public class Node { int value; Node leftChild; Node rightChild; }
public class Node { int value; Node next; public Node(int value) { this.value = value; this.next = null; } }In this example, a Node class is used to create a linked list by defining a value and a reference to the next Node in the list. The package library used for the Node data structure can vary depending on how it is used. However, some common libraries for working with trees and linked lists include the Java Collections framework, Apache Commons Collections, and Guava.