max heap java

Shakti Amarantha

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()+" ");
        }
    }

}

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4.2

9

Chilemagic 115 points

                                    // min heap: PriorityQueue implementation from the JDK
PriorityQueue&lt;Integer&gt; prq = new PriorityQueue&lt;&gt;();

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

Thank you! 9

4.2 (10 Votes)

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