Write a tester program to test the mobile class defined below. Create the class named with your id (for example: Id12345678) with the main method. Create two mobiles M1 and M2 using the first constructor. Print the characteristics of M1 and M2. Create one mobile M3 using the second constructor. Change the id and brand of the mobile M3. Print the id of M3. The programming language I'm using is Java. So, it'll be much appreciated if the answer was in Java. Thanks.

Create a class Date that converts a string of the form of “mm/dd/yyyy” into an object with three fields – month, day, and year. The class constructor may do this job, but do not forget to check the string for correctness. Once you have this class ready, input the date as a string with the following converting into an object of type Date.  The language is in Java.

Create a UML Diagram for this problem. Design a class named Rectangle to represent a rectangle. The class contains: i. Two data fields named width and height. ii. A constructor that creates a rectangle with the specified width and height. iii. A method named getArea() that returns the area of this rectangle. iv. A method named getPerimeter() that returns the perimeter. Write a test program that creates two Rectangle objects—one with width 4 and height 40 and the other with width 3.5 and height 35.7. Display the width, height, area, and perimeter of each rectangle in this order.

Please written by computer source Using Java, please follow the detailed instructions:

Write the Java code for the ensuing UML diagram. For the supplied class, create the constructor, mutator, and accessor methods. Create an instance of the Application class using the Demo class in the main function. Reminder: Method bodies are not required in order to compile and test the class's structure. Just make sure to provide dummy return values for any methods that don't return void. Application +Name: String + Run ( Exit ( A- B I 7 m I Q- E % 2 U S X₂ X² VHF

What are the benefits of using many programming languages?

please may you :  create a Python class named Animal with properties for name, age, and a method called speak. also include an initializer method for the class and demonstrate how to create an instance of this class. and  extend the Animal class by adding a decorator for one of its properties (e.g., age).  please include both a getter and a setter for the property, and demonstrate error handling.

Write a Rectangle class. Its constructor should accept length and width as a parameter. It should have methods that return its length, width, perimeter, and area. (Use Java) Show a demonstration where you create two separate rectangles.

In Java, Create a class Rectangle with double attributes length and width. The default constructor should set these attributes to 1. Provide methods that calculate the rectangle's perimeter and area, as well as accessors and mutators for both data fields. The mutator methods for length and width should verify that the number being passed in is larger than 0.0 and less than 20.0 -- if it doesn't fit those criteria, the value of the field should not be changed.Write a Driver class in the same file to test your Rectangle class. It should prompt the user to enter a length and width of a rectangle, and then print out the area and perimeter of the rectangle. (Use the mutators to set the length and width of the rectangle, not the constructor.)

I need the answer as soon as possible