I have some work where I have to create a binary tree. Anyway I am stuck on one of the classes which has several methods I must fill in! The code is below
The headers for each method are: public Node find (member p1)The method find(Member p1) is used to return the node which contains a particular member. It is a private method because the interface to CabinetTree should not provide direct access to the internal nodes. It makes use of the method Node findNode (Member p1, Node current)
and the next method is : Node findNode(Member p1, Node current) which searches the tree from current node to find a node whose value is equal to the Member p1, i.e. a node in the tree such that p1.equals(current.getMember()) is true. If there is no such node then the method should return null.
public class CabinetTree {
private Node head;
CabinetTree(Member p1) {
head = new Node(p1, null);
So in my binary search tree I'm trying to write a method that deletes the idem but for some reason it's not working. I have two things, I have the method and then another piece of code that tests the deletion method. Here's the actual method
i wrote it on paper with my examples.and just for laughts , i uploaded another picture that dont belong to my problem. its just my way to understand binary search tree implementation , so i wanted so share.just for laught : looks like the map of the universe.
now my problem : why after i changed Current to Current.left, Parent still has the value of root. i draw and wrote it on a paper. to be clear as possible - picture 2 :
I'm trying to use LinkedBinarySearchTree but a lot of the variables are protected in BinaryTreeNode. I am creating a BinaryTreeNode object but it still isn't allowing me to use them. The variables I am trying to use are element, left, and right.
import ch11.exceptions.*; import ch10.LinkedBinaryTree; import ch10.BinaryTreeNode; /** * LinkedBinarySearchTree implements the BinarySearchTreeADT interface with links.
*/ public class LinkedBinarySearchTree<T> extends LinkedBinaryTree<T> implements BinarySearchTreeADT<T>
I used tomahawk t:tree for showing my data in tree structure and displayed that very fine. But my problem is how can we find the node id in bean side when we select one node .Because i want to show some data based on that node.
Iva tried flipping the entire code upside down (expression) and No matter what I do the delete function returns a null pointer exception after my while loops takes the pointer right to where it should be.
package bp; import java.time.LocalDate; public class BinaryTree implements IBinaryTree { private Node root = null; private int sizeOfTree = 0;
We are required to write a binary‐search method to find an int within an array of ints. Without using any functions besides the basics (for loops, if statements, etc.)
I have this so far:
public int binarySearch(int[] ints, int n) { for(int i = 0; i < ints.length; i++) { if(ints[i] == n) { return ints[i]; } } }
treeView.setOnMouseClicked(new EventHandler<MouseEvent>() { @Override public void handle(MouseEvent mouseEvent) { if (mouseEvent.getClickCount() == 2 && mouseEvent.getButton() == MouseButton.PRIMARY) { // Some action } } });
For some reason when I click on a tab body I can also perform the listener action. How I can add additional statement to perform the action only if I select node?
I want to develop simple example in which I can select TreeView Nodes with Buttons(in some cases clicking on image and etc). I created this simple sample:
So everything in my program is working EXCEPT when it comes to calculating the result. I am supposed to evaluate the expression using postorder traversal to return the answer. I am honestly not sure how I would get the postorder traversal to return the answer to the expression since the only thing we really went over was how it re-ordered the expression so that it would end in the postorder/postfix order. Anyways, currently the way that I have the public int evaluate(Node node)method set up is giving me a result of 0, which obviously is not correct.
Here's the section that I'm having issues with:
public int evaluate(Node node){ if(node.isLeaf()){ return Integer.parseInt(node.value); } int result = 0; int left = evaluate(node.left); int right = evaluate(node.right);
I have a list of people with a matching telephone extension number, the people are organised in a hierachy tree with some colleagues at the same level and then some junior colleagues. I have been trying to write code that can find the tree height of any given member but I am unable too. Here is my code so far but the left and right are not working because I have not declared them any where in my code.
Java Code:
//hierarchy rank section 7 // **Depth** from node to root (bottom up) public int rank(Member p1){ //to do
I know that for a binary search tree the insert() method is easy. You just kept comparing the values of the nodes, and you would know whether to go left or right depending on the value of the node.However, I am stumped when trying to figure out how to add a node into a normal binary tree where you just keep adding the nodes to the leftmost side, regardless of value.Here is my attempt at the insert() method:
public class RegularTree extends BinaryTree { public CompleteTree() { super(); }
public void insert(Comparable item) { if(this.isEmpty()) { this.setRoot(new TreeNode(item)); return;
Is there a way that I can view my entire binary tree on Eclipse? I remember the old IDE that I used, jGrasp, had a feature in its debugging that would allow me to see exactly what was going on and I want to know if Eclipse has the same thing.
I have a little problem in my code. Using a threaded binary tree and inorder traversal check if every next element is equal to the previous element + 1. You are allowed to use additional functions as long as they are not recursive. I have implemented everything. Problem is that i cant compare elements as i should. They are type E.
I have written a code to get all the nodes below a current Node and it is working but I need to get it to look better if possible. To get the number of nodes below I have created an Array List, which I then go to the first Node below and add all the people to the Array list on the same level till I get to the end of the level, then I go down again until I cannot go down any more. Is there a way I can have my code without having to use an array List? I have put my code below. The brieff about the tree is that you have a parent and below the Parent are children who can have brothers and sisters next to them and after that they also have children below that. The method is trying to find the number of children below any given child
private LinkedList<Node> TempQueue = new LinkedList<Node>(); public int noOfYoungerChildren(Member p1){ Node tmp = find(p1); return countYoungerChildren(tmp);
I create a binary tree and now I would like to display the result in my jsp with conditions.
Each node has 4 elements (id, question, answer, and leftnode rightnode)
If the user clicks "Yes", the program goes to the left of the tree and if he answers "no" to the right of the tree.
For example, the initial question is "you're a man?" If he answers "yes" we will go to the left and page view "you're a singer?" If he answers "no" page displays "you're French? ".
In java, it would
cursor [i]. GetQuestion ()
to the original question.
Then
cursor [i] getQuestion. GetLeftnode () For yes and cursor [i]. GetRightnode (). GetQuestion for no.
Until the, everything works normally, but when I want to loop until there is no longer any issue by
I am trying to implement a simple binary search tree . How can I make a node in the tree which should store two pieces of information: a String variable called name, and a int variable called mark. ..
public class BinarySearchTree<E> implements Comparable<E> { public BinaryTree<E> root; int size; int mark; String name; // Constructor public BinarySearchTree()
I don't see any nodes that I add. Not sure why getting this error.
duplicate found Exception in thread "main" java.lang.NullPointerException at binarysearchtree.delete(binarysearchtree.java:111) at binarysearchtree.main(binarysearchtree.java:196) Java Result: 1 public class node<T>
The assignment is meant to understand and practice tree concepts, tree traversals and recursion. I am requested to use the tree to print the expressions by three ways and evaluate the expression in post-order. This is my node class,
package hw10; public class Node { String value; Node left, right; public Node(String value) {
