public class Node {Node next;Object data;public Node(Object data){this.data = data;}}
class Linked_List(){Node head;/*** 查询链表中的元素个数*/public int getLen(){Node cur = head.next;int count = 1;if(cur == null){return -1;}else{while(cur.next != null){count++;cur = cur.next;}return count;}}/*** 添加元素* @param node*/public void add(Node node){Node temp = head;while(temp.next != null){temp = temp.next;}temp.next = node;}/*** 按data删除元素*/public void del(Node node){Node temp = head;while(temp.next.data.equals(node.data)||temp.next == null){temp = temp.next;}if(temp.next == null){System.out.println("未找到元素");}else{temp.next = temp.next.next;}}/*** 遍历链表*/public void show(){Node temp = head.next;if(temp != null){while(temp.next != null){System.out.println(temp);temp = temp.next;}}else{System.out.println("链表为空");}}}