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public class Test {

    public static void main(String[] args) {

        // 1、创建多个狗狗对象

        Dog ououDog = new Dog("欧欧", "雪娜瑞");

        Dog yayaDog = new Dog("亚亚", "拉布拉多");

        Dog meimeiDog = new Dog("美美", "雪娜瑞");

        Dog feifeiDog = new Dog("菲菲", "拉布拉多");

        // 2、创建LinkedList集合对象并把多个狗狗对象放入其中

        LinkedList dogs = new LinkedList();

        dogs.add(ououDog);

        dogs.add(yayaDog);

        dogs.addLast(meimeiDog);

        dogs.addFirst(feifeiDog);

        // 3、查看集合中第一条狗狗的昵称

        Dog dogFirst = (Dog) dogs.getFirst();

        System.out.println("第一条狗狗的昵称是" + dogFirst.getName() + "。");

        // 4、查看集合中最后一条狗狗的昵称

        Dog dogLast = (Dog) dogs.getLast();

        System.out.println("最后一条狗狗的昵称是" + dogLast.getName() + "。");

        // 5、删除集合中第一个狗狗和最后一个狗狗

        dogs.removeFirst();

        dogs.removeLast();

        // 6、显示删除部分狗狗后集合中各条狗狗信息

        System.out.println("\n删除部分狗狗后还有" + dogs.size() + "条狗狗。");

        System.out.println("分别是:");

        for (int i = 0; i < dogs.size(); i++) {

            Dog dog = (Dog) dogs.get(i);

            System.out.println(dog.getName() + "\t" + dog.getStrain());

        }

    }

}