1)Create a complete Java class that can be used to create a Computer object as described below: A Computer has a: - Manufacturer - Disk Size - Manufacturing Date - Number of cores a) Add all instance variables (data encapsulation is expected). b) The class must have getters and setters for all instance variables. c) The class must have two constructors: a no-arg constructor and a constructor that receives input parameters for each instance variable. d) Implement a toString() method for your class. 2)Write a Java program TestComputer, which creates three Computer objects with the information below: a) - Manufacturer: Dell - Disk Size: 1189160321024 bytes - Manufacturing Date: April 1, 2020 - Number of cores: 2 b) - Manufacturer: Apple Inc - Disk Size: 269283712040 bytes - Manufacturing Date: March 31, 2020 - Number of cores: 4 c) Create your own Object. You can mimic your actual personal computer or use a no-args constructor. Print the three objects using toString() method to show all data fields

class A {protected int x1,y1,z; public: A(a, b,c):x1(a+2),y1(b-1),z(c+2) { for(i=0; i<5;i++) x1++;y1++;z++;}}; class B {protected: int x,y; public: B(a,b):x(a+1),y(b+2) { for(i=0; i<5;i++) x+=2; y+=1;}}; class D:public B, virtual public A { private: int a,b; public: D(k,m,n): a(k+n), B(k,m),b(n+2),A(k,m,n) { a=a+1;b=b+1;}}; int main() (Dob(4,2,5);} what the values of x1,y1 and z

1). Write a java abstract class called Solid and you will derive two classes – Cylinder and Sphere – from Solid. The class Solid Member variables type whose data type is String. For example, the type could be sphere, cube, parallelepiped. 2). The methods should include: A default or null constructor A constructor that initializes the value of type Getters and Setters An abstract method to find volume whose signature is public abstract double findVolume(); An abstract method to find surface area whose signature is public abstract double findSurfaceArea() a toString method that returns a string like the following Solid Type: Sphere an equals method that returns true if two Solid objects have the same type and false otherwise. 3). The class Cylinder - Cylinder will extend Solid Member variables: Cylinder inherits type from Solid radius of type double height of type double Methods: a default or null constructor a constructor that initializes type, radius, and height. type will always...

What is the main difference between a struct and a class? (More than 1 answer can be chosen)

Instructions-Java Assignment is to define a class named Address. The Address class will have three private instance variables: an int named street_number a String named street_name and a String named state. Write three constructors for the Address class: an empty constructor (no input parameters) that initializes the three instance variables with default values of your choice, a constructor that takes the street values as input but defaults the state to "Arizona", and a constructor that takes all three pieces of information as input Next create a driver class named Main.java. Put public static void main here and test out your class by creating three instances of Address, one using each of the constructors. You can choose the particular address values that are used. I recommend you make them up and do not use actual addresses. Run your code to make sure it works. Next add the following public methods to the Address class and test them from main as you go: Write getters and...