What is the easiest way to fix a Node Constructor in my Java program? The current problem is it does not accept the Object being passed into it

What is a tree in Java? A   A tree is a branching mechanism that allows multiple decisions in one statement. B   A tree is a collection in which each entry has one parent but may have multiple children. C   A tree is a collection in which each entry may have multiple parents but may have only one child. D   A tree is a method call pattern where each call may generate multiple additional calls until the process is complete.     What arguments does Java need to create a Font object? A   One argument: the font's name. B   Two arguments: the font's name and its style. C   Three arguments: the font's name, its style, and its size. D   Four arguments: the font's name, its style, its size, and its color.     How do we use an iterator to get the next element in a collection? A   We call the iterator's next() method. B   We call the collection's iterate() method.…

Run the program to tell me there is an error, BSTChecker.java:3: error: duplicate class: Node class Node { ^ BSTChecker.java:63: error: class LabProgram is public, should be declared in a file named LabProgram.java public class LabProgram { ^ 2 errors This is my program, please fix it.     import java.util.*; class Node { int key; Node left, right; public Node(int key) { this.key = key; left = right = null; } } class BSTChecker { public static Node checkBSTValidity(Node root) { return checkBSTValidityHelper(root, null, null); } private static Node checkBSTValidityHelper(Node node, Integer min, Integer max) { if (node == null) { return null; } if ((min != null && node.key <= min) || (max != null && node.key >= max)) { return node; } Node leftResult = checkBSTValidityHelper(node.left, min, node.key); if (leftResult != null) { return leftResult; } Node rightResult = checkBSTValidityHelper(node.right, node.key, max); if (rightResult != null) { return rightResult; }…

how to create an interface in java that contains the following methods: boolean myPush(T element);  // pushes element onto the stack; returns true if element successfully pushed, false otherwise boolean myPop();  // removes the top element of the stack; returns true if element successfully popped, false otherwise T myTop();  // if the stack is not empty returns the top element of the stack, otherwise returns null String toString();  // returns contents of the stack as a single String int size();  // return number of elements in the stack then create java file that Implements your interface that you created as a linked stack, then use the driver shown in screen shot to test. below is the code for the LLNode class  public class LLNode<T> { protected LLNode<T> link; protected T info; public LLNode(T info) { this.info = info; link = null; }   public void setInfo(T info) { this.info = info; } public T getInfo() { return info; } public void setLink(LLNode<T> link) {…

Assume we have an IntBST class, which implements a binary search tree of integers. The field of the class is a Node variable called root that refers to the root element of the tree. 1) Write a recursive method for this class that computes and returns the sum of all integers less than the root element. Assume the tree is not empty and there is at least one element less than the root. 2) Write a recursive method that prints all of the leaves, and only the leaves, of a binary search tree. 3) Write a method, using recursion or a loop, that returns the smallest element in the tree.

What is their importance, how are they related, and how useful are the following topics in java programming: Lists, Stacks, Sets, and Maps.  include any references.