If a class C1 has an instance variable whose type is another class, C2. This means C1 has-a C2." Please explain or provide an example (preferred language is Java) of why this is right.

Complete the partial declaration of Class Car:    public class Car {            // declare three private instance variables: color, speed, model // define a constructor with two parameters: c , m which will assign values to color and model. //define set and get method for all instance variables //define a method named calspeed( ) with int return type, the method will increase the speed by 50 mile per hour.   }   Complete the application below.            public class CarApp {        public static void main() {        string color = blue;      string model = C2021;i      int speed = 80;         // declare necessary object matching to the constructor definition // display the color and model on the screen // call the calspeed( ) method and display the new speed  after calculation. } }

Java program: The class diagram with four classes Mammal, Human, Student and Doctor is given. The Mammal class is given as well. Write down the remaining classes as described in the class diagram. The fields and methods for each class is given in the attachment. //in Mammel.java Public interface Mammal{ public double hairColor(): }   1. Class Human: Fields: age(int), weight(double), height(double) Methods: getAge, getWeight, getHeight 2. Class Student: Fields: major (String), gpa (double), creditHours (int) methods: getMajor: returns major, getGpa: returns gpa, getYear: returns freshman, sophmore, junior, senior as determined by earned credit hours Freshman : less than 32 credit hours sophmore: at least 32 but less than 64 credit hours junior: at least 64 credit hours but less than 96 credit hours senior: at least 96 credit hours 3.Class Doctor: Fields: years(int), Speciality (String) methods: getYears: returns years, getSpeciality: returns speciality, getSalary: calculates…

Note: Question of Object-oriented programming

If the programmer doesn't declare any constructors for an extended class, what constructors will be inherited from the superclass? How does this inherited constructor initialize new instance variables that are not part of the superclass?   Suppose that Vehicle is a class and Car is a new class that extends Vehicle. Write a description of which kind of assignments are permitted between Car and Vehicle variables.   Suppose you write a new constructor for an extended class. Describe two different ways that the superclass's instance variables could be initialized within the constructor for the extended class.

If class A is a subclass of class B, then A has access to all of B's instance variables, including private ones. True False

Complete the following class diagram with the correct associations to make our object-oriented parking system complete.

Please answer question. This is pertaining to Java programming language 2-10

Help, I making a elevator simulator. I have to use polymorphism and object oriented programming to write this code. Can someone please help me improve this code I have. The remaining code is in the pictures. Any help is appreciated. Thank You! The simulation should have 4 types of Passengers: Standard: This is the most common type of passenger and has a request percentage of 70%. Standard passengers have no special requirements.  VIP: This type of passenger has a request percentage of 10%. VIP passengers are given priority and are more likely to be picked up by express elevators.  Freight: This type of passenger has a request percentage of 15%. Freight passengers have large items that need to be transported and are more likely to be picked up by freight elevators.  Glass: This type of passenger has a request percentage of 5%. Glass passengers have fragile items that need to be transported and are more likely to be picked up by glass elevators.   The simulation should also have 4 types…

JAVA: Briefly describe (1-2 sentences) each of the following object-oriented programming concepts: Attributes Methods Primitive Data Types vs. Objects Static methods/variables vs. non-static