Full example of priorityqueue (priority queue)

package cc.cv;import java.util.Comparator;import java.util.PriorityQueue;/** * PriorityQueue(优先队列)使用完整示例 * 采用PriorityQueue时里面的每个元素按照一定标准的优先级进行存储. * 而这个优先级的标准我们可以用Comparator来自己定义. *  * 参考资料: * 1 http://blog.csdn.net/chengyingzhilian/article/details/8078032 * 2 http://java-er.com/blog/java-priority-queue/ * 3 http://blog.csdn.net/hantiannan/article/details/7623108 *   Thank you very much *  */public class PriorityQueueTest {private int initialCapacity=10;public static void main(String[] args) {PriorityQueueTest priorityQueueTest=new PriorityQueueTest();priorityQueueTest.test();}/** * 将一群斑马放入优先队列PriorityQueue中. * 既然是优先队列PriorityQueue,那么就有一个优先的标准. * 在此就按照每个斑马的身高优先将一群斑马存在队列中 */private void test(){PriorityQueue<Zebra> priorityQueue=new PriorityQueue<Zebra>(initialCapacity, new ZebraComparator());Zebra zebra1=new Zebra("a", 130);priorityQueue.add(zebra1);Zebra zebra2=new Zebra("b", 130);priorityQueue.add(zebra2);Zebra zebra3=new Zebra("c", 130);priorityQueue.add(zebra3);Zebra zebra4=new Zebra("d", 130);priorityQueue.add(zebra4);Zebra zebra5=new Zebra("a", 110);priorityQueue.add(zebra5);Zebra zebra6=new Zebra("c", 120);priorityQueue.add(zebra6);System.out.println("priorityQueue.size()="+priorityQueue.size());//每个元素依次出队,便于测试while (!priorityQueue.isEmpty()){     System.out.println(priorityQueue.poll());}System.out.println("priorityQueue.size()="+priorityQueue.size());}//按照斑马的身高进行排序,身高相同时再比较名字class ZebraComparator implements Comparator {@Overridepublic int compare(Object arg0, Object arg1) {Zebra zebra0 = (Zebra) arg0;Zebra zebra1 = (Zebra) arg1;if (zebra0.getHeight() > zebra1.getHeight()) {return 1;}// 身高相同时再比较名字if (zebra0.getHeight() == zebra1.getHeight()) {return zebra0.getName().compareTo(zebra1.getName());}if (zebra0.getHeight() < zebra1.getHeight()) {return -1;}return 0;}}/** * 动物园里的大熊猫和斑马还是很可爱的。 * 看大熊猫的话,成都熊猫基地很爽. * 看斑马的话,北京动物园不错,里面还有需要仰着脖子看的长颈鹿...... * 在这里就用斑马举例吧,它有名字和身高这两个属性 */private class Zebra{private String name;private int height;public Zebra(String name, int height) {super();this.name = name;this.height = height;}public String getName() {return name;}public void setName(String name) {this.name = name;}public int getHeight() {return height;}public void setHeight(int height) {this.height = height;}@Overridepublic String toString() {return "Zebra [name=" + name + ", height=" + height + "]";}}}

Full example of priorityqueue (priority queue)