Queue

 Queue    




Demonstration of queue using linked list in JAVA  

package com.company;
import java.util.Queue;
import java.util.LinkedList;
public class Main {

    public static void main(String[] args) {
   // write your code here
        Queue<Integer> q = new LinkedList<>();

        q.add(10);
        q.add(1);
        q.add(8);
        q.add(4);
        q.add(7);
        q.add(89);

        System.out.println("The queue is: " + q);
    }
}
The queue is: [10, 1, 8, 4, 7, 89]

Process finished with exit code 0
Show peak of queue  
package com.company;
import java.util.Queue;
import java.util.LinkedList;
public class Main {

    public static void main(String[] args) {
   // write your code here
        Queue<Integer> q = new LinkedList<>();

        q.add(6);
        q.add(1);
        q.add(8);
        q.add(4);
        q.add(7);
        q.add(89);

        System.out.println("The queue is: " + q);
        int peek = q.peek();
        
        System.out.println(peek);
    }
}
The queue is: [6, 1, 8, 4, 7, 89]
6
vpackage com.company;
import java.util.Queue;
import java.util.LinkedList;
public class Main {

    public static void main(String[] args) {
   // write your code here
        Queue<Integer> q = new LinkedList<>();

        q.add(6);
        q.add(1);
        q.add(8);
        q.add(4);
        q.add(7);
        q.add(89);

        System.out.println("The queue is: " + q);
        int peek = q.peek();

        System.out.println("Front element in queue : " +peek);
        int removeElement = q.remove();//removeElement store the removed element from queue

        System.out.println("After removing :  "+q);
        System.out.println("Element removed : "+removeElement);
    }
}
The queue is: [6, 1, 8, 4, 7, 89]
Front element in queue : 6
After removing :  [1, 8, 4, 7, 89]
Element removed : 6

size of the queue
int size = q.size();
System.out.println("The size of element is : "+size);
The size of element is : 5

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