• Write and test a singleton class - Verify getInstance () returns a non-null value • Use Assertions. assertNonNull() - Verify getInstance () returns the identical instance when it is called multiple times. • Use hashCode () and assertEquals() - Use assertSame () alternatively.
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- Task Declare and implement 5 classes: FloatArray, SortedArray, FrontArray, PositiveArray & NegativeArray. 1- The FloatArray class stores a dynamic array of floats and its size. It has: - A parameterized constructor that takes the array size. - An add method that adds a float at the end of the array. - Overloading for the insertion operator << to write the array to a file (ofstream) - Overloading for the extraction operator >> to read the array elements from the file (ifstream) and add them to the array. - A destructor to deallocate the array 2- The SortedArray inherits from FloatArray. It has: - A parameterized constructor that takes the array size. - An add method that adds a float at the right place in the array such that the array remains sorted with every add. Don’t add to the array then sort but rather add in the right place. 3- The FrontArray inherits from FloatArray. It has: - A parameterized constructor that takes the array size. - An add method that…Use NetBeans Note for all the above User-Defined Classes: • Provide appropriate validation code so the right values get populated in the instance variables. For example, the payrate should not be negative. Write a Java application (Client) program with a static method called generateEmployees( ) that returns a random list of 10 different types of Employee objects. You would use an ArrayList to store the employee objects that will be returned. Use a for loop to populate randomly different types of employee objects with some random data. You could possibly think of a range of values like 1 – 4. If random value is 1, create a HourlyEmployee object with some randomly generated data, if 2, a SalariedEmployee object with some random data and so on. I would leave it to your ingenuity to generate and populate these different Employee objects with other data like name etc. As these objects are generated, add them to your data structure (array or ArrayList that you are using). Finally, the…TaskDeclare and implement 5 classes: FloatArray, SortedArray,FrontArray, PositiveArray & NegativeArray.1- The FloatArray class stores a dynamic array of floats and itssize. It has:- A parameterized constructor that takes the array size.- An add method that adds a float at the end of the array.- Overloading for the insertion operator << to write the array to afile (ofstream)- Overloading for the extraction operator >> to read the arrayelements from the file (ifstream) and add them to the array.- A destructor to deallocate the array2- The SortedArray inherits from FloatArray. It has:- A parameterized constructor that takes the array size.- An add method that adds a float at the right place in the arraysuch that the array remains sorted with every add. Don’t add tothe array then sort but rather add in the right place.3- The FrontArray inherits from FloatArray. It has:- A parameterized constructor that takes the array size.- An add method that adds a float at the front of…
- Declare and implement 5 classes: FloatArray, SortedArray, FrontArray, PositiveArray & NegativeArray. 1- The FloatArray class stores a dynamic array of floats and its size. It has: - A parameterized constructor that takes the array size. - An add method that adds a float at the end of the array. - Overloading for the insertion operator << to write the array to a file (ofstream) - Overloading for the extraction operator >> to read the array elements from the file (ifstream) and add them to the array. - A destructor to deallocate the array 2- The SortedArray inherits from FloatArray. It has: - A parameterized constructor that takes the array size. - An add method that adds a float at the right place in the array such that the array remains sorted with every add. Don’t add to the array then sort but rather add in the right place. 3- The FrontArray inherits from FloatArray. It has: - A parameterized constructor that takes the array…Declare and implement 5 classes: FloatArray, SortedArray, FrontArray, PositiveArray & NegativeArray. 1- The FloatArray class stores a dynamic array of floats and its size. It has: - A parameterized constructor that takes the array size. - An add method that adds a float at the end of the array. - Overloading for the insertion operator << to write the array to a file (ofstream) - Overloading for the extraction operator >> to read the array elements from the file (ifstream) and add them to the array. - A destructor to deallocate the array 2- The SortedArray inherits from FloatArray. It has: - A parameterized constructor that takes the array size. - An add method that adds a float at the right place in the array such that the array remains sorted with every add. Don’t add to the array then sort but rather add in the right place. 3- The FrontArray inherits from FloatArray. It has: - A parameterized constructor that takes the array size. - An add method that adds a float at…Add to this code & apply in it, hashing for Confidentiality service or Username & password for Authentication service (JAVA code) server side class initializes socket, establishes connection with socket.accept method, read string and close the connection. but this code Doesn't it implement authentication and confidentiality services, so you should ADD IT in this codes below Server class import java.net.*; import java.io.*;public class TestServer {public static void main(String[] args){try{ServerSocket ss=new ServerSocket(8088);Socket s=ss.accept(); DataInputStream DataInput=new DataInputStream(s.getInputStream());String str=(String)DataInput.readUTF();System.out.println("message= "+str);ss.close();}catch(Exception e){System.out.println(e);}}} client class import java.io.*;import java.net.*;public class TestClient {public static void main(String[] args) {try{Socket s=new Socket("localhost",8088);DataOutputStream output=new…
