Starting Out with Java: Early Objects (6th Edition)
6th Edition
ISBN: 9780134462011
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 3SA
Consider the following class declaration:
public class Thing
{
private int x;
private int y;
private static int z = 0;
public Thing ()
{
x = z;
y = z;
}
public static void putThing(int a)
{
z = a;
}
}
Assume a program containing the class declaration defines three Thing objects with the following statements:
Thing one = new Thing ();
Thing two = new Thing ();
Thing three = new Thing ();
- a. How many separate instances of the x member exist?
- b. How many separate instances of the y member exist?
- c. How many separate instances of the z member exist?
- d. What value will be stored in the x and y members of each object?
- e. Write a statement that will call the putThing method.
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Consider the following class declaration:
class Thing
{private: int x; int y;static int z; public:Thing(){ x = y = z; }static void putThing(int a) { z = a; }};int Thing:: z = 0:Assume a program containing the class declaration defines three Thing objects with the following statement:Thing one, two, three;A) How many separate instances of the x member exist?B) How many separate instances of the y member exist?C) How many separate instances of the z member exist?D) What value will be stored in the x and y members of each object?E) Write a statement that will call the putThing member function before the Thing objects are defined.
8. OOPS Theory #6
public class Car {
public void horn() {
System.out.println("Horn horn");
}
}
public class Ferrari extends Car {
public void horn() {
System.out.println("Ferarriiiiii");
}
}
public static void main(String[] args) {
Ferrari ferrari = new Car();
ferrari.horn();
}
Pick ONE option
Horn horn
Ferarriiii
Cannot compile
Runtime exception
Clear Selection
9. OOPS Theory #7
In Java, we can achieve the abstraction by creating the blueprint of an object and only have abstract methods. What do we call this?
Pick ONE option
Interface
Encapsulation
Instance
Protected
Clear Selection
2. Complete the application below.
public class CarApp {
public static void main() {
string color = blue;
string model = C2021;i
int speed
80;
%3D
// declare necessary object matching to the constructor definition
// display the color and model on the screen
// call the calspeed) method and display the new speed after calculation.
}
}
Chapter 6 Solutions
Starting Out with Java: Early Objects (6th Edition)
Ch. 6.1 - Prob. 6.1CPCh. 6.1 - Prob. 6.2CPCh. 6.1 - Describe the limitation of static methods.Ch. 6.3 - Prob. 6.4CPCh. 6.3 - What is a methods signature?Ch. 6.3 - Prob. 6.6CPCh. 6.3 - How many default constructors may a class have?Ch. 6.4 - Prob. 6.8CPCh. 6.4 - Prob. 6.9CPCh. 6.4 - Prob. 6.10CP
Ch. 6.5 - Recall the Rectangle class shown earlier in this...Ch. 6.9 - Consider the following statement: A car has an...Ch. 6.9 - Why is it not safe to return a reference to an...Ch. 6.9 - A class has a reference variable as an instance...Ch. 6.10 - Prob. 6.15CPCh. 6.12 - Look at the following statement, which declares an...Ch. 6.12 - Assume that the following enumerated data type has...Ch. 6.12 - Prob. 6.18CPCh. 6 - This type of method cannot access any non-static...Ch. 6 - Prob. 2MCCh. 6 - Prob. 3MCCh. 6 - Prob. 4MCCh. 6 - If you write this method for a class, Java will...Ch. 6 - Making an instance of one class a field in another...Ch. 6 - This is the name of a reference variable that is...Ch. 6 - This enum method returns the position of an enum...Ch. 6 - Assuming the following declaration exists: enum...Ch. 6 - You cannot use the fully qualified name of an enum...Ch. 6 - The Java Virtual Machine periodically performs...Ch. 6 - If a class has this method, it is called...Ch. 6 - CRC stands for a. Class, Return value, Composition...Ch. 6 - Prob. 11MCCh. 6 - True or False: A static member method may refer to...Ch. 6 - True or False: All static member variables are...Ch. 6 - Prob. 18TFCh. 6 - Prob. 19TFCh. 6 - Prob. 21TFCh. 6 - True or False: Enumerated data types are actually...Ch. 6 - True or False: enum constants have a toString...Ch. 6 - True or False: A class may not have more than one...Ch. 6 - True or False: A private class that is defined...Ch. 6 - public class MyClass { private int x; private...Ch. 6 - public class TwoValues { private int x, y; public...Ch. 6 - public class MyMath { public static int square(int...Ch. 6 - Assume the following declaration exists : enum...Ch. 6 - l. Consider the following class declaration:...Ch. 6 - A pet store sells dogs, cats, birds, and hamsters....Ch. 6 - Prob. 1SACh. 6 - Prob. 2SACh. 6 - Consider the following class declaration: public...Ch. 6 - Prob. 4SACh. 6 - How does method overloading improve the usefulness...Ch. 6 - Prob. 6SACh. 6 - Even if you do not write an equals method for a...Ch. 6 - A has a relationship can exist between classes....Ch. 6 - Prob. 9SACh. 6 - Is it advisable or not advisable to write a method...Ch. 6 - Prob. 11SACh. 6 - Look at the following declaration: enum Color {...Ch. 6 - Assuming the following enum declaration exists:...Ch. 6 - Under what circumstances does an object become a...Ch. 6 - Area Class Write a class that has three overloaded...Ch. 6 - InventoryItem Class Copy Constructor Add a copy...Ch. 6 - Carpet Calculator The Westfield Carpet Company has...Ch. 6 - LandTract Class Make a LandTract class that has...Ch. 6 - Month Class Write a class named Month. The class...Ch. 6 - Employee Class Modification In Programming...Ch. 6 - RetailItem Class Modification Modify this chapters...Ch. 6 - Sales Receipt File Modify the program you wrote in...Ch. 6 - Parking Ticket Simulator For this assignment you...Ch. 6 - Geometry Calculator Design a Geometry class with...Ch. 6 - Car Instrument Simulator For this assignment, you...Ch. 6 - First to One Game This game is meant for two or...Ch. 6 - Heads or TaiLs Game This game is meant for two or...
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