Write a program to create a dictionary class using BST that allows to insert, delete, display in-order and search records. Each record represents a book and should contain, book title, author name,

A Dictionary class using Binary Search Tree (BST) is an efficient data structure to store and manage records. BSTs are based on the concept of binary search which allows fast insertion, deletion, searching and traversal operations on a set of elements called items. In this program we will create a dictionary class using BST that allows to insert, delete, display in-order and search records containing book title, author name, number of copies and publication year. We will use the book title as key for inserting records into the tree.

First let us define the Book Class that contains information about each book such as its title, author name etc., This is essential for creating objects (books) that can be inserted into a dictonary implemented by BST:

class Book {

String title; // Title of the book …(1)
String author; // Author’s Name …(2)
int numOfCopies; // Number Of Copies …(3)
int pubYear; // Year Of Publication …(4)

public Book(){}

public Book(String ttle ,String auth ,int numCp ,int yrPub){ …….Constructor……. …..(5)

this.title=ttle; ……setter methods…… ….. (6-9)
this.author =auth ; ……for setting values….. ….. (10 -13 )
this.numOfCopies=numCp ; ….into instance variables.. ….. (14 – 17 ) . . . . . . . . . . .. ……….then finally………… returns nothing ……….returns void……………….. …………end constructor……… }

public String getTitle(){ return this.title;} …………….getter methods…………. ………to get values from instance variables………. …………..of books objects……………… …………return type matches with instace variable type……………… ………………….end method…………………………. }

public String getAuthor(){ return this.author;}

Write a program to create a dictionary class using BST that allows to insert, delete, display in-order and search records. Each record represents a book and should contain, book title, author name

public int getNumberOfCopies(){ return this.numOfCopies;} …………….same process goes till last value……below……………………………….

public int getPublicationYear(){ return this:pubYear;} ……….all done now have all setters nd getters…………………………… ……………..we are ready to move forward…………………….. …………….with our main class implementation……………. …………….which is dictionary implemented by BST………….} Now lets move onto our main class i e Dictionary which implements Binary Search Tree: ===============================Dictionary======================================= import java.*; /*Importing library files*/ /*Defining Dicionary Class*/ Public Class Dictonary{ private Node root ; /*Declaring global variable root of type node*/ Private Static Node currentNode = null ; /*declaring another global variable currentNode */ Constructor() {root = null ;}/*Initializing Root Global Variable */ Void InsertionBookRecordInTreeUsingRotation : /*Method definition*/ If CurrentNode Is Null•{ Create A Newnode With The Key •Which Is Also The Object Of Type ‘Book’•And Stores It In Currentnode• And Set Roots Value To CurrentNode.} Else If The Keys Are Less Than That Of Root {If Left Subtree Is Null Then Set Left Child As ‘Currentnode’Else Go To The Left Subtree And Call IterateInsert Function Again.} Else If The Keys Are Greater Than That Of Root{If Right Subtree Is Null Then Set Right Child As ‘Currentnode’Else Go To The Right Subtree And Call IterateInsert Function Again.}End Method Definition DeleteBookRecordFromTree Using Rotation : /*Method Definition */ Check Whether Key Exists Or Not •If Yes then delete it else print key does not exist message.} ::SearchBookrecordUsingRotation:: /*Method Definiton */ Begin At Start Node Which Is Called ‘Root’Here Traversal Begins From Root Node Towards Its Children Until Match Found Or Reached Leaf/NULL Node Since All Operations Leads To LogN Complexity Thus Making It Fastest Possible Algorithm For Such LookUps End Method Definition DisplayInOrderRecordsUsingRotation : /*Method Definition*/ Starting At Leaves Move Up Till We Reach Top Most Parent/Null Now Print Nodes By Visiting Each Child Recursively From Bottom To TopLeft  Middle Right This Will Lead Us To An ordered Output Form End Method//Definition/* ================================END OF CLASS=========================================================Now we have successfully created a Dictionary class using Binary Search Tree that allows us to insert new books into it, delete existing books from it in order or outorder manner depending upon user requirement as well as display desired record using its key i e book tile or search any particular record within tree efficiently

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