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

-2 votes93 views1 answer
Java stackover
Java
0 vote145 views1 answer
Could not resolve project :app
Java
2 votes140 views1 answer
Java guid
Java
13 votes166 views6 answers
Android java parse date time
Java
1 vote124 views1 answer
Processing draw circle
Java
0 vote145 views1 answer
Android activity read intent extra
Java
0 vote142 views1 answer
Class 'droidninja.filepicker.utils.TabLayoutHelper$2' does not implement interface 'com.google.android.material.tabs.TabLayout$BaseOnTabSelectedListener'
Java
1 vote139 views1 answer
Android studio linearlayout set margin
Java
2 votes135 views1 answer
Add digits java
Java
0 vote149 views1 answer
Java pause
Java