Java A class always has a constructor that does not take any parameters even if there are other constructors in the class that take parameters. Choose one of the options: True False
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OOPs
In today's technology-driven world, computer programming skills are in high demand. The object-oriented programming (OOP) approach is very much useful while designing and maintaining software programs. Object-oriented programming (OOP) is a basic programming paradigm that almost every developer has used at some stage in their career.
Constructor
The easiest way to think of a constructor in object-oriented programming (OOP) languages is:
Java
A class always has a constructor that does not take any parameters even if there are other constructors in the class that take parameters.
Choose one of the options:
True
False
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- There is only one type of constructor and it is a constructor that does not take any parameters. Choose one of the options:TrueFalseThe Animal class has a default constructor with no parameters. Define a public overloaded constructor that takes two string parameters and an integer parameter for the type, the color, and the age of the animal. Ex: If the input is fox orange 5, then the output is: Animal: Unspecified, Unspecified, -1 Animal: fox, orange, 5 Animal.java public class Animal { privateStringtype; privateStringcolor; privateintage; publicAnimal() { // Default constructor type="Unspecified"; color="Unspecified"; age=-1; } /* Your code goes here */ publicvoidprint() { System.out.println("Animal: "+type+", "+color+", "+age); } } Zoo.java import java.util.Scanner; public class Zoo { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); String animalType; String animalColor; int animalAge; animalType = scnr.next(); animalColor = scnr.next(); animalAge = scnr.nextInt(); Animal emptyAnimal = new Animal(); Animal animal1…Java Programming: Write a static method named urgentAndIncomplete. Write the method as if it is in Main.java (not part of the ToDoItem class). The method should: Accept three ToDoItem references as parameters, and Return an int. Count how many of the ToDoItems meet two criteria: A priority greater than 3 Not completed The method should return how many of the parameters meet these criteria. That will be either 0, 1, 2, or 3.
- In java write a code : "picture 1" 1- Write a class declaration for Shape class and add the two variables to the class declaration sides: is an int variable that holds the number of sides the shape has. angles: is an int variable that holds the number of angles the shape has. 2- The class should have the following constructors: A constructor that accepts the following value as argument and assigns it to the appropriate fields: sides and angles. A no-arg constructor that assigns 0 to the sides, and 0 to the angles field. 3- Write mutator methods that store values in these fields and accessor methods that return the values in these fields as in above UML diagram. 4- Once you have written the class, write a separate program that creates two Shape objects to hold the following data: "Picture 2 "java When we create an object of a class, the object's instance variables are automatically initialized with its default values without us writing code in any constructor. Choose one of the options:TrueFalseModify the Car class example and add the following: A default constructor that initializes strings to “N/A” and numbers to zero. An overloaded constructor that takes in initial values to set your fields (6 parameters). accel() method: a void method that takes a double variable as a parameter and increases the speed of the car by that amount. brake() method: a void method that sets the speed to zero. To test your class, you will need to instantiate at least two different Car objects in the main method in the CarDemo class. Each of your objects should use a different constructor. For the object that uses the default constructor, you will need to invoke the mutator methods to assign values to your fields. Invoke the displayFeatures() method for both objects and display the variables. Demonstrate the use of the accessor method getColor() by accessing the color of each car and printing it to the console. Use the method accel to increase the speed of the first car by 65 mph. Use…
- Write all the code necessary for a class Truck. A Truck can be described as having a make (String), model (String), gas tank capacity (double), and whether it has a manual transmission (or not). Include the following methods in your class definition. A default constructor. An overloaded constructor which takes the make and the model as parameters. This method throws an IllegalArgumentException if the make is “Jeep”. An overloaded constructor which takes the gas tank capacity as a parameter. This method throws an IllegalArgumentException if the capacity of the gas tank is not between 15 and 20 gallons (inclusive). That’s 3 constructors in total. Each constructor, once done executing, should have fully initialized all of the object’s properties (i.e., attributes/member variables). Do not implement a toString method; assume one is properly defined for you. Do not implement any getters or setters. import java.lang.IllegalArgumentException ; // Write your code hereWrite a class called Alien. The Alien class must have one field of type String called name, one of type String called planet and one field of type boolean called humanoid. Write one constructor that takes three parameters to initialise all of these fields. The parameters must be passed in the order name, planet and humanoid status. IntelliJ hint (this won't be in the real test): put your cursor after the last field; right-click, choose Generate, choose Constructor, select the fields that are set via parameters and click Ok. Check that the constructor is correct. Write a getter method for each field. IntelliJ hint (this won't be in the real test): put your cursor after the closing curly bracket of the constructor; right click, choose Generate, choose Getter, select all of the fields; click Ok. Check that the you have three getters. Do not write setters methods. Write a method called getDetails that will return the values of the fields in one of the following two formats. For example,…Java programming If we send an int parameter to a method, and the parameter value is changed inside the method, will that affect the original value?
- java Create Class (any class) that include: Three variables Name ( default value is your name ) Id ( default value is your Id ) Print Method. Create parameterized constructor for that class and initialize it with your name and your id, try to use this keyword ? 3 create an object to that class and pass (1234, Dana) as parameters Ps : write your code in eclipse and send it as screen shotpublic Account (double initialBalance){balance = initialBalance;}public Account () {balance = 0;}public void deposit (double amount){balance += amount; // Balance = balance + amount}public void withdraw (double amount){balance -= amount; // balance = balance - amount}public void close (){balance = 0;}public String toString(){return "balance: " + balance;}} Modify the Account class by adding two instance variables containing the customer's name and the account number. Both will be String objects. Modify the primary constructor for the Account class so that it takes three parameters: the balance, the customer's name, and the account number. Add instance methods named getCustomerName and getAccountNumber that return the customer name and account number.This is the question - Create a class named Rock that acts as a superclass for rock samples collected and catalogued by a natural history museum. The Rock class contains the following fields: sampleNumber - of type int description - A description of the type of rock (of type String) weight - The weight of the rock in grams (of type double) Include a constructor that accepts parameters for the sample number and weight. The Rock constructor sets the description value to "Unclassified". Include get methods for each field. Create three child classes named IgneousRock, SedimentaryRock, and MetamorphicRock. The constructors for these classes require parameters for the sample number and weight. Search the Internet for a brief description of each rock type and assign it to the description field using a method named setDescription inside of the constructor. This is the code I have, the program does not like at all what I have - import java.util.*; public class DemoRock { public static…