The Room Carpet ClassPart (1) Create a class called RoomCarpet that has three private instance variables: room length and width infoot (double) and carpet cost per square foot (double). Additionally, the class should have:(a) A constructor that takes room length, room width and carpet cost per square foot. The constructor setsthe class variables to these values and in case any of these values is negative, set its instance variable tozero.(b) A mutator method (set) and an accessor method (get) for the carpet cost variable only.(c) A method getArea that returns the area of the room. The area of the room is computed by multiplying theroom’s length by the room’s width.(d) A method getTotalCost that returns the total cost of the carpet. The total cost is computed by multiplyingthe room area by the carpet cost per square foot.Part (2) Write a Java application that asks the user to enter the length and width of a room and the costper square foot of the carpeting. Create an object from RoomCarpet class you defined in Part (1) and use it todisplay the room area and the total cost of the carpet. 2 (2) WhatsAppClasses.pdfContentWatch 'ClassesQuickReview XHomework Help and Textbc XO File | C:/Users/Saud/Downloads/Classes.pdfSClasses.pdf3 / 6• A double data field named previousClosingPrice that stores the stock price for the previous day.• A double data field named currentPrice that stores the stock price for the current time.• A constructor that creates a stock with the specified symbol and name.• A method named getChangePercent() that returns the percentage changed from previousClosingPriceto currentPrice.Draw the UML diagram for the class and then implement the class. Write a test program that creates a Stockobject with the stock symbol ORCL, the name Oracle Corporation, and the previous closing price of 34.5. Seta new current price to 34.35 and display the price-change percentage.9. The Room Carpet ClassPart (1) Create a class called RoomCarpet that has three private instance variables: room length and width infoot (double) and carpet cost per square foot (double). Additionally, the class should have:(a) A constructor that takes room length, room width and carpet cost per square foot. The constructor setsthe class variables to these values and in case any of these values is negative, set its instance variable tozero.(b) A mutator method (set) and an accessor method (get) for the carpet cost variable only.(c) A method getArea that returns the area of the room. The area of the room is computed by multiplying theroom's length by the room's width.(d) A method getTotalCost that returns the total cost of the carpet. The total cost is computed by multiplyingthe room area by the carpet cost per square foot.Part (2) Write a Java application that asks the user to enter the length and widthper square foot of the carpeting. Create an object from RoomCarpet class you defined in Part (1) and use it todisplay the room area and the total cost of the carpet.a room and the cost10. Spider ClassPart (1) Define a class with the following specification.(a) The class name is Spider and has four instance variables: name (String), poison (boolean), weight (double),and gender (char).(b) Provide set and get methods to access the gender variable. In set method, the passed parameter should beM or m for male and F or f for female. If not, your program should print an invalid message and set genderto V as invalid gender.(c) Write a method called determineEnvironment() that accepts no input parameter and returns a string valueGENG11:43 PM+ 2 (2) WhatsAppClasses.pdfContentWatch 'ClassesQuickReview XHomework Help and Textbc XO File | C:/Users/Saud/Downloads/Classes.pdfSClasses.pdf3 / 6• A double data field named previousClosingPrice that stores the stock price for the previous day.• A double data field named currentPrice that stores the stock price for the current time.• A constructor that creates a stock with the specified symbol and name.• A method named getChangePercent() that returns the percentage changed from previousClosingPriceto currentPrice.Draw the UML diagram for the class and then implement the class. Write a test program that creates a Stockobject with the stock symbol ORCL, the name Oracle Corporation, and the previous closing price of 34.5. Seta new current price to 34.35 and display the price-change percentage.9. The Room Carpet ClassPart (1) Create a class called RoomCarpet that has three private instance variables: room length and width infoot (double) and carpet cost per square foot (double). Additionally, the class should have:(a) A constructor that takes room length, room width and carpet cost per square foot. The constructor setsthe class variables to these values and in case any of these values is negative, set its instance variable tozero.(b) A mutator method (set) and an accessor method (get) for the carpet cost variable only.(c) A method getArea that returns the area of the room. The area of the room is computed by multiplying theroom's length by the room's width.(d) A method getTotalCost that returns the total cost of the carpet. The total cost is computed by multiplyingthe room area by the carpet cost per square foot.Part (2) Write a Java application that asks the user to enter the length and widthper square foot of the carpeting. Create an object from RoomCarpet class you defined in Part (1) and use it todisplay the room area and the total cost of the carpet.a room and the cost10. Spider ClassPart (1) Define a class with the following specification.(a) The class name is Spider and has four instance variables: name (String), poison (boolean), weight (double),and gender (char).(b) Provide set and get methods to access the gender variable. In set method, the passed parameter should beM or m for male and F or f for female. If not, your program should print an invalid message and set genderto V as invalid gender.(c) Write a method called determineEnvironment() that accepts no input parameter and returns a string valueGENG11:43 PM+

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Part 1:
Please save the code as RoomCarpet.java
public class RoomCarpet {    private double length;…