Sorting

AP Computer Science A· difficulty 3/5

public class Item implements Comparable<Item> {
  private int weight;
  public Item(int w) { weight = w; }
  public int compareTo(Item other) {
    return other.weight - this.weight;
  }
}

What sort order does this produce?

A
$ascending by weight$
B
$random$
C
$no order$
D
$descending by weight$
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Explanation

Reversing the subtraction yields descending order.

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