Answers for "min heap implementation java"

Java

max heap java

import java.util.PriorityQueue;

public class MaxHeapWithPriorityQueue {

    public static void main(String args[]) {
        // create priority queue
        PriorityQueue<Integer> prq = new PriorityQueue<>(Comparator.reverseOrder());

        // insert values in the queue
        prq.add(6);
        prq.add(9);
        prq.add(5);
        prq.add(64);
        prq.add(6);

        //print values
        while (!prq.isEmpty()) {
            System.out.print(prq.poll()+" ");
        }
    }

}

Posted by: Guest on August-02-2020

Source

heap in java

In Java PriorityQueue can be used as a Heap.

Min Heap
PriorityQueue<Integer> minHeap = new PriorityQueue<>();


Max Heap:
PriorityQueue<Integer> maxHeap = new PriorityQueue<>(Comparator.reverseOrder());

Posted by: Guest on August-31-2020

use Java NetBeans to write code to implement the list [5, 3, 17, 10, 84, 19, 6, 22, 9] in a Max Heap data structure. For each parent node, display the left and right child of the node.

The Max Heap is 
 PARENT : 52 LEFT CHILD : 21 RIGHT CHILD :23
 PARENT : 21 LEFT CHILD : 15 RIGHT CHILD :13
 PARENT : 23 LEFT CHILD : 7 RIGHT CHILD :16
 PARENT : 15 LEFT CHILD : 5 RIGHT CHILD :9
The max val is 52

Posted by: Guest on October-21-2020

Source

min max heap java

// min heap: PriorityQueue implementation from the JDK
PriorityQueue<Integer> prq = new PriorityQueue<>();

// max heap: PriorityQueue implementation WITH CUSTOM COMPARATOR PASSED
// Method 1: Using Collections (recommended)
PriorityQueue<Integer> prq = new PriorityQueue<>(Collections.reverseOrder());
// Method 2: Using Lambda function (may cause Integer Overflow)
PriorityQueue<Integer> prq = new PriorityQueue<>((a, b) -> b - a);

Posted by: Guest on December-04-2020

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