Problem 1:Complete a properly encapsulated class named Shape, which has the following: -A Boolean instance variable named is Filled .-A String instance variable named color.- A default, no-arg constructor which sets isFilledto true, and colorto “Green”.-An overloaded constructor which takes two parameters, a Boolean and a String and sets the instance variables accordingly. -An overridden toString() method, which returns a String. The String should contain: The values of the instance variables in the following format:Filled: trueColor: Green Complete a properly encapsulated class named Rectangle, which inherits from Shapeand has the following:Two double instance variable named width and length.A default, no-arg constructor which sets length to 2 and width to 1.An overloaded constructor which takes two double parameter and sets theinstance variables width and length to the values passed in.Another overloaded constructor which takes four parameters, a double forwidth, a double for length, a boolean for isFilled and a String forcolor, and sets the instance variables accordingly, Hint: (Invoke thematching constructor from the superclass)!!Note that a rectangle has a length that is always greater than width.A void setLW() method which takes two parameters x and y, and set thelength instance variable to the largest value passed in and the width instancevariable to the smallest value passed in (Assume that x and y are alwayspositive and have different values), also call this method in the constructors,so your instance variables will always have legal values.A method named getArea() which calculates and returns the area of therectangle.An overridden toString() method. The returned String should contain:The value of the length, the value of the width, the area of the rectangle,then the result of calling the toString() method from the superclass, thereturn String should be formatted as follows:Width: 3.2Length: 4.0Area: 12.8Filled: falseColor: Red Complete a properly encapsulated class named Circle, which inherits from Shape andhas the following:A double instance variable named radius.A default, no-arg constructor which sets radius to 1.An overloaded constructor which takes one double parameter and sets theinstance variable radius to the value passed in.Another overloaded constructor which takes three parameters, a doublefor radius, a boolean for isFilled and a String for color, and setsthe instance variables accordingly, Hint:(Invoke the matching constructorfrom the superclass)!!A method named getArea() which calculates and returns the area of thecircle.An overridden toString() method. The returned String should contain:the value of radius, the area of the circle, then the result of calling thetoString() method from the superclass, the return String should beformatted as follows:Radius: 2.67Area: 22.396099868176275Filled: trueColor: Green

Answered: roblem 1: Complete a properly…

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

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Problem 1: Complete a properly encapsulated class named Shape, which has the following: -A Boolean instance variable named is Filled . -A String instance variable named color. - A default, no-arg constructor which sets isFilledto true, and colorto “Green”. -An overloaded constructor which takes two parameters, a Boolean and a String and sets the instance variables accordingly. -An overridden toString() method, which returns a String. The String should contain: The values of the instance variables in the following format: Filled: true Color: Green

Complete a properly encapsulated class named Rectangle, which inherits from Shape
and has the following:
Two double instance variable named width and length.
A default, no-arg constructor which sets length to 2 and width to 1.
An overloaded constructor which takes two double parameter and sets the
instance variables width and length to the values passed in.
Another overloaded constructor which takes four parameters, a double for
width, a double for length, a boolean for isFilled and a String for
color, and sets the instance variables accordingly, Hint: (Invoke the
matching constructor from the superclass)!!
Note that a rectangle has a length that is always greater than width.
A void setLW() method which takes two parameters x and y, and set the
length instance variable to the largest value passed in and the width instance
variable to the smallest value passed in (Assume that x and y are always
positive and have different values), also call this method in the constructors,
so your instance variables will always have legal values.
A method named getArea() which calculates and returns the area of the
rectangle.
An overridden toString() method. The returned String should contain:
The value of the length, the value of the width, the area of the rectangle,
then the result of calling the toString() method from the superclass, the
return String should be formatted as follows:
Width: 3.2
Length: 4.0
Area: 12.8
Filled: false
Color: Red

Complete a properly encapsulated class named Circle, which inherits from Shape and
has the following:
A double instance variable named radius.
A default, no-arg constructor which sets radius to 1.
An overloaded constructor which takes one double parameter and sets the
instance variable radius to the value passed in.
Another overloaded constructor which takes three parameters, a double
for radius, a boolean for isFilled and a String for color, and sets
the instance variables accordingly, Hint:(Invoke the matching constructor
from the superclass)!!
A method named getArea() which calculates and returns the area of the
circle.
An overridden toString() method. The returned String should contain:
the value of radius, the area of the circle, then the result of calling the
toString() method from the superclass, the return String should be
formatted as follows:
Radius: 2.67
Area: 22.396099868176275
Filled: true
Color: Green

Expert Solution

Step 1

Inheritance: It is an OOP concept where one class inherits all the methods and properties of another class.

Parent class is the class whose properties are being inherited.

Child class is the class that inherits from another class.

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