1)Create two Java classes, Desktop and Laptop that both are subclasses of Computer.a) A Desktop has additional instance variables: width and height (data encapsulation isexpected)b) A Laptop has an additional instance variable, weight (data encapsulation is expected).c) Write constructors for both classes that require input for all their instance variables(including Manufacturing Date, Disk size, Number of cores and Color) and no-argsconstructors.d) Create getters and setters for all instance variables for both Child classes.e) Create toString() methods in Desktop and Laptop. 2) Test Two Child ClassesTest your newly created subclasses inside the same TestComputer program you previouslycreated: create two new Laptops and two new Desktops with the data of your choice. UsetoString() method to show all data fields (including the data fields in the super class and sub class). ➡ eclipse-workspace - project2/src/project2/TestComputer.java - Eclipse IDEFile Edit Source Refactor Navigate Search Project Run Window HelpQ- 2C음...TestPrintPri...1 package project2;2 public class TestComputer3 {{project.java4 public static void main(String[] args)56789101112 System.out.println (cl);13 System.out.println();14 System.out.println (c2);}49°FClear15 System.out.println();16System.out.println (c3);171819 }2021#Difference.java//Printing the information▬▬▬▬▬Table.java//Creating 3 objects.Computer cl = new Computer ("Dell", "1189160321024", "April 1, 2020", 2);Computer c2 = new Computer ("Apple Inc", "269283712040", "March 31, 2020", 4);Computer c3 = new Computer ("Microsoft", "267950430223", "june 30, 2021", 6);Q Search↓➡MoreArith.javaHerjames_Pr...WritableaComputer.javaSmart InsertTestCompute... XDesktop.java16:26: 537Laptop.java89a8:02 PM4/3/2023X* * * + @ 隐旦8%鼎2凰@ ◆ eclipse-workspace - project2/src/project2/Computer.java - Eclipse IDEFile Edit Source Refactor Navigate Search Project Run Window Help- 2#CDifference.java295.TestPrintPri...1 package project2;23468910C11121314151617Č===================19$20212223242526$27$28298303132333638Ⓒ39404142class Computer0private String Manufacturer;private String DiskSize/private String ManufacturingDate;private int NumberOfCores///no-arg constructorpublic Computer (){1[1project.java//parameterised constructorpublic Computer (String Manufacturer, String DiskSize, String ManufacturingDate, int NumberOfCores)Manufacturer - ManufacturingDate "";DiskSize = "";NumberOfCores - 0;//Catter methodsthis.Manufacturer - Manufacturer;this.ManufacturingDate - ManufacturingDate;this.DiskSize - DiskSize;this.NumberOfCores NumberOfCores;public String getManufacturer() { return Manufacturer; 1//Setter methodspublic String getManufacturingDate() { return ManufacturingDate: 1public String getDiskSize() { return DiskSize: 1public int get NumberOfCores () { return NumberOfCores; 1149°FClearpublic void setManufacturer (String x) [ Manufacturer - x; 1public void setManufacturingDate (String x) [ ManufacturingDate - x; }public void setDiskSize(String x) [DiskSize - x: 1public void setNumberOfCores (int x) [NumberOfCores - x: 1Table.java▬▬▬▬▬↓MoreArith.javapublic String tostring(){return "Manufacturer: " + Manufacturer + "\nManufacturing Date: " + ManufacturingDate + "\nDisk Size: " + DiskSize + "bytes" + "\nNumber of Cores: " + NumberOfCores;Q Search♡ ♡Herjames_Pr...WritableComputer.java X TestCompute...aSmart Insert42:2:1474Desktop.javaLaptop.java89a8:03 PM4/3/2023X* * * + @ 隐旦8%鼎2@@

Create a new package called "project2". Define a public class named "Computer" inside the "project2"…

Answered: 1)Create two Java classes, Desktop and…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

1)Create two Java classes, Desktop and Laptop that both are subclasses of Computer.
a) A Desktop has additional instance variables: width and height (data encapsulation is
expected)
b) A Laptop has an additional instance variable, weight (data encapsulation is expected).
c) Write constructors for both classes that require input for all their instance variables
(including Manufacturing Date, Disk size, Number of cores and Color) and no-args
constructors.
d) Create getters and setters for all instance variables for both Child classes.
e) Create toString() methods in Desktop and Laptop.

