why toString method does not work here??
- by user329820
Hi
this is my whole class ,I have added number 2 to the doubly linked list and then I want it to be be print in the concole but it will show this "datastructureproject.Node@f62373"
thanks!
package datastructureproject;
public class DoublyLinkedList {
private Node head = new Node(0);
private Node tail = new Node(0);
private int length = 0;
public DoublyLinkedList() {
head.setPrev(null);
head.setNext(tail);
tail.setPrev(head);
tail.setNext(null);
}
public void add(int index, int value) throws IndexOutOfBoundsException {
Node cursor = get(index);
Node temp = new Node(value);
temp.setPrev(cursor);
temp.setNext(cursor.getNext());
cursor.getNext().setPrev(temp);
cursor.setNext(temp);
length++;
}
private Node get(int index) throws IndexOutOfBoundsException {
if (index < 0 || index > length) {
throw new IndexOutOfBoundsException();
} else {
Node cursor = head;
for (int i = 0; i < index; i++) {
cursor = cursor.getNext();
}
return cursor;
}
}
public long size() {
return length;
}
public boolean isEmpty() {
return length == 0;
}
@Override
public String toString() {
StringBuffer result = new StringBuffer();
result.append("(head) - ");
Node temp = head;
while (temp.getNext() != tail) {
temp = temp.getNext();
result.append(temp.getValue() + " - ");
}
result.append("(tail)");
return result.toString();
}
public static void main(String[] args){
DoublyLinkedList list = new DoublyLinkedList();
list.add(0,2 );
System.out.println(list.get(0).toString());
}
}
