Given the classes above, what output is produced by the following code?
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Given the classes above, what output is produced by the following code?
CClass[] elements = {new AClass(), new BClass(), new CClass(), new DClass()};
for (int i = 0; i < elements.length; i++) {
System.out.println(elements[i]);
elements[i].method1();
System.out.println();
elements[i].method2();
System.out.println();
System.out.println();
}
Please answer both. Thank you.
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- 8. OOPS Theory #6 public class Car { public void horn() { System.out.println("Horn horn"); } } public class Ferrari extends Car { public void horn() { System.out.println("Ferarriiiiii"); } } public static void main(String[] args) { Ferrari ferrari = new Car(); ferrari.horn(); } Pick ONE option Horn horn Ferarriiii Cannot compile Runtime exception Clear Selection 9. OOPS Theory #7 In Java, we can achieve the abstraction by creating the blueprint of an object and only have abstract methods. What do we call this? Pick ONE option Interface Encapsulation Instance Protected Clear SelectionWhat is outpout? public class Vehicle { public void drive(){ System.out.println("Driving vehicle"); } public class Plane extends Vehicle { @Override public void drive(){ System.out.println("Flying plane"); } public static void main(String args[]) { Vehicle myVehicle myVehicle.drive(); } } = new Plane(); syntax error Driving vehicle Flying plane Flying plane O Driving vehiclepublic class Secret private int x; private static int y; public static int count; public int z; public Secret () } X ?t = 2 { public Secret (int a) } { public Secret (int a, int b) } { public String toString() return ("x = " count = " + count); { public static void incrementY () { { 54. How many constructors are present in the class definition above? C. 2 d. 3 b. 1 55. What does the default constructor do in the class definition above? a. Sets the value of x to 0 c. Sets the value of x to 0 and the value of z to 1 d. There is no default constructor. b. Sets the value of z to 1 56. Based on the class definition above, which of the following statements is illegal? Secret.incrementY (); b. Secret.count++3B a. c. Secret. 2++; d. None of these 13
- public class Animal { public void makeNoise() { System.out.println("talk"); }//end method makeNoise }//end class Animal public class Dog extends Animal { public void makeNoise() { System.out.println("Bark"); }/lend method makeNoise }//end class Dog What would the output of the following be? Explain your answer. Animal animal = new Animal(); animal.makeNoise(); Dog dog = new Dog(); dog.makeNoise(); Animal animaldog = new Dog(); animaldog.makeNoise();class Vehicle{String s = "This is my vehicle" ;}class Car extends Vehicle{String s = "This is my car" ;{System.out.println( super .s);}} class Truck extends Car{String s = "This is my truck" ;{System.out.println( super .s);}}public class MainClass{public static void main(String[] args){Truck t = new Truck ();System.out.println(t.s);}}class Student { private int age = 18; public Student() { age = 19; } } public class Test { public static void main (String[] args){ Student s = new Student(); System.out.println (s.age); } }
- public class Base { public void PrintName() { System.out.println("Base"); } static void PrintClass() { System.out.println("ClassBase"); } private void PrintPrivate() { System.out.println("PrintPrivate"); } class Derived extends Base { public void PrintName() { System.out.println("Derived"); } static void PrintClass() { System.out.println("ClassDerived"); } private void PrintPrivate() { System.out.println("PrintDerived"); } public static void main(String[] args) { Base x = new Derived(); Derived y = new Derived(); x.PrintClass(); y.PrintPrivate(); x.PrintName();public class LabProgram { public static void main(String args[]) { Course course = new Course(); String first; // first name String last; // last name double gpa; // grade point average first = "Henry"; last = "Cabot"; gpa = 3.5; course.addStudent(new Student(first, last, gpa)); // Add 1st student first = "Brenda"; last = "Stern"; gpa = 2.0; course.addStudent(new Student(first, last, gpa)); // Add 2nd student first = "Jane"; last = "Flynn"; gpa = 3.9; course.addStudent(new Student(first, last, gpa)); // Add 3rd student first = "Lynda"; last = "Robison"; gpa = 3.2; course.addStudent(new Student(first, last, gpa)); // Add 4th student course.printRoster(); } } // Class representing a student public class Student { private String first; // first name private String last; // last name private double gpa; // grade point average…toString() and equals() Methods This lab will demonstrate how the toString() and equals() methods work when they are not overridden. Type up the code and submit the BOTH results. CODE public class ObjectToString( public static void main(String[] args) { ClassOne co new ClassOne(); ClassTwo ct = new ClassTwo(); } } public class Classone { System.out.println(co); System.out.println(ct); System.out.println(co.equals(ct)); public void printfle() { System.out.println("I am from ClassOne"); } public class ClassTwo ( public void printMe() { } System.out.println("I am from ClassTwo"); Run the program and notice the output.
- Question 13 What is outpout? public class Vehicle { public void drive(){ System.out.println("Driving vehicle"); } } public class Plane extends Vehicle { @Override public void drive(){ System.out.println("Flying plane"); } public static void main(String args[]) { Vehicle myVehicle= = new Plane(); myVehicle.drive(); } Driving vehicle syntax error Flying plane Driving vehicle Flying plane }public class Car { public void m1() { System.out.Rrintln("car 1"); } public void m2() { super.m1(); } public void m2() { Sustem.out.printla("car 2"); } public String toString() { return super toString() + super toString(); } public String toString() { return "vroom"; } } Create a client class and add the following statements. What is the output? Is it the same as you expected? public class Truck extends Car { public void m1() { System.out.Rrintin("truck 1"); } Truck mytruck = new Truck (); Sustem.out.printinlaxtruckl: // Output: mytruck.m1(); mytruck.m2(); // Output: // Output:For the following four classes, choose the correct relationship between each pair. public class Room ( private String m type; private double m area; // "Bedroom", "Dining room", etc. // in square feet public Room (String type, double area) m type type; m area = area; public class Person { private String m name; private int m age; public Person (String name, int age) m name = name; m age = age; public class LivingSSpace ( private String m address; private Room[] m rooms; private Person[] m occupants; private int m countRooms; private int m countoccupants; public LivingSpace (String address, int numRooms, int numoccupants) m address = address; new int [numRooms]; = new int [numOceupants]; m rooms %3D D occupants m countRooms = m countOccupants = 0; public void addRoom (String type, double area)