Java: An Introduction to Problem Solving and Programming (7th Edition)
7th Edition
ISBN: 9780133766264
Author: Walter Savitch
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 5, Problem 2P
Define a class called Counter. An object of this class is used to count things, so it records a count that is a nonnegative whole number. Include methods to set the counter to 0, to increase the count by 1, and to decrease the count by 1. Be sure that no method allows the value of the counter to become negative. Also include an accessor method that returns the current count value, as well as a method that displays the count on the screen. Do not define an input method. The only method that can set the counter is the one that sets it to zero. Write a
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
Exercise 1:
Write a Java application that simulates a test. The test contains at least five questions about first three lectures of this course. Each question should be a multiple-choice question with 4 options.
Design a Test class. Use programmer-defined methods to implement your solution. For example:
create a method to simulate the questions – simulateQuestion
create a method to check the answer – checkAnswer
create a method to display a random message for the user – generateMessage
create a method to interact with the user - inputAnswer
Display the questions using methods of JOptionPane class. Use a loop to show all the questions.
For each question:
If the user finds the right answer, display a random congratulatory message (“Excellent!”,”Good!”,”Keep up the good work!”, or “Nice work!”).
If the user responds incorrectly, display an appropriate message and the correct answer (“No. Please try again”, “Wrong. Try once more”, “Don't give up!”, “No. Keep trying..”).
Use…
JAVA Write a class that calculates add, subtraction, and multiplication. The class should include the following methods:
Constructor : initialize all values to 0
getAsk() : Ask users to input two integer numbers. This method calls Distribute() method.
Distribute() : Ask users to choose which calculation he/she wants. This method calls a method that can add, subtract, or multiply based on the user's option.
CalAdd() : add two numbers
CalSub() : subtract two numbers
CalProduct() : multiply two numbers
toString() : toString method that display result of operation.
The program should be designed to test the class developed. Your program might look like the following:
public class CalculateNumTesting{
public static void main(String[] args){
CalculateNum calculation = new CalculateNum();
calculation.getAsk();
System.out.println(calculation);
}
}
Eclipise
Exercise 1:
Write a Java application that simulates a test. The test contains at least five questions about first three lectures of this course. Each question should be a multiple-choice question with 4 options.
Design a Test class. Use programmer-defined methods to implement your solution. For example:
create a method to simulate the questions – simulateQuestion
create a method to check the answer – checkAnswer
create a method to display a random message for the user – generateMessage
create a method to interact with the user - inputAnswer
Display the questions using methods of JOptionPane class. Use a loop to show all the questions.
For each question:
If the user finds the right answer, display a random congratulatory message (“Excellent!”,”Good!”,”Keep up the good work!”, or “Nice work!”).
If the user responds incorrectly, display an appropriate message and the correct answer (“No. Please try again”, “Wrong. Try once more”, “Don't give up!”, “No. Keep…
Chapter 5 Solutions
Java: An Introduction to Problem Solving and Programming (7th Edition)
Ch. 5.1 - Consider the program in Listing 5.4 . Suppose you...Ch. 5.1 - Prob. 2STQCh. 5.1 - Prob. 3STQCh. 5.1 - Suppose every species in the world has a peculiar...Ch. 5.1 - Revise the definition of the method writeOutput in...Ch. 5.1 - Revise the definition of the method readInput in...Ch. 5.1 - Revise the definition of the method...Ch. 5.1 - What is the meaning of (int) that appears in the...Ch. 5.1 - Prob. 9STQCh. 5.1 - Define a method called getDensity that could be...
