多选题 Given:
1. import java.util.*;
2. class Priorities {
3. public static void main(String[] args) {
4. PriorityQueue toDo = new PriorityQueue();
5. toDo.add("dishes");
6. toDo.add("laundry");
7. toDo.add("bills");
8. toDo.offer("bills");
9. System.out.print(toDo.size() + " " + toDo.poll());
10. System.out.print(" " + toDo.peek() + " " + toDo.poll());
11. System.out.println(" " + toDo.poll() + " " + toDo.poll());
12. } }
What is the result?