Java: An Introduction to Problem Solving and Programming (8th Edition)
8th Edition
ISBN: 9780134462035
Author: Walter Savitch
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Question
Chapter 6, Problem 2E
Program Plan Intro
Time calculation
Program plan:
- • Import necessary header files.
- • Define the class “Time”.
- ○ Declare the necessary variables.
- ○ Define the empty constructor “Time()”.
- ■ Initialize the necessary variables.
- ○ Define the parameterized constructor.
- ■ Declare the function “setTime()”.
- ○ Define the function “isValid()”.
- ■ Return the value.
- ○ Define the function “setTime()”.
- ■ Check the necessary condition.
- ■ Assign value to the necessary variables.
- ○ Define the function “getTime12()”.
- ■ Initialize the variable “response”.
- ■ Check the necessary condition.
- ■ Return, the value of the variable “response”.
- ○ Define the function “getTime24()”.
- ■ Initialize the variable “response”.
- ■ Check the necessary condition.
- ■ Return, the value of the variable “response”.
- ○ Define the function “toString()”.
- ■ Return the value.
- ○ Define the “main()” function.
- ■ Create object for the class “Time”.
- ■ Print the necessary statements.
- ■ Call the necessary methods to print the result on the screen.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Implement a class that simulates a traffic light. The next method advances the color in the usual way, from green to yellow to red, then again to green. Provide two constructors, as described in the documentation of the public interface. Also supply a method that yields the number of times that this traffic light has been red.
/** A simulated traffic light.*/public class TrafficLight{ private String color; private int reds; /** Constructs a green traffic light. */ public TrafficLight() { /* Your code goes here */ } /** Constructs a traffic light. @param initialColor the initial color "green", "yellow", or "red" */ public TrafficLight(String initialColor) { /* Your code goes here */ } /** Moves this traffic light to the next color. */ public void next() { /* Your code goes here */ } /** Returns the current color of this traffic light. @return the current color */ public String getColor() {…
Write a java program in a class CountPoor that counts the number of families that are considered poor. Write and use a class Family that has the attributes.
income—a double value that is the income for the family
size—the number of people in the family and the following methods:
Family(income, size)—a constructor that sets the attributes
isPoor(housingCost, foodCost)—a method that returns true if housingCost + foodCost * size is greater than half the family income (foodCost is the average food cost for an individual, while housingCost is for the family)
toString—a method that returns a string containing the information about the family
The program should read an integer k from the keyboard and then create an array of size k whose base type is Family. It should then create k objects of type Family and put them in the array, reading the income…
1/ Write a BankAccountTester class whose main method constructs a bank account, deposits $1,000, withdraws $500, withdraws another $400, and then prints the remaining balance. Also print the expected result
2/ Implement a class Employee. An employee has a name (a string) and a salary (a double). Provide a constructor with two arguments public Employee(String employeeName, double currentSalary) and methods
public String getName()
public double getSalary()
public void raiseSalary(double byPercent)
These methods return the name and salary, and raise the employee's salary by a certain percentage. Sample usage:
Employee harry = new Employee("Hacker, Harry", 50000);
harry.raiseSalary(10); // Harry gets a 10 percent raise
Supply an EmployeeTester class that tests all methods.
3/Implement a class Car with the following properties. A car has a certain fuel efficiency (measured in miles/gallon or liters/km—pick one) and a certain amount of fuel in the gas tank. The efficiency is specified in…
Chapter 6 Solutions
Java: An Introduction to Problem Solving and Programming (8th Edition)
Ch. 6.1 - If a class is named Student, what name can you use...Ch. 6.1 - When defining a constructor, what do you specify...Ch. 6.1 - What is a default constructor?Ch. 6.1 - Does every class in Java automatically have a...Ch. 6.1 - In the program PetDemo shown in Listing 6 2, you...Ch. 6.2 - Prob. 6STQCh. 6.2 - Can a class contain both instance variables and...Ch. 6.2 - Can you reference a static variable by name within...Ch. 6.2 - Can you reference an instance variable by name...Ch. 6.2 - Can you reference a static variable by name within...
