用Java编写根据要求练习LinkedList方法，并提交运行结果截图 （1）基本方法：add, set, get, remove, clear, size等方法； （2）特有方法：addFirst, addLast, getFirst, getLast, removeFirst, removeLast, push, pop, clear等方法。 void push(E e)：与addFirst一样，实际上它就是addFirst； E pop()：与removeFirst一样，实际上它就是removeFirst； E poll()：查询并移除第一个元素；

好的，以下是根据您的要求编写的LinkedList方法的示例代码：

import java.util.LinkedList;

public class LinkedListExample {
    public static void main(String[] args) {
        LinkedList<String> linkedList = new LinkedList<>();

        // 基本方法
        linkedList.add("A");
        linkedList.add("B");
        linkedList.add("C");
        System.out.println("LinkedList: " + linkedList);

        linkedList.set(1, "D");
        System.out.println("LinkedList after set: " + linkedList);

        String element = linkedList.get(2);
        System.out.println("Element at index 2: " + element);

        linkedList.remove(0);
        System.out.println("LinkedList after remove: " + linkedList);

        linkedList.clear();
        System.out.println("LinkedList after clear: " + linkedList);

        int size = linkedList.size();
        System.out.println("Size of LinkedList: " + size);

        // 特有方法
        linkedList.addFirst("X");
        System.out.println("LinkedList after addFirst: " + linkedList);

        linkedList.addLast("Y");
        System.out.println("LinkedList after addLast: " + linkedList);

        String firstElement = linkedList.getFirst();
        System.out.println("First element: " + firstElement);

        String lastElement = linkedList.getLast();
        System.out.println("Last element: " + lastElement);

        String removedFirstElement = linkedList.removeFirst();
        System.out.println("Removed first element: " + removedFirstElement);
        System.out.println("LinkedList after removeFirst: " + linkedList);

        String removedLastElement = linkedList.removeLast();
        System.out.println("Removed last element: " + removedLastElement);
        System.out.println("LinkedList after removeLast: " + linkedList);

        linkedList.push("Z");
        System.out.println("LinkedList after push: " + linkedList);

        String poppedElement = linkedList.pop();
        System.out.println("Popped element: " + poppedElement);
        System.out.println("LinkedList after pop: " + linkedList);

        String polledElement = linkedList.poll();
        System.out.println("Polled element: " + polledElement);
        System.out.println("LinkedList after poll: " + linkedList);
    }
}

您可以将上述代码保存为.java文件并运行，然后将运行结果截图提交给我。