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Java queue linked list11/19/2023 This would be useful if you needed to write a program that used a queue for various operations and wanted to implement that queue by using a linked list.īy assigning the LinkedList to a variable of type List, you can only access the methods in the LinkedList that are available in the List interface, which are normal operations for maintaining a sequence of elements. The difference is in the type of the variable.īy assigning the LinkedList to a variable of type Queue, you can only access the methods in the LinkedList that are available in the Queue interface, which includes support for enqueuing and dequeuing elements. Display data of node pointer until the next node pointer becomes NULL.The two statements you've written each construct a LinkedList object to hold a list of strings, then assign it to a variable.Else, define a node pointer and initialize it with the front.If the queue is empty print “No elements in the queue.”.Check if queue contains at least one element or not.Since we need to iterate over each element of the queue to print it, the time complexity of the print function is O(n), where n = number of nodes in a queue. Print function is used to display the content of the queue. If the queue is empty, then dequeue is not possible.For dequeue, the queue must contain at least one element, else underflow conditions will occur. The dequeue function always removes the first element of the queue. Else make next of rear as new node and rear as a new node.If a queue is empty then, a new node is assigned to the front and rear. ![]()
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