picture of the interface that it implements)

import java.util.NoSuchElementException; public class QueueImpl implements QueueInterface { private Node first; // beginning of queue private Node last; // end of queue private int n; // number of elements in queue private final int max = 100; // maximum number of elements in queue // helper linked list class private static class Node { private Object item; private Node next; } public static void main(String[] args){ } /*initializes an empty queue * */ public QueueImpl() { first = null; last = null; n = 0; } /*returns true if this queue is empty * */ public boolean isEmpty() { return first == null; } /*returns the number of items in this queue * */ public int size() { return n; } @Override public void enqueue(Object newEntry) { if( n public interface Queuelnterface Adds a new entry to the back of this queue. @param newEntry An object to be added. public void enqueuem newEntry): Removes and returns the entry at the front of this queue. @return The object at the front of the queue. @throws Empty ueueException if the queue is empty before the operation. public T dequeue0; Retrieves the entry at the front of this queue. @return The object at the front of the queue. @throws E ueueException if the queue is empty. mptyQ public T getFront0: Detects whether this queue is empty. @return True if the queue is empty, or false otherwise. public boolean isEmpty(), Removes all entries from this queue. public void clearo generates a string containing all data in the queue and returns it public String toString0; end Queuelnterface