how to implements an empty queue java
import java.util.*;
public class Main {
public static void main(String[] args) {
//declare a Queue
Queue<String> str_queue = new LinkedList<>();
//initialize the queue with values
str_queue.add("one");
str_queue.add("two");
str_queue.add("three");
str_queue.add("four");
//print the Queue
System.out.println("The Queue contents:" + str_queue);
}
}