打印链接列表[副本]

Question

package linkedlist;

import java.util.Scanner;

public class LinkedListTest {

    public static void main(String[] args) {
        Scanner keyboard = new Scanner(System.in);
        String item;

        MyLinkedList list = new MyLinkedList();
        System.out.println("Number of items in the list: " + list.size());

        Object item1 = "one";
        Object item2 = "two";
        Object item3 = "Three";

        list.add(item1);
        list.add(item2);
        list.add(item3);

        System.out.println("Number of items in the list: " + list.size());

        System.out.println(list);
}

Answer 1

默认情况下，java中的每个类都从object类获得ToString方法。对象类中的ToString方法将打印类名和哈希代码。

可以重写LinkedList的toString方法。例如：

class MyLinkedList extends LinkedList
{

    /* (non-Javadoc)
     * @see java.lang.Object#toString()
     */
    @Override
    public String toString() {
        return "MyLinkedList [size=" + size + ", first=" + first + ", last="
                + last + ", modCount=" + modCount + "]";
    }

}

然后您可以打印它：

 MyLinkedList list = new MyLinkedList ();
 System.out.println(list);