Suppose we have a Farmer class defined as follows: public class Farmer{ String name; double weight; int x, y; public Farmer (String name, double weight, int x, int y) { this.name = name; this.weight = weight; this.x = x; this.y = y; Can the following code be executed? If yes, what is the result? If no, why not? public class Test { public void main(String[] args){ Farmer mark = new Farmer(); }

Suppose we have a Farmer class defined as follows: public class Farmer{ String name; double weight; int x, y; public Farmer (String name, double weight, int x, int y) { this.name = name; this.weight = weight; this.x = x; this.y = y; Can the following code be executed? If yes, what is the result? If no, why not? public class Test { public void main(String[] args){ Farmer mark = new Farmer(); }

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

Given the following class definition,public class Pen{ private String name; public Pen(String n) { name = n; } @Override public String toString() { return this.name + "-"; }}public class Brush extends Pen{ private int ink; public Brush(String n, int m) { super(n); ink = m; } @Override public String toString() { return super.toString() + this.ink + "-"; }}What is the output of the following program? Brush fluffy = new Brush("Fluffy", 5); System.out.print(fluffy);If there is no output, please specify "nothing" (no quotes) in the blank for the output. No hand written and fast answer with explanation
what is the problem with the following code. Give reason for your answer. public class MyClass\{ public static void main(String[] args) \{ int n[]={1,3,5,6} ; int b[]; b=n; \} \}
An arithmetic progression is a sequence of numbers such that the difference between the consecutive terms is constant. For instance, the sequence 5, 7, 9, 11, 13, 15 is an arithmetic progression with a common difference of 2.Given the class IntNumber:1 public class IntNumber2 {3 public final int value;45 public IntNumber(int number) {6 this.value = number;7 }8 }where value is an immutable field, that can be directly accessed (public), implement a class called ArithmeticProgressionthat implements the following methods:•1 public static IntNumber getArithmeticProgressionDifference(ArrayList<IntNumber> list)which returns the difference between terms of the arithmetic progression (as an object of type IntNumber) if thevalues of the IntNumber objects are an arithmetic progression. The method returns null in any other case.•1 public static void printIsArithmeticProgression(ArrayList<IntNumber> list)which prints on the console:The list is an arithmetic progression with difference =…
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…
*using java* Create a class AnimalCreate a class Cat, and a class Dog, and a class Bearded Dragon which extend Animal. Add to your Animal class: Member: name Methods: Public Animal(String name) //constructor public void makesSound()with the implementation printing out a generic animal sound. Next, override (add) the makesSound()method to your Cat and Dog class, with the implementation specific to each animal (i.e, cat says purr..). Do not override the makesSound() for your Dragon (bearded dragons don’t make sounds!)Note, you’ll also need a constructor in each of your subclasses which calls super(name) to initialize the common ‘name’ member of Animal. --- Next (in your test harness) create a List of different Animals ( a couple cats, a dog, a dragon... ) and add these Animals to your list. Iterate through your list & call makeSound on each. ( you should observe the implementation of the makeSound() method called will be: cat -> from Cat class, dog-> from Dog class,…
use Java. Given the following class. public class FamilyMember { public String drink( ) {return “cup”;} public String eat( ) {return “fork”;} } Write a Baby class that is derived from the FamilyMember class. The Baby class has an instance variable for the age, a default constructor, and a constructor that accepts an integer. Include any other necessary methods. If a baby is older than 3 years, print that “it eats with its fork”; otherwise, “it eats with its hands”.
The following is in Java: public class MyClass { private int x; private double y; public static void setValues(int a, double b) { x = a; y = b; } } 1) What is the problem? 2) In a few sentences how can the issue be fixed?
Consider the following class definitions: public class Thing {public void string_method(String word) {word = word.substring(word.length() - 1);System.out.print(word);} }public class Thing2 extends Thing {public void string_method(String word) {super.string_method(word);System.out.print(word.substring(0,1));}} The following code segment appears in a class other than Thing or Thing2 Thing2 thing = new Thing2();thing.string_method("Tacky"); What is printed as a result of running the code segment? Group of answer choices yT yy Index Out of Bounds Error TT TackyTacky
An arithmetic progression is a sequence of numbers such that the difference between the consecutive terms is constant. For instance, the sequence 5, 7, 9, 11, 13, 15 is an arithmetic progression with a common difference of 2. Given the class IntNumber: 1. public class IntNumber 2. { 3. public final int value; 4. 5. public IntNumber(int number) { 6. this.value = number; 7. } 8. } where value is an immutable field, that can be directly accessed (public), implement a class called ArithmeticProgression that implements the following methods: •1 public static IntNumber getArithmeticProgressionDifference(ArrayList< IntNumber> list) which returns the difference between terms of the arithmetic progression (as an object of type IntNumber) if the values of the IntNumber objects are an arithmetic progression. The method returns null in any other case. • public static void printIsArithmeticProgression(ArrayList<IntNumber> list ) which prints on the console: The list is an arithmetic…
Consider a class that keeps track of the sales of an item. An object of thisclass will have the attributes• Number sold• Total sales• Total discounts• Cost per item• Bulk quantity• Bulk discount percentageand the following methods:• registerSale(n) records the sale of n items. If n is larger than the bulkquantity, the cost per item will be reduced by the bulk discount.• displaySales displays the number sold, the total sales, and totaldiscount.a. Implement the class in Java.b. Write some Java statements that test the class.
Consider the following code in Java 8:public interface Runnable{void run() ;}public final class Caller {public static void call (String before, String after, Runnable r) (System.out.println(before);r. run() ;System.out.println(after);} }public class MyClass{public static void main(String args[]) (Caller.call("BEFORE", "AFTER",); } }Complete the blark line with some code so that the program prints the folowing to the output: BEFOREHi there!AFTER
Java program Make a class Employee with a name and salary. Make a class Manager inherit from Employee. Add an instance variable, named department, of type String. Supply a method toString that prints the manager’s name, department, and salary. Make a class Executive inherit from Manager. Supply appropriate toString methods for all classes. Supply a test program that tests these classes and methods.