In a Java class that follows the common object-oriented programming conventions for classes that will be made available for others to use and maintained over time, it is suggested that all data fields be defined:

In a Java class that follows the common object-oriented programming conventions for classes that will be made available for others to use and maintained over time, it is suggested that all data fields be defined:

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

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import java.util.*; class Money { private int dollar; private int cent; final static int MIN_CENT_VALUE = 0; final static int MAX_CENT_VALUE = 99; public Money() { this.dollar = 0; this.cent = 0; } public Money(int dollar, int cent) { this.dollar = dollar; if (cent > MIN_CENT_VALUE && cent <= MAX_CENT_VALUE) { this.cent = cent; } else { cent = 0; } } public int getDollar() { return this.dollar; } public void setDollar(int dol) { this.dollar = dol; } public int getCent() { return this.cent; } public void setCent(int c) { if (c >= MIN_CENT_VALUE && c <= MAX_CENT_VALUE) { this.cent = c; } } public Money add(Money otherMoney) { Money m = new Money(); m.dollar = this.dollar + otherMoney.dollar; m.cent = this.cent + otherMoney.cent; if (m.cent >= 100) {…
QUESTION 18 Java uses a hybrid typing system: One system for primitives but everything else is an object. True False
There are notable differences between static and instance methods.
A Java-supplied default (a.k.a. a no-argument, or no-args) constructor (i.e., a constructor that takes no parameters and essentially does nothing) is automatically generated by Java for a class, provided that no other constructor is defined for the class. * True False
why might we write public get and set methods for private properties? hint: you may want to do a quick internet search for "java getters and setters pros and cons." 1. these public methods give us a way to read and write the values of these properties in a controlled way 2. they make a program run more efficiently 3. if we didn’t, there would be no way to read or write the values of the properties 4. object-oriented languages require us to do this
(b) Find all the errors in the C++ code below: class Point { private: int x, y: public: Point(int x = 0, int y = 0); int getX() const; // Getters void setX(int x); // Setters void setY(int y); }; Point:: Point(int x, int y) : x(x), y(y) { } // Using initializer list // Getters int Point::getX() const { return x; } int Point::getY) const { return y; } // Setters void Point::setX(int x) { this->x = x; } void Point::setY(int y) { this->y = y; } // Public Functions void print() const { cout « "(" « x« "," « y « ")" « endl; // Member function overloading '+' operator void Point::operator+(Point rhs) const { return Point(x + rhs.x, y + rhs.y); int main() { Point p1(1, 2), p2(4, 5); // Use overloaded operator Point p3 = p1 + p2; p1.print(); // (1,2) p2.print(); / (4,5) p3.print(); / i5,7) Point p5 = p1 + p2 + p3 + p4; p5.print (); // (15,21) cout<
Consider the following class declarations in C++:class C {protected: int x;public: void f(){...};};class C1: public C {protected: int x1;public: void h(C *obj){...};};class C2: public C1 {public: int x2;};class C3: public C {public: f(){...};};i. Draw the class hierarchyii. Assume that main contains the following declaration:C1 obj1;For each of the following expressions, say whether it is allowed in the code of main or not (they can be forbidden either because they violate the classdefinition or the protection mechanism)obj1.x , obj1.f() , obj1.x1 , obj1.x2iii. Assume that the body ofC1::h contains the following declarationsC2 *obj2;C3 *obj3;For each of the following expressions, say whether it is allowed in the bodyofC1::hor notobj->x , obj2->x , obj3->xiv. Assume that the body ofC1::h contains the following statementobj->f();Assume that we call C1::h with a parameter (pointing to an object) of classAnd what would be the method executed if f were declared virtual in C?
Java
Can we override static methods of a class?