Please written by computer source   java) 13) Assume the class Cylinder exists, and that has the following method. Assume both radius and height are global instance variables declared as double. public double calcVolume() { return Math.PI * radius * radius * height; } You decide that a static method (also called calcVolume) for calculating volume (of a theoretical cylinder) might be useful to client coders. Write the static method. Then rewrite the instance method shown above to leverage the new static method (thus reducing code duplication)

{In Java Programming Please} Create a class hierarchy that represents different types of employees in a company. Start with a class called Employee that has two methods: calculateSalary() and displayDetails(). Then, create two subclasses of Employee: Manager and Engineer. Override the calculateSalary() method in both subclasses to calculate the salary based on their job role and experience. Override the displayDetails() method in both subclasses to print out a message indicating the details of the employee. Next, create another class called Salesperson that extends Employee and has a method called calculateCommission(). Create two subclasses of Salesperson: SeniorSalesperson and JuniorSalesperson. Override the calculateCommission() method in both subclasses to calculate the commission based on their sales performance. Override the displayDetails() method in both subclasses to print out a message indicating the details of the salesperson. In the main method, create objects of each class…

In C#, how would you write (2) programmer defined methods as described below:   Method #1 (GreetingGeneric) — a type void programmer defined method does not require any parameters. It should output a generic greeting line for a letter. For example: "Dear Customer", "Dear Student", etc. Method #2 (GradeMessage) — a type void programmer defined method that has (3) parameters; (string, string, double) for (name, assignment, and grade) and should output the passed parameters in sentence format: GradeMessage("Jimmy", "Midterm Exam", 79.5) would output: Jimmy took the Midterm Exam and got 79.5 points.   The Main() method for this program should: call Method #1 to output the generic greeting ask the user to enter a name, assignment, and grade and pass them to Method #2 for output. Input should only be done in the Main() method and output in the programmer-defined methods.

Using python: (see attached- I need help with part Q2) Add a method to the person class name it (username) that takes the email and take off all the part from @ and after, and assigns the string before the @ sign to a variable username. For example: malabdullah@UT.edu, the method will assign 'malabdullah' as the username.

Define the missing method. Use "this' to distinguish the local member from the parameter name. // ===== Code from file CablePlan.java public class CablePlan { private int numDays; // FIXME: Define setNumDays () method, using "this" implicit parameter. public void setNumDays (int numDays) { /* Your solution goes here */ } public int getNumDays () { return numDays; } // ==== end // ===== Code from file CallCablePlan.java import java.util.Scanner; public class CallCablePlan { public static void main (String [] args) { Scanner scnr = new Scanner (System.in); new CablePlan (); CablePlan houselPlan int userNum; scnr.nextInt (); houselPlan.setNumDays (userNum); System.out.println (houselPlan.getNumDays ()); userNum = // ===== end ==== =

// IMPORT LIBRARY PACKAGES NEEDED BY YOUR PROGRAMimport java.util.List;// SOME CLASSES WITHIN A PACKAGE MAY BE RESTRICTED// DEFINE ANY CLASS AND METHOD NEEDED// CLASS BEGINS, THIS CLASS IS REQUIREDclass Solution{ // METHOD SIGNATURE BEGINS, THIS METHOD IS REQUIREDint itemPairs(int num, List<Integer> itemValues, int target) {// WRITE YOUR CODE HERE}// METHOD SIGNATURE ENDS}

Please answer question. This is pertaining to Java programming language 3-20

In Java code: Write the class encapsulating the concept of money, assuming that money has the following attributes: dollars, cents In addition to the constructors, the accessors and mutators,  write the following methods: public Money() public Money(int dollars, int cents) public Money add(Money m) public Money substract(Money m) public Money multiply(int m) public static Money[] multiply(Money[] moneys, int amt) public boolean equals(Money money) public String toString() private void normalize() // normalize dollars and cents field Add additional helper methods if necessary. Use the following test driver program to test your Money class: public class MoneyTester{public static void main(String[] args){Money m1 = new Money(8, 75); // set dollars to 8 and cents to 75Money m2 = new Money(5, 80); // set dollars to 5 and cents to 80 MoneyMoney m3 = new Money(); // initialize dollars to 0 and cents to 0System.out.println("\tJane Doe " + "CIS35A Spring 2021 Lab 4"); // useyour…

// interface method ==================================================public boolean isFullBT() {/*See BST.java for method specification *//* Hint: How can you "break-up" the problem into smaller pieces? *//* Your code here */return false; // Dummy return statement. Remove when you implement!} IN JAVA LANGUAGE  RETURN TRUE IF BST IS A COMPLETE BST RETURN FALSE IS BST IS NOT A COMPLETE BST ALL INFO IN PICTURES PLS AND THANK YOU!!!!!

public class utils { * Modify the method below. The method below, myMethod, will be called from a testing function in VPL. * write one line of Java code inside the method that adds one string * to another. It will look something like this: * Assume that 1. String theInput is 2. string mystring is ceorge неllo, пу nane is * we want to update mystring so that it is неllo, пу nane is Ceorge */ public static string mymethod(string theInput){ System.out.println("This method combines two strings."); Systen.out.println("we combined two strings to make mystring); return mystring;