Priority Queue Comparator 2d Array descending order-CodePudding

I am creating a priority queue and using comparator to make sure things are storing in descending order, but end of the day it does not store the values in descending order.

    int[][] a = {{1,2},{6,5},{3,4}};
    PriorityQueue<int[]> pq = new PriorityQueue<>(new Comparator<int[]>() {
                @Override
                public int compare(int[] o1, int[] o2) {
                    int s1 = (int) (Math.pow(o1[0], 2)   Math.pow(o1[1],2));
                    int s2 = (int) (Math.pow(o2[0], 2)   Math.pow(o2[1],2));
                    return Integer.compare(s2, s1);
//Also tried Integer.compare(s1, s2); it returns in ascending order
                }
            });

When I am adding the values to priorityQueue, I expect this to be added as {6,5}, {3,4}, {1,2}. But it is adding as {6,5}, {1,2}, {3,4}.

for(int i=0; i<a.length;i  ) {
            pq.add(a[i]);
        }

What is the mistake am doing above?

CodePudding user response：

Try to traverse queue:

while (!pq.isEmpty()) {
  System.out.println(Arrays.toString(pq.poll()));
}

[6, 5]
[3, 4]
[1, 2]