package LinkedList;
public class Linkedlist<T> {
private int size;
Node head;
Node tail;
public Linkedlist() {// default constructor
size = 0;
head = null;
tail = null;
}
public class Node {// Node class
T data;// current node data
Node next;// reference to next node
Node prev;// reference to previous node
public Node(T data) {// def constructor
this.data = data;
next = null;
prev = null;
}
@Override // to check equality of two nodes
public boolean equals(Object obj) {
if (this == obj)// checks if both have same reference
return true;
if (obj == null ||this==null || this.getClass() != obj.getClass())
return false;
@SuppressWarnings("unchecked")//casting obj to node gives a unchecked cast warning.
Node n=((Node)obj);
if(!(this.data==n.data))
return false;
return true;
}
As in the code above, I have a generic class Linkedlist which nests a Node class. The functionality of the code is very obvious, I'm trying to create a doubly linked list.
The problem is that in the equals function in the Node class, I am typecasting the object obj to a Node which gives an unchecked cast warning which I have currently suppressed. The autogenerated equals function from Visual Studio Code gives this same warning. I know that this warning must mean that my code can somehow break during runtime, but I don't know how and I am new to generics and programming in general. Is there any way to resolve this warning?
