Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
6th Edition
ISBN: 9780134477367
Author: David J. Barnes, Michael Kolling
Publisher: PEARSON
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Chapter 11, Problem 14E
Program Plan Intro
To identify whether given code will compile successfully or not.
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//Todo write test cases for SimpleCalculator Class
// No need to implement the actual Calculator class just write Test cases as per TDD.
// you need to just write test cases no mocking // test should cover all methods from calculator and all scenarios, so a minimum of 5 test
// 1 for add, 1 for subtract, 1 for multiply, 2 for divide (1 for normal division, 1 for division by 0)
// make sure all these test cases fail
public class CalculatorTest {
//Declare variable here
private Calculator calculator;
//Add before each here
//write test cases here
}
Method Overloading is a feature that allows a class to have two or more methods having
same name, if their argument lists are different. Argument lists could differ in:
1. Number of parameters.
2. Data type of parameters.
3. Sequence of Data type of parameters.
Write different version of method sum() that display the sum of the values received as
parameter according to the following main method content:
public static void main(String[] args)
{
sum ( 10, 10 );
sum ( 10, 10, 10 );
sum ( 10.0, 10.0 );
sum ( 10, 10.0 );
sum ( 10.0, 10);
}
You have to define five functions with the specified types. Then, demonstrate the Argument
Promotion concept by reducing the number of method to two.
1. Modify the method beginsWithVowel. Use a different way to implement the method (try method indexOf() from the String class).
2. Modify the driver class to iteratively ask the user to enter a sentence, and then translate the sentence, until the user decides to quit the program.
import java.util.Scanner;public class Translator {
//instance variables
//constructors
//methods
public static String translate(String sentence)// My name is Patrick Casseus { String result = ""; sentence = sentence.toLowerCase(); Scanner scan = new Scanner(sentence);
while(scan.hasNext()) { result = result += translateWord(scan.next()) + " "; }
return result; }
private static String translateWord(String word) { String result = "";
if(startWithVowel(word)) result = word + "yay"; else if(startWithBlend(word)) // chair -> air + ch + ay result = word.substring(2) +…
Chapter 11 Solutions
Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
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