Implement a class called Plane Constructorspublic Plane () – this is the default constructor; it assigns the following initialvalues to the instance variables:airline: Southwestmodel: 747year of the plane: 2021gallons per hour: 3600.0fills the tanksets the flying hours to zerosets the next inspection reminder.public Plane (String airline, String model, int y, doublegph) - this constructor sets the airline, model, year and gallons per hour to the providedinput parameters and sets the rest of the instance variables to the same values as thedefault constructor does.Accessor Methodspublic String getAirline ( ) - return the airline of the plane.public String getModel ( ) - return the model of the plane.public double getGph ( ) - return the gallons per hour.public int getYear () - return the year of the plane public double getHoursNextInspection ( ) - return hours of next inspectionpublic double checkFlyingHours ( ) - return the current amount of hoursflown.public double checkGas Gauge ( ) - return the amount of fuel in the tank.public String toString ) - return (don't print) a formatted String of theplane. Use the DecimalFormat class to format the hours flown and fuel in tank toinclude the commas and the two decimals as needed.Example:Delta 747 2021 Flight Hours: 10.50 JetFuel in Tank: 35,000.00Mutator Methodspublic void setAirline (String airline) – set the airline of the plane tothe value of the input parameterpublic void setModel (String model) – set the model of the plane to thevalue of the input parameterpublic void setGph (double value) – set the gallons per hour of the planeto the value of the input parameterpublic void setYear (int y) – set the year of the plane to the value of theinput parameter

Plane class: package pp; import java.text.DecimalFormat; public class Plane { String airline;…

public Plane () – this is the default constructor; it assigns the following initial values to the instance variables: | airline: Southwest model: 747 year of the plane: 2021 gallons per hour: 3600.0 fills the tank sets the flying hours to zero

public Plane () – this is the default constructor; it assigns the following initial values to the instance variables: | airline: Southwest model: 747 year of the plane: 2021 gallons per hour: 3600.0 fills the tank sets the flying hours to zero

