Java: An Introduction to Problem Solving and Programming (7th Edition)
7th Edition
ISBN: 9780133766264
Author: Walter Savitch
Publisher: PEARSON
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Chapter 8, Problem 4PP
Program Plan Intro
Displaying right triangle, rectangle, and square along with their areas and perimeters
Program Plan:
Filename: Test.java
- • Define main function.
- ○ Create the objects for “RightTriangle”, “Rectangle”, and “Square” classes and pass the input value to the respective methods.
- ○ Call the “drawHere” method with “RightTriangle” object “rt”.
- ○ Call the “findArea” and “findCircumference” methods with “RightTriangle” object “rt”.
- ○ Call the “drawHere”, and “drawAt” methods with “Rectangle” object “r”.
- ○ Call the “findArea” and “findCircumference” methods with “Rectangle” object “r”.
- ○ Call the “drawHere”, and “drawAt” methods with “Square” object “s”.
- ○ Call the “findArea” and “findCircumference” methods with “Square” object “s”.
- ○ Display the all the outputs.
Filename: RightTriangle.java
- • Define the “RightTriangle.java” class extends from “ShapeBase” class that implements “ShapeInterface”.
- • Declare the required variables.
- • Define the default constructor, and constructor for the class.
- • Define the “set” method.
- ○ Set the value.
- • Define “drawHere” method.
- ○ Call the “drawTop” method.
- • Define the “drawTop” method.
- ○ Declare the variable “startOfLine” and assign the value of offset plus base divided by 2.
- ○ Call the “skipSpaces()” method with “startOfLine” value.
- ○ Display the “*” character.
- ○ Declare the variable “lineCount” and assign the value of base divided by 2 minus 1.
- ○ Declare the “insideWidth” with value 1.
- ○ The “for” condition is used to display the “*” character in triangle shape.
- ■ Decrement the “startOfLine” value.
- ■ Call the “skipSpaces()” method with “startOfLine” value.
- ■ Display the “*” character.
- ■ Call the “skipSpaces()” method with “insideWidth” value.
- ■ Display the “*” character.
- ■ Increment the “insideWidth” value by 1.
- ○ Call the “drawBase” method with an argument.
- • Define “drawBase” method.
- ○ Call the “skipSpaces()” method.
- ○ Display the “*” character in base of the triangle.
- • Define “skipSpaces()” method.
- ○ Display the space.
- • Define the “findArea” method.
- ○ Return the area of right triangle.
- • Define the “findCircumference” method.
- ○ Return perimeter of the right triangle.
Filename: Rectangle.java
- • Define the “Rectangle.java” class extends from “ShapeBase” class that implements “ShapeInterface”.
- • Include all the methods in the Listing 8.13 in chapter 8.
- • Define another constructor with two parameters.
- ○ Set the values.
- • Define the “findArea” method.
- ○ Return the area of rectangle.
- • Define the “findCircumference” method.
- ○ Return perimeter of the rectangle.
Filename: Square.java
- • Define the “Sqaure.java” class which extends from the “Rectangle” class that implements “ShapeInterface”.
- • Declare the required variables.
- • Define the constructor for the class.
- • Define the accessor and mutator methods.
- • Define the “findArea” method.
- ○ Return the area of square.
- • Define the “findCircumference” method.
- ○ Return perimeter of the square.
Filename: ShapeInterface.java
Define the interface “SpaceInterface”.
- • Declare the “setOffset()” method.
- • Declare the “getOffset()” method.
- • Declare the “drawAt()” method.
- • Declare the “drawHere()” method.
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Chapter 8 Solutions
Java: An Introduction to Problem Solving and Programming (7th Edition)
Ch. 8.1 - Prob. 1STQCh. 8.1 - Suppose the class SportsCar is a derived class of...Ch. 8.1 - Suppose the class SportsCar is a derived class of...Ch. 8.1 - Can a derived class directly access by name a...Ch. 8.1 - Can a derived class directly invoke a private...Ch. 8.1 - Prob. 6STQCh. 8.1 - Suppose s is an object of the class Student. Base...Ch. 8.2 - Give a complete definition of a class called...Ch. 8.2 - Add a constructor to the class Student that sets...Ch. 8.2 - Rewrite the definition of the method writeoutput...
Ch. 8.2 - Rewrite the definition of the method reset for the...Ch. 8.2 - Can an object be referenced by variables of...Ch. 8.2 - What is the type or types of the variable(s) that...Ch. 8.2 - Prob. 14STQCh. 8.2 - Prob. 15STQCh. 8.2 - Consider the code below, which was discussed in...Ch. 8.2 - Prob. 17STQCh. 8.3 - Prob. 18STQCh. 8.3 - Prob. 19STQCh. 8.3 - Is overloading a method name an example of...Ch. 8.3 - In the following code, will the two invocations of...Ch. 8.3 - In the following code, which definition of...Ch. 8.4 - Prob. 23STQCh. 8.4 - Prob. 24STQCh. 8.4 - Prob. 25STQCh. 8.4 - Prob. 26STQCh. 8.4 - Prob. 27STQCh. 8.4 - Prob. 28STQCh. 8.4 - Are the two definitions of the constructors given...Ch. 8.4 - The private method skipSpaces appears in the...Ch. 8.4 - Describe the implementation of the method drawHere...Ch. 8.4 - Is the following valid if ShapeBaSe is defined as...Ch. 8.4 - Prob. 33STQCh. 8.5 - Prob. 34STQCh. 8.5 - What is the difference between what you can do in...Ch. 8.5 - Prob. 36STQCh. 8 - Consider a program that will keep track of the...Ch. 8 - Implement your base class for the hierarchy from...Ch. 8 - Draw a hierarchy for the components you might find...Ch. 8 - Suppose we want to implement a drawing program...Ch. 8 - Create a class Square derived from DrawableShape,...Ch. 8 - Create a class SchoolKid that is the base class...Ch. 8 - Derive a class ExaggeratingKid from SchoolKid, as...Ch. 8 - Create an abstract class PayCalculator that has an...Ch. 8 - Derive a class RegularPay from PayCalculator, as...Ch. 8 - Create an abstract class DiscountPolicy. It should...Ch. 8 - Derive a class BulkDiscount from DiscountPolicy,...Ch. 8 - Derive a class BuyNItemsGetOneFree from...Ch. 8 - Prob. 13ECh. 8 - Prob. 14ECh. 8 - Create an interface MessageEncoder that has a...Ch. 8 - Create a class SubstitutionCipher that implements...Ch. 8 - Create a class ShuffleCipher that implements the...Ch. 8 - Define a class named Employee whose objects are...Ch. 8 - Define a class named Doctor whose objects are...Ch. 8 - Create a base class called Vehicle that has the...Ch. 8 - Create a new class called Dog that is derived from...Ch. 8 - Define a class called Diamond that is derived from...Ch. 8 - Prob. 2PPCh. 8 - Prob. 3PPCh. 8 - Prob. 4PPCh. 8 - Create an interface MessageDecoder that has a...Ch. 8 - For this Programming Project, start with...Ch. 8 - Modify the Student class in Listing 8.2 so that it...Ch. 8 - Prob. 8PPCh. 8 - Prob. 9PPCh. 8 - Prob. 10PP
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