2) Test Two Child Classes
Test your newly created subclasses inside the same TestComputer program you previously
created: create two new Laptops and two new Desktops with the data of your choice. Use
toString() method to show all data fields (including the data fields in the super class and sub class).

➡ eclipse-workspace - project2/src/project2/TestComputer.java - Eclipse IDE
File Edit Source Refactor Navigate Search Project Run Window Help
Q
- 2
C
음...
TestPrintPri...
1 package project2;
2 public class TestComputer
3 {
{
project.java
4 public static void main(String[] args)
5
6
7
8
9
10
11
12 System.out.println (cl);
13 System.out.println();
14 System.out.println (c2);
}
49°F
Clear
15 System.out.println();
16
System.out.println (c3);
17
18
19 }
20
21
#
Difference.java
//Printing the information
▬▬
▬▬▬
Table.java
//Creating 3 objects.
Computer cl = new Computer ("Dell", "1189160321024", "April 1, 2020", 2);
Computer c2 = new Computer ("Apple Inc", "269283712040", "March 31, 2020", 4);
Computer c3 = new Computer ("Microsoft", "267950430223", "june 30, 2021", 6);
Q Search
↓➡
MoreArith.java
Herjames_Pr...
Writable
a
Computer.java
Smart Insert
TestCompute... XDesktop.java
16:26: 537
Laptop.java
89
a
8:02 PM
4/3/2023
X
* * * + @ 隐旦
8
%
鼎
2
凰
@

◆ eclipse-workspace - project2/src/project2/Computer.java - Eclipse IDE
File Edit Source Refactor Navigate Search Project Run Window Help
- 2
#C
Difference.java
2
95.
TestPrintPri...
1 package project2;
2
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10C
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Č===================
19
$20
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$28
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class Computer
0
private String Manufacturer;
private String DiskSize/
private String ManufacturingDate;
private int NumberOfCores/
//no-arg constructor
public Computer ()
{
1
[
1
project.java
//parameterised constructor
public Computer (String Manufacturer, String DiskSize, String ManufacturingDate, int NumberOfCores)
Manufacturer - ManufacturingDate "";
DiskSize = "";
NumberOfCores - 0;
//Catter methods
this.Manufacturer - Manufacturer;
this.ManufacturingDate - ManufacturingDate;
this.DiskSize - DiskSize;
this.NumberOfCores NumberOfCores;
public String getManufacturer() { return Manufacturer; 1
//Setter methods
public String getManufacturingDate() { return ManufacturingDate: 1
public String getDiskSize() { return DiskSize: 1
public int get NumberOfCores () { return NumberOfCores; 1
1
49°F
Clear
public void setManufacturer (String x) [ Manufacturer - x; 1
public void setManufacturingDate (String x) [ ManufacturingDate - x; }
public void setDiskSize(String x) [DiskSize - x: 1
public void setNumberOfCores (int x) [NumberOfCores - x: 1
Table.java
▬▬
▬▬▬
↓
MoreArith.java
public String tostring()
{
return "Manufacturer: " + Manufacturer + "\nManufacturing Date: " + ManufacturingDate + "\nDisk Size: " + DiskSize + "bytes" + "\nNumber of Cores: " + NumberOfCores;
Q Search
♡ ♡
Herjames_Pr...
Writable
Computer.java X TestCompute...
a
Smart Insert
42:2:1474
Desktop.java
Laptop.java
89
a
8:03 PM
4/3/2023
X
* * * + @ 隐旦
8
%
鼎
2
@
@

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