Intermediate Java(15) - Queue

import java.util.*;

public class apples{

public static void main(String[] args){

PriorityQueue<String> q = new PriorityQueue<String>();

q.offer("first"); → 放first入 PriorityQueue

q.offer("second"); → 放second入 PriorityQueue

q.offer("third"); → 放third入 PriorityQueue

System.out.printf("%s ", q);

System.out.println();

System.out.printf("%s ", q.peek()); → 那一個是第一優先次序(first)

System.out.println();

q.poll(); → 刪除第一優先次序(first)

System.out.printf("%s ",q);

}

}

這是運行時的結果:

[first, second, third]

first

[second, third]