node.java

真的很麻烦也

public class Node {
  // Instance variables:
  private Object element;
  private Node next;
  // Simple constructors:
  public Node() {
    this(null, null);
  }
   public Node(Object e, Node n) {
    element = e;
    next = n;
  }
  // Accessor methods:
  Object getElement() {
    return element; 
  }
  Node getNext() { 
    return next;
  }
  // Modifier methods:
  void setElement(Object newElem) { 
    element = newElem; 
  }
  void setNext(Node newNext) {
    next = newNext; 
  }
}