Ch. 6.2 - Can you reference an instance variable by name...Ch. 6.2 - Is the following valid, given the class...Ch. 6.2 - Prob. 13STQCh. 6.2 - Prob. 14STQCh. 6.2 - Prob. 15STQCh. 6.2 - Is the following valid, given the class...Ch. 6.2 - What values are returned by each of the following?...Ch. 6.2 - Suppose that speed is a variable of type double...Ch. 6.2 - Repeat the previous question, but instead assign...Ch. 6.2 - Suppose that nl is of type int and n2 is of type...Ch. 6.2 - Define a class CircleCalculator that hat only two...Ch. 6.2 - Which of the following statements are legal?...Ch. 6.2 - Write a Java expression to convert the number in...Ch. 6.2 - Consider the variable 5 of type String that...Ch. 6.2 - Repeat the previous question, but accommodate a...Ch. 6.2 - Write Java code to display the largest and...Ch. 6.3 - Prob. 27STQCh. 6.3 - Consider the variable allCents in the method...Ch. 6.3 - What is wrong with a program that starts as...Ch. 6.3 - Prob. 30STQCh. 6.3 - In your definition of the class OutputFormat. In...Ch. 6.4 - Prob. 32STQCh. 6.4 - Prob. 33STQCh. 6.4 - Prob. 34STQCh. 6.4 - Consider the class Species in Listing 5.19 of...Ch. 6.4 - Repeat the previous question for a method...Ch. 6.4 - Still considering the class Species in Listing...Ch. 6.4 - Rewrite the method add in Listing 6.16 so that it...Ch. 6.4 - In Listing 6.16, the set method that has a String...Ch. 6.5 - Give the definitions of three accessor methods...Ch. 6.6 - If cardSuit is an instance of Suit and is assigned...Ch. 6.7 - Suppose you want to use classes in the package...Ch. 6.7 - Prob. 43STQCh. 6.7 - Can a package have any name you might want, or are...Ch. 6.7 - On your system, place the class Pet (Listing 6.1)...Ch. 6.8 - The previous section showed you how to change the...Ch. 6 - Prob. 1ECh. 6 - Prob. 2ECh. 6 - Write a default constructor and a second...Ch. 6 - Write a constructor for the class...Ch. 6 - Consider a class characteristic that will be used...Ch. 6 - Create a class RoomOccupancy that can be used to...Ch. 6 - Write a program that tests the class RoomOccupancy...Ch. 6 - Sometimes we would like a class that has just a...Ch. 6 - Create a program that tests the class Merlin...Ch. 6 - In the previous chapter, Self-Test Question 16...Ch. 6 - Create a class Android whose objects have unique...Ch. 6 - Prob. 12ECh. 6 - Modify the definition of the class Species in...Ch. 6 - Prob. 2PCh. 6 - Using the class Pet from Listing 6.1, write a...Ch. 6 - Do Practice Program 4 from Chapter 5 except define...Ch. 6 - The following class displays a disclaimer every...Ch. 6 - Do Practice Program 5 from Chapter 5 but add a...Ch. 6 - We can improve the Beer class from the previous...Ch. 6 - Define a utility class for displaying values of...Ch. 6 - Write a new class TruncatedDollarFormat that is...Ch. 6 - Complete and fully test the class Time that...Ch. 6 - Complete and fully test the class Characteristic...Ch. 6 - Write a Java enumeration LetterGrade that...Ch. 6 - Complete and fully test the class Per n that...Ch. 6 - Write a Temperature class that represents...Ch. 6 - Repeat Programming Project 8 of the previous...Ch. 6 - Write and fully test a class that represents...Ch. 6 - Write a program that will record the votes for one...Ch. 6 - Repeat Programming Project 10 from Chapter 5, but...Ch. 6 - Create a JavaFX application that displays a button...
Knowledge Booster
Similar questions
- Write a class called Investment with fields called principal and interest. The constructor should set the values of those fields. There should be a method called value_after that returns the value of the investment after n years. The formula for this is p(1+i)ⁿ, where p is the principal, and i is the interest rate.arrow_forwardImplement a class Car with the following properties. A car has a certain fuel efficiency(measured in miles/gallon or liters/km—pick one) and a certain amount of fuel in the gastank. The efficiency is specified in the constructor, and the initial fuel level is 0.Supply a method drive that simulates driving the car for a certain distance, reducing theamount of gasoline in the fuel tank. Also supply methods getGasInTank, returning thecurrent amount of gasoline in the fuel tank, and addGas, to add gasoline to the fuel tank.Sample usage:Car myHybrid = new Car(50); // 50 miles per gallonmyHybrid.addGas(20); // Tank 20 gallonsmyHybrid.drive(100); // Drive 100 milesdouble gasLeft = myHybrid.getGasInTank(); // Get gas remaining in tankYou may assume that the drive method is never called with a distance that consumes morethan the available gas. Supply a CarTester class that tests all methods.arrow_forwardIN C++ Implement a class Car with the following properties. A car has a certain fuel efficiency (measured in miles/gallon or liters/km—pick one) and a certain amount of fuel in the gas tank. The efficiency is specified in the constructor, and the initial fuel level is 0. Provide another parameterized constructor which takes both efficiency and fuel as parameters. Also supply methods getGasInTank, returning the current amount of gasoline in the fuel tank. getEfficiency() return the efficiency of car. setGasInTank(double fuel), to add gasoline to the fuel tank. setEfficiency(double efficiency) Supply a method Drive () that simulates driving the car for a certain distance, reducing the amount of gasoline in the fuel tank according to its efficiency. Sample usage: Car myHybrid (50); // 50 miles per gallon myHybrid.addGas(20); // Tank 20 gallons myHybrid.Drive(100); // Drive 100 miles double gasLeft = myHybrid.getGasInTank(); // Get gas remaining in tank Supply a main method that tests…arrow_forward