- Write a code in python, You will implement Hashtable using two techniques: Separate Chaining and Linear Probing. Implement Hashtable using Separate Chaining Implement hashtable using Linear Probing Test your both Hashtable classes with instances of Student class; you can have three (3) data members and appropriate functions, including hash() function. Test your both Hashtable classes with instances of Employee class; you can have three (3) data members and appropriate functions, including hash() function.Java Code: Build the two variable classes that we need: InterpreterDataType and a subclass InterpreterArrayDataType. I will abbreviate these as IDT and IADT. IDT holds a string and has two constructors - one with and one without an initial value supplied. IADT holds a HashMap<String,IDT>. Its constructor should create that hash map. We will use these as our variable storage classes as the interpreter runs. Let's start the interpreter itself. Create a new class (Interpreter). Inside of it, we will have an inner class - LineManager. We will also need a HashMap<String,IDT> that will hold our global variables. We will also have a member HashMap<String, FunctionDefinitionNode> - this will be our source when someone calls a function. The LineManager should take a List<String> as a parameter to the constructor and store it in a member. This will be our read-in input file. It will need a method : SplitAndAssign. This method will get the next line and split it by looking…Declare and implement 5 classes: FloatArray, SortedArray, FrontArray, PositiveArray & NegativeArray 1- The FloatArray class stores a dynamic array of floats and its size. It has:- A parameterized constructor that takes the array size. - An add method that adds a float at the end of the array.- Overloading for the insertion operator << to write the array to afile (ofstream)- Overloading for the extraction operator >> to read the array elements from the file (ifstream) and add them to the array.- A destructor to deallocate the array 2- The SortedArray inherits from FloatArray. It has:- A parameterized constructor that takes the array size. - An add method that adds a float at the right place in the arraysuch that the array remains sorted with every add. Don’t add to the array then sort but rather add in the right place. 3- The FrontArray inherits from FloatArray. It has:- A parameterized constructor that takes the array size. - An add method that adds a float at the front…
- Malware files are often identified by hash values to uniquely identify the files. Given a dictionary called malware that is an instance of the class Dictionary and implements DictionaryInterface with key-value pairs of type String for the filename and MDHash objects for the search key, write a Java statement that adds a malware name that is the string "Trojan Dropper" that has an MDHash search-key "55ad340609f4b30". ooo malware.insert("TrojanDropper", "55ad340609f4b30"); malware.insert("55ad340609f4b30", "TrojanDropper"); malware.add("Trojan Dropper", "55ad340609f4b30"); malware.add("55ad340609f4b30", "TrojanDropper");package customstring; import static org.junit.jupiter.api.Assertions.assertEquals; import java.util.*; /*** In this assignment, you will implement a simple class called CustomString. This class represents a more customizable version * of a String, with additional attributes and methods. * For example, the CustomString class has a “reverse” method* capitalization is reversed (i.e., lowercase to uppercase and uppercase to lowercase) for the alphabetical characters specified * in the given arg. For CustomString “abc, XYZ; 123.”, calling reverse("bcdxyz@3210.") will return "aBC, xyz; 123.". * * The CustomString class also has a “remove” method which returns a new string version of the current string where the alphabetical * characters specified in the given arg, are removed. For CustomString "my lucky numbers are 6, 8, and 19.", calling remove("ra6") * will return "my lucky numbes e 6, 8, nd 19.".* */public class CustomString {//instance variables/*** Current string.*/String…Please edit this class Authenticator. Remove breaks. Also create user array of size 100 rather than 3 different arrays. Also edit so it can be more OOP import java.util.Scanner; public class AuthenticatorApp { public static void main(String[] args) throws Exception { Scanner input=new Scanner(System.in); Authenticator obj=new Authenticator("user.data"); String Username,Password; boolean done=false; int count=0; while(count<3) { System.out.print("Username? "); Username=input.next(); System.out.print("Password? "); Password=input.next(); obj.authenticate(Username,Password); count++; } System.out.print("Too many failed attempts... please try again later"); input.close(); } } ------------------------------------------------------------------------------------------------------------import java.io.File; import…