Ch. 5.1 - Define a method called changePopulation that could...Ch. 5.1 - Define a method called changePopulation that could...Ch. 5.2 - In Listing 5.12, we set the data for the object...Ch. 5.2 - Give preconditions and postconditions for the...Ch. 5.2 - What is an accessor method? What is a mutator...Ch. 5.2 - Give the complete definition of a class called...Ch. 5.2 - Prob. 17STQCh. 5.2 - In the definition of the method in Listing 5.15,...Ch. 5.2 - What is a well-encapsulated class definition?Ch. 5.2 - When should an instance variable in a class...Ch. 5.2 - Prob. 21STQCh. 5.2 - In a class definition, is anything private ever...Ch. 5.2 - In a class definition, is the body of any method...Ch. 5.3 - What is a reference type? Are class types...Ch. 5.3 - When comparing two quantities of a class type to...Ch. 5.3 - Prob. 26STQCh. 5.3 - Write a method definition for a method called...Ch. 5.3 - Given the class Species as defined in Listing...Ch. 5.3 - After correcting the program in the previous...Ch. 5.3 - What is the biggest difference between a parameter...Ch. 5.3 - Prob. 31STQCh. 5.3 - Write an equals method for the class Person...Ch. 5.4 - Prob. 33STQCh. 5.4 - Prob. 34STQCh. 5.4 - Prob. 35STQCh. 5.4 - Prob. 36STQCh. 5.4 - Prob. 37STQCh. 5 - Design a class to represent a credit card. Think...Ch. 5 - Repeat Exercise 1 for a credit card account...Ch. 5 - Repeat Exercise 1 for a coin instead of a credit...Ch. 5 - Repeat Exercise 1 for a collection of coins...Ch. 5 - Consider a Java class that you could use to get an...Ch. 5 - Consider a class that keeps track of the sales of...Ch. 5 - Consider a class MotorBoat that represents...Ch. 5 - Prob. 8ECh. 5 - Prob. 9ECh. 5 - Prob. 10ECh. 5 - Write a program to answer questions like the...Ch. 5 - Define a class called Counter. An object of this...Ch. 5 - Prob. 3PCh. 5 - Define a Trivia class that contains information...Ch. 5 - Define a Beer class that contains the following...Ch. 5 - Write a grading program for an instructor whose...Ch. 5 - Add methods to the Person class from Self-Test...Ch. 5 - Create a class that represents a grade...Ch. 5 - Write a program that uses the Purchase class in...Ch. 5 - Write a program to answer questions like the...Ch. 5 - Consider a class that could be used to play a game...Ch. 5 - Consider a class BasketballGame that represents...Ch. 5 - Consider a class ConcertPromoter that records the...Ch. 5 - Prob. 9PPCh. 5 - Consider a class Movie that contains information...Ch. 5 - Repeat Programming Project 18 from Chapter 4, but...Ch. 5 - Prob. 12PP
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
The job of the _____ is to fetch instructions, carry out the operations commanded by the instructions, and prod...
Starting Out With Visual Basic (8th Edition)
Write a program that inputs the name, quantity, and price of three items. The name may contain spaces. Output a...
Absolute Java (6th Edition)
Suppose that you are still writing the same program that we discussed in the previous two exercises and you rea...
Problem Solving with C++ (9th Edition)
Why is the CPU the most important component in a computer?
Starting Out with Python (4th Edition)
Write a program that computes the annual after-tax cost of a new house for the first year of ownership. The cos...
Problem Solving with C++ (10th Edition)
Explain why incremental development is the most effective approach for developing business software systems. Wh...
Software Engineering (10th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- Slide Type Slide • Exercise # 1: Define a class Point that represents a point in 2 – D plane. The point has x and y coordinates. Define the following: • A constructor to initialize the x, y coordinates. • A method translate(self, dx,dy) to translate the point object dx , and dy units in x and y directions, respectively. • A method distanceTo (self, point2) to return the distance between the point referenced by self and point2. • getX(self) to return the value of x coordinate. • getY(self) to return the value of y coordinate Test the above class by: • Creating 2 point objects; one with (3,5) as x,y coordinates; the second with (-10,30) as x,y coordinates. • Move the first point 5.5 units in x direction and -12.5 units in y direction using translate method • Find the distance between the 2 points in their current location using distance To method A Sample output resulting from running the above test class is shown below new coordinates of point1= (8.5 , -7.5) Coordinates of point 2 =…arrow_forward//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 }arrow_forwardIn this exercise, you have to implement a calculator which can perform addition, subtraction, multiplication, and division. Problem Statement# Write a Java class called Calculator with ● private fields: ○ num1 and num2 (double type) And methods: ● add(), a method which returns the addition of two numbers ● subtract(), a method which returns the subtraction of num1 from num2 ● multiply(), a method which returns the multiplication of numbers ● divide(), a method which returns the division of num2 by num1 ● Define a parameterized constructor which takes two parameters num1 and num2 and assigns these variables to the respective fields in the class. Input# Pass double point numbers in the parameterized constructor Output# addition, subtraction, division, and multiplication Sample Input# Calculator obj = new Calculator(10, 94); obj.add() obj.subtract() obj.multiply() obj.divide() Sample Output# 104 84 940 9.4 Part of the Solution class Calculator { // write class fields here public…arrow_forward
