Can we have a Priority Queue of an array of integers in java

Question

can we define a Priority Queue of an array that compare arrays by their length?

    PriorityQueue<int[]> pq=new PriorityQueue<int[]>(5, (a,b) -> a.length - b.length);
    int[] a = new int[]{1,2};
    int[] b = {1,2,3};
    int[] c = new int[]{3};
    pq.add(a);
    pq.add(b);
    pq.add(c);
    while (pq.size() != 0)
    {
        System.out.println(pq.remove());
    }
}

output :
[I@1c20c684
[I@1fb3ebeb
[I@548c4f57

Try `System.out.println(Arrays.toString(pq.remove()));` – Eran Dec 08 '16 at 10:39 — Eran, Dec 08 '16 at 10:39
but what if we want to put it in another array? – Mina Shaigan Dec 09 '16 at 09:03 — Mina Shaigan, Dec 09 '16 at 09:03

score 1 · Answer 1 · edited Jun 24 '19 at 03:47

1

You can, with whatever comparator you want. Your code is printing addresses of the array as output. You can use java.util.Arrays.toString() method.

edited Jun 24 '19 at 03:47

Jared Burrows

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answered Dec 08 '16 at 10:56

Abhishek Kumar

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Can we have a Priority Queue of an array of integers in java

1 Answers1