- box1 and box2 are instances of the Box class. Attributes length, width, and height of both box1 and box2 are read from input. Then, two strings are read from input. In the Box class, define instance method print_measurements() with self and one string as parameters to output the string parameter in one line, and the following in the next line: The value of attribute length ' by ' The value of attribute width ' by ' The value of attribute heightarrow_forwardWrite a compareTo method that compares two Song objects based on the artist, and title within artist. For example, given the following Songobjects: "Glass Animals""Heat Waves" "Elton John, Dua Lipa""Cold Heart" "Adele""Easy on Me" "Doja Cat""Kiss Me More" "Adele""My Little Love" They will be put in the following order: "Adele""Easy on Me" "Adele""My Little Love" "Doja Cat""Kiss Me More" "Elton John, Dua Lipa""Cold Heart" "Glass Animals""Heat Waves" In which class does the compareTo method belong?arrow_forwardWrite a class called Circle that contains:a. Three private instance variables: radius (of the type double), color (of thetype String), and area (of type double).b. Two constructors - a default constructor with no argument (default value of radiusis 2.0, and color is Green) and a parameterized constructor, which initializes onlythe radius and the color variables.c. Getter and setter for the radius and color variables.d. Two public methods: calculateArea(), and getPerimeter, which return the areaand perimeter of a circle instance, respectively. Both methods have return.Then write a driver class that tests the Circle class. In the driver class, create two objectsof Circle class, one that tests the default constructor of the Circle class (here no user inputis required) and then get the color, radius, area, and perimeter of that object and displaythem. The second object should test the parameterized constructor (here you need to ask userto give you input to initialize the class variables).…arrow_forward
- Write a program that simulates the Magic 8 Ball game. The class should have a method that returns an answer at random. Test your class by outputting the answer several times.arrow_forwardWrite the equals method for Circle2 which returns true when the radius and the color are the same as the parameter’s radius and color. The TestCircle2, Circle2 and GeometricObject2 classes are given as follows. public class TestCircle2 { public static void main(String[] args) { Circle2 c1 = new Circle2(2.3, "red"); Circle2 c2 = new Circle2(5.6, "white"); Circle2 c3 = new Circle2(2.3, "red"); System.out.println("c1 equals c2: " + c1.equals(c2)); System.out.println("c1 equals c3: " + c1.equals(c3)); System.out.println("c2 equals c3: " + c2.equals(c3)); } } class Circle2 extends GeometricObject2 { private double radius; public Circle2() { } public Circle2(double radius) { this.radius = radius; } public Circle2(double radius, String color) { this.radius = radius; setColor(color); } /** * Return radius */ public double getRadius() {…arrow_forwardIn this exercise, you are going to build on your Circleclass from the previous exercise. You are going to add 2 method, areaDifference and perimeterDifference. Both methods take a doubleradius of a second circle and return the difference from the current circle. For example, if you create a Circle object with a radius of 4 and call areaDifference(3), you will return the diffence between the area of a circle with radius 4 and the area of a circle with a radius of 3. perimeterDifferencewould be the same. Make sure you create at least one Circle and test and print the results of your methods. in javaarrow_forward
- In this exercise, you are going to build on your Circleclass from the previous exercise. You are going to add 2 method, areaDifference and perimeterDifference. Both methods take a doubleradius of a second circle and return the difference from the current circle. For example, if you create a Circle object with a radius of 4 and call areaDifference(3), you will return the diffence between the area of a circle with radius 4 and the area of a circle with a radius of 3. perimeterDifferencewould be the same. Make sure you create at least one Circle and test and print the results of your methods. given: public class Circle{private double radius;public Circle(double theRadius){radius = theRadius;}// Add a method called area that returns the area of a circle// using Math.PIpublic double area(){return Math.PI*radius*radius;}// Add a method called perimeter that returns the perimeter of a// circle using Math.PIpublic double perimeter(){return Math.PI*2*radius;}}arrow_forwardWrite static methods: public static double cubeVolume(double h) : h^3 public static double cubeSurface(double h) : 6h^2 public static double cylinderVolume(double r, double h) : hπr^2 public static double cylinderSurface(double r, double h) : 2rπh+2πr^2 that compute the volume and surface area of a cube with height h, and a cylinder with circular base with radius r and height h. Place them into a class named “Geometry.java”. Then write a program with main class called “Lab7_yourID.java” that prompts the user for the values of r and h, calls the four methods, and prints the results. (Optional) Reconsider your previous solution by implementing classes Cube, and Cylinder separately instead of a single class “Geometry” (part A). Which approach is more object-oriented?arrow_forwardFor this problem you will write a method that computes the number of boxes in a pyramid of boxes based on the number of boxes in the base. The boxes in each layer of the pyramid are stacked directly on top of one another (i.e. not offset between two boxes below). For example, below are shown two pyramids, one with base 5 and one with base 6. [] [][] [][][] [][][][] [][][][][] [][][][][][] Implement and test the computePyramidBoxes() method in the PyramidBoxCount class. When testing the computePyramidBoxes() method you should be sure to have at least one test method for each base case and at least one test method for each recursive case in your program.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill EducationStarting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSONDigital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
- C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSONDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningProgrammable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education