- At most, a class can contain ____________ method(S). 0 1 2 any number ofarrow_forwardExercise 2: The intersection method computes the intersection of two rectangles- that is, the rectangle that would be formed by two overlapping rectangles if they were drawn, as shown at right. You call this method as follows: Rectangle r3 = r1.intersection (r2); Write a program IntersectionPrinter that constructs two rectangle objects, prints them as described in Exercise 1, and then prints the rectangle Intersection object that describes the intersection. Then the program should print the result of the intersection method when the rectangles do not overlap. Add a comment to your program that explains how you can tell whether the resulting rectangle is empty. The random class implements a random number generator, which produces sequences of numbers that appear to be random. To generate random integers, you construct an object of the Random class, and then apply the nextInt (50) gives you a random number between 0 and 49. Use the Random class to construct the two rectangle objects.arrow_forwardInstructions This assignment must follow directions exactly. Create a class Lab02 with a main method, and put all of the following code into the main method: Print the prompt shown below and ask the user for the number of exemptions. The number of exemptions is an integer. Print the prompt shown below and ask the user for their gross salary. The gross salary represents dollars, which can be entered with or without decimal points. Print the prompt shown below and ask the user for their interest income. The interest income represents dollars, which can be entered with or without decimal points. Print the prompt shown below and ask the user for their capital gains income. The capital gains represents dollars, which can be entered with or without decimal points. Print the prompt shown below and ask the user for the amount of charitable contributions. The charitable contributions represents dollars, which can be entered with or without decimal points. Perform the calculation of…arrow_forward
- Ag 1- Random Prime Generator Add a new method to the Primes class called genRandPrime. It should take as input two int values: 1owerBound and upperBound. It should return a random prime number in between TowerBound (inclusive) and upperBound (exclusive) values. Test the functionality inside the main method. Implementation steps: a) Start by adding the method header. Remember to start with public static keywords, then the return type, method name, formal parameter list in parenthesis, and open brace. The return type will be int. We will have two formal parameters, so separate those by a comma. b) Now, add the method body code that generates a random prime number in the specified range. The simplest way to do this is to just keep trying different random numbers in the range, until we get one that is a prime. So, generate a random int using: int randNum = lowerBound + gen.nextInt(upperBound); Then enter put a while loop that will keep going while randNum is not a prime number - you can…arrow_forwardDesign a class that holds the following personal data: name, address, age, and phone number. Write appropriate accessor and mutator methods. Also, design a program that creates three instances of the class. One instance should hold your information, and the other two should hold your friends’ or family members’ information. very basic Algorithm in pseudocode. Use fictitious information.arrow_forwardprivate float c; private void method2(double y) { c = y; } in another class we created an object of the first class then within in it : tester.method2 (10.0f); are there any errors ? how many errors if there are any and with explanation please.arrow_forward
- Suppose you have a class named Candy imported and you instantiate an object named reeses. Also, suppose that the Candy class has a method named getFlavor, which requires no arguments. Type the line of code that would run the method getFlavor on the reeses object.arrow_forwardDefine a class named CandyDistributor. A CandyDistributor object represents a hungry child who is going to divide a set of candies between herself and her hungry sibling. This will be done fairly by alternating who gets a candy. Each CandyDistributor object should have the following method: public void nextCandy() Each time nextCandy is called, the method prints a message about who gets a candy, and how many candies that person has. Each call to nextCandy produces a single line of output. The code below constructs a CandyDistributor object and calls its nextCandy 8 times. The output appears at right. public class TestCandy { public static void main(String[] args) { CandyDistributor nice = new CandyDistributor(); nice.nextCandy(); // 1 for you. nice.nextCandy(); // 1 for me. nice.nextCandy(); // 2 for you. nice.nextCandy(); // 2 for me. nice.nextCandy(); // 3 for you. nice.nextCandy();…arrow_forwardClass RightTriangle Represents a right triangle by the length of each of its two legs Includes the default and overloaded constructor, methods to set the length of each of the two legs, amethod to get the area, a method to scale the size of the triangle, a method to invert the triangle(swap the lengths of its two legs), and a method to print its dimensions.Class TestRightTriangle Creates and initializes two triangles. Calls the various associated methods to set its size, compute its area, scale its size, invert, and print itsdimensions.You are required to implement both classes according to the requirements specified in the commentsdisplayed in the .java files. The following is an example of possible output:triangle1 dimensions: 6.0 3.5triangle1 area: 10.5triangle2 dimensions: 3.0 4.0triangle2 area: 6.0triangle1 dimensions: 18.0 10.5triangle2 dimensions: 5.5 6.5triangle1 dimensions: 4.5 2.625triangle1 dimensions after invert: 2.625 4.5A few details: Do NOT modify any of the code…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Microsoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,
EBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
Microsoft Visual C#
Computer Science
ISBN:9781337102100
Author:Joyce, Farrell.
Publisher:Cengage Learning,
EBK JAVA PROGRAMMING
Computer Science
ISBN:9781337671385
Author:FARRELL
Publisher:CENGAGE LEARNING - CONSIGNMENT
Introduction to Classes and Objects - Part 1 (Data Structures & Algorithms #3); Author: CS Dojo;https://www.youtube.com/watch?v=8yjkWGRlUmY;License: Standard YouTube License, CC-BY