/** 
  * This class implements a node for a PDA singly linked list in Java.
  */
public class Node {

        //The input character to match
        public String wordChar;
        
        //The stck character to match
        //"e" = empty string
        public String stackChar;
        
        //The new character to push onto the stack
        //"e" = empty string
        public String pushChar;
        
        
        Node next;


		/** 
		  * Constructs a new node object, initalizing it with the given data
		  * item.  The next pointer of the node is set to null.
		  * @param data The character this node is to be initalized with.
		  */
        public Node(String l, String s, String p)
        {
                wordChar = l;
                stackChar = s;
                pushChar = p;
                next = null;
        }


		/** 
		  * Returns the next pointer for the given node.
		  * @return The next pointer of this node.
		  */
        public Node getNext()
        {
                return next;
        }


		/** 
		  * Sets the next pointer for the given node.
		  * @param next The new value for the next pointer of this node
		  */
        public void setNext(Node next)
        {
                this.next = next;
        }

		
		/** 
		  * Sets the data item for the given node.
		  * @param data The new value for the data item in this node.
		  */
        public void setData(String l, String s, String p )
        {
                wordChar = l;
                stackChar = s;
                pushChar = p;
        }
        
    public String toString () {

        // Convenience method for tracing.

        return ("["+wordChar+","+stackChar+","+pushChar+"]");

    }
        
        

}