Queue in java

Java queue

import java.util.*;

Queue<Integer> queue = new LinkedList<Integer>();
// use non-primative types when constructing

// to add a value to the back of queue:
queue.add(7);

// to remove and return front value:
int next = queue.remove();

// to just return front value without removing:
int peek = queue.peek();

Queue in java

queues, //add, remove, peek , size()
    Queue<Integer> q = new LinkedList<>();
	- Unlike stacks, a queue is open at both its ends. (one end enqueue & one end remove data, dequeue) FIFO
	- enqueue() − add (store) an item to the queue. 
	- dequeue() − remove (access) an item from the queue.
	- peek() − Gets the element at the front of the queue without removing it.
	- isfull() − Checks if the queue is full.
	- isempty() − Checks if the queue is empty.
      
      Queue<Integer> queue = new LinkedList<Integer>();
        queue.add(10);
        queue.add(20);
        int a = queue.remove();
        int peek = queue.peek();
        System.out.println(queue + " " + a); //[20] 10

Queue.isempty java

while (!QUEUE.isEmpty()) {
  QUEUE.remove();
 }

Java Queue

The Queue interface is available in java.util package and extends the Collection interface. The queue collection is used to hold the elements about to be processed and provides various operations like the insertion, removal etc. It is an ordered list of objects with its use limited to insert elements at the end of the list and deleting elements from the start of list i.e. it follows the FIFO or the First-In-First-Out principle.

LinkedList, ArrayBlockingQueue and PriorityQueue are the most frequently used implementations.

Source: sites.google.com

Similar codes

-3 votes302 views3 answers
Java String join
Java
1 vote316 views1 answer
Compare numbers in array in java
Java
0 vote326 views2 answers
Android Execution failed for task ':app:processReleaseManifest' Could not get unknown property 'manifestOutputDirectory' for task
Java
0 vote321 views1 answer
Arraylist how to add at 0 java
Java
0 vote321 views1 answer
Spring boot bean configuration
Java
1 vote324 views1 answer
Localdatetime now + hours
Java
0 vote314 views1 answer
Javac celar
Java
0 vote308 views1 answer
Bucle for java
Java
1 vote302 views1 answer
Java date with T
Java
0 vote335 views3 answers
Power of a number in java
Java