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

Problem 1PE

See similar textbooks

Similar questions

Modify the student class presented in this chapter as follows. Each student object should also contain the scores for three tests. Provide a constructor that sets all instance values based on parameter values. Overload the constructor such that each test score is assumed to be initially zero. Provide a method called setTestScore that accepts two parameters: the test number (1 through 3) and the score. Also provide a method called getTestScore that accepts the test number and returns the appropriate score Provide a method called average that computes and returns the average test score for this student. Modify the toString method such that the test scores and average are included in the description of the student. Modify the driver class main method to exercise the new Student methods. (Java)
Aircraft Class:• Instance Variables:o aircraftNameo regNumbero manufacturero maxRangeo crewSizeo yearPutInServiceo maxServiceWeighto numPassengerso lastMaintenanceDateo lastMaintenanceMiles• Methods:o Two constructors, the default, and one that takes all instance variableso needsMaintenance()- this method will determine if an aircraft is in need ofmaintenance. It returns a Boolean value based on the following criteria. An aircraftrequires maintenance on the following schedule: Last maintenance date is 3 months or more Last maintenance mileage is 150,000 air miles or moreo shouldRetire()- this method should return a Boolean value that determines whether anaircraft is ready to be retired from service, based on the following criteria: More than 20 years past date put into service More than 2,000,000 air mileso toString()- See sample run for toString formato Only the getters and setters that are actually used. In java I need help with the needsMaintenance() and shouldRetire() methods
public Account (double initialBalance){balance = initialBalance;}public Account () {balance = 0;}public void deposit (double amount){balance += amount; // Balance = balance + amount}public void withdraw (double amount){balance -= amount; // balance = balance - amount}public void close (){balance = 0;}public String toString(){return "balance: " + balance;}} Modify the Account class by adding two instance variables containing the customer's name and the account number. Both will be String objects. Modify the primary constructor for the Account class so that it takes three parameters: the balance, the customer's name, and the account number. Add instance methods named getCustomerName and getAccountNumber that return the customer name and account number.
java. Check ‘n Shop is a grocery supermarket in South Africa that provides a loyalty program to customers on a monthly basis. Customers earn points based on the number of visits and the amount they spend, especially on healthy foods during the month. The private data fields for the Shopper object class are: See attached image The constructor must assign values of the parameters to the private data field variables. The static variable should be incremented by one in the constructor. The increaseLoyaltyPoints() method calculates the number of loyalty points based on the amount a customer spent at the supermarket. All customers receive 100 free points each month. Use the following criteria to calculate the additional points earned to be added to the 100 free points: For every four rands (R4) spent, one loyalty point is awarded. Make use of an appropriate Math class function to round up the loyalty points to a whole number. The updateHealthLevel() method receive the total amount…
This composition example contains classes Date, Employee and EmployeeTest .Class Date declares instance variables month, day and year to represent a date. The constructor receives three int parameters. It has method checkMonth to validate the month—if the value is out-of-range the method throws an error message. same goes for year and day. Provide getters, setters and toString method. Class Employee has instance variables firstName, lastName, birthDate and hireDate.Members firstName and lastName are references to String objects. Members birthDate and hireDate are references to Date objects. This demonstrates that a class can have as instance variables references to objects of other classes. The Employee constructor takes four parameters—first, last, dateOfBirth and dateOfHire. The objects referenced by the parameters are assigned to the Employee object’s instance variables. When class Employee’s toString method is called, it returns a String containing the employee’s name and the…
This composition example contains classes Date, Employee and EmployeeTest .Class Date declares instance variables month, day and year to represent a date. The constructor receives three int parameters. It has method checkMonth to validate the month—if the value is out-of-range the method throws an error message. same goes for year and day. Provide getters, setters and toString method. Class Employee has instance variables firstName, lastName, birthDate and hireDate.Members firstName and lastName are references to String objects. Members birthDate and hireDate are references to Date objects. This demonstrates that a class can have as instance variables references to objects of other classes. The Employee constructor takes four parameters—first, last, dateOfBirth and dateOfHire. The objects referenced by the parameters are assigned to the Employee object’s instance variables. When class Employee’s toString method is called, it returns a String containing the employee’s name and the…
Modify the Car class example and add the following: A default constructor that initializes strings to “N/A” and numbers to zero. An overloaded constructor that takes in initial values to set your fields (6 parameters). accel() method: a void method that takes a double variable as a parameter and increases the speed of the car by that amount. brake() method: a void method that sets the speed to zero. To test your class, you will need to instantiate at least two different Car objects in the main method in the CarDemo class. Each of your objects should use a different constructor. For the object that uses the default constructor, you will need to invoke the mutator methods to assign values to your fields. Invoke the displayFeatures() method for both objects and display the variables. Demonstrate the use of the accessor method getColor() by accessing the color of each car and printing it to the console. Use the method accel to increase the speed of the first car by 65 mph. Use…
Write a class Die representing a single die. Your class should include: An instance variable for the number of sides on the die. A constructor that allows you to specify the number of sides on the die. This method shouldcheck that there are at least 2 sides; if not, it should default to having 6 sides. A toString method that returns a description of the die, including its number of sides. A roll method that randomly returns one of the numbers on the die. Each number should have an equal probabilityof being returned. Assume that the numbers on the die range from 1 to the number of sides. A testDie method that takes one parameter for the number of times to roll the die. This method should roll the diethat number of times, keeping track of the results. Once all rolls are complete, the method should display statisticson how many times each number appeared, and the corresponding percentage. Example: Die myD4 = new Die(4); myD4.testDie(100000);might result in something like: Results from…
Java - Constructors Create a class named Book that has the following attributes: Publisher - String Year Published - Integer Price - Double Title - String Create a constructor for the class Book that has the parameters from the attributes of the class. After, create a method for the class that displays all attributes. Ask the user for inputs for the attributes and use the constructor to create the object. Lastly, print the values of the attributes. Inputs 1. Publisher 2. Year Published 3. Price 4. Book Title XYZ Publishing 2020 1000.00 How to Win? Sample Output Published: ABC Publishing Year Published: 2022 Price: 150.00 Book Title: Stooping too low Stooping too low is published by ABC Publishing on 2022. It sells at the price of Php150.00.
Create a class called Date that includes three instance variables-a month (type int), a day (type int) and a year (type int). Provide a constructor that initializes the three instance variables and assumes that the values provided are correct. Provide a set and a get method for each instance variable. Provide a method displayDate that displays the month, day and year separated by forward slashes (/). Add a main method to the class that demonstrates class Date's capabilities.
Write a class named Employee that has the following fields:• name. The name field references a String object that holds the employee’s name.• idNumber. The idNumber is an int variable that holds the employee’s ID number.• department. The department field references a String object that holds the name ofthe department where the employee works.• position. The position field references a String object that holds the employee’sjob title.The class should have the following constructors:• A constructor that accepts the following values as arguments and assigns them to theappropriate fields: employee’s name, employee’s ID number, department, andposition. • A constructor that accepts the following values as arguments and assigns them to theappropriate fields: employee’s name and ID number. The department and positionfields should be assigned an empty string (""). • A no-arg constructor that assigns empty strings ("") to the name, department, andposition fields, and 0 to the idNumber field.…
A class called Place. A Place will have two attributes: city state A Place will have these methods: default constructor overloaded constructor copy constructor setters and getters for all attributes get State initials – get the abbreviation for the state. You may use a utility or a case structure. (FYI, you don’t have to put all 50 states in, at least have what you have in the file. Pick a few and test. copy() equals() toString() 2. A FunPlace class. A FunPlace will have these attributes: name type (Example house, amusement park, corn maze, escape room) price Place - this will be of the Place class (Aggregation – a class is an attribute inside another class) A FunPlace will have these methods: default constructor overloaded constructor that allows name, type, price and a Place object to be passed in overloaded constructor that allows name, price Place copy constructor all getters all setters equals() copy() method toString() - this will include its Place.