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Engineering Computer Science Starting Out with Java: Early Objects (6th Edition)

Interface: Interface is a reference type in Java, which contains a collection of abstract methods. It is very similar to class, but it cannot be instantiated, rather it is implemented by other classes. An interface needs to the follow certain conditions such as: One cannot instantiate an interface. Interfaces do not contain any constructors...

Interface: Interface is a reference type in Java, which contains a collection of abstract methods. It is very similar to class, but it cannot be instantiated, rather it is implemented by other classes. An interface needs to the follow certain conditions such as: One cannot instantiate an interface. Interfaces do not contain any constructors...

Solution Summary: The author explains that an interface is a reference type in Java, which contains abstract methods. It cannot be instantiated, rather it is implemented by other classes.

Starting Out with Java: Early Objects (6th Edition)

Starting Out with Java: Early Objects (6th Edition)

6th Edition

ISBN: 9780134462011

Author: Tony Gaddis

Publisher: PEARSON

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Chapter 9.9, Problem 9.26CP

Explanation of Solution

Interface:

Interface is a reference type in Java, which contains a collection of abstract methods. It is very similar to class, but it cannot be instantiated, rather it is implemented by other classes.

An interface needs to the follow certain conditions such as:

One cannot instantiate an interface.

Interfaces do not contain any constructors...

Expert Solution & Answer

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Chapter 9.9, Problem 9.25CP

Chapter 9.9, Problem 9.27CP

Students have asked these similar questions

When an interface is implemented, why are all of its methods need to be implemented at the same time?

Does it make sense to implement each and every method of an interface while doing so?

If you're only implementing an interface, why do you need to implement all its methods?

Chapter 9 Solutions

Starting Out with Java: Early Objects (6th Edition)

Ch. 9.1 - Here is the first line of a class declaration....Ch. 9.1 - Look at the following class declarations and...Ch. 9.1 - Class B extends class A. (Class A is the...Ch. 9.2 - Prob. 9.4CP Ch. 9.2 - Look at the following classes: public class Ground...Ch. 9.3 - Under what circumstances would a subclass need to...Ch. 9.3 - How can a subclass method call an overridden...Ch. 9.3 - If a method in a subclass has the same signature...Ch. 9.3 - If a method in a subclass has the same name as a...Ch. 9.3 - Prob. 9.10CP

Ch. 9.4 - When a class member is declared as protected, what...Ch. 9.4 - What is the difference between private members and...Ch. 9.4 - Why should you avoid making class members...Ch. 9.4 - Prob. 9.14CP Ch. 9.4 - Why is it easy to give package access to a class...Ch. 9.6 - Look at the following class definition: public...Ch. 9.6 - When you create a class, it automatically has a...Ch. 9.7 - Recall the Rectangle and Cube classes discussed...Ch. 9.8 - Prob. 9.19CP Ch. 9.8 - If a subclass extends a superclass with an...Ch. 9.8 - What is the purpose of an abstract class?Ch. 9.8 - If a class is defined as abstract, what can you...Ch. 9.9 - Prob. 9.23CP Ch. 9.9 - Prob. 9.24CP Ch. 9.9 - Prob. 9.25CP Ch. 9.9 - Prob. 9.26CP Ch. 9.9 - Prob. 9.27CP Ch. 9.9 - Prob. 9.28CP Ch. 9 - In an inheritance relationship, this is the...Ch. 9 - In an inheritance relationship, this is the...Ch. 9 - This key word indicates that a class inherits from...Ch. 9 - A subclass does not have access to these...Ch. 9 - This key word refers to an objects superclass. a....Ch. 9 - In a subclass constructor, a call to the...Ch. 9 - The following is an explicit call to the...Ch. 9 - A method in a subclass that has the same signature...Ch. 9 - A method in a subclass having the same name as a...Ch. 9 - These superclass members are accessible to...Ch. 9 - Prob. 11MC Ch. 9 - With this type of binding, the Java Virtual...Ch. 9 - Prob. 13MC Ch. 9 - Prob. 14MC Ch. 9 - Prob. 15MC Ch. 9 - Abstract classes cannot ___________. a. be used as...Ch. 9 - You use the __________ operator to define an...Ch. 9 - Prob. 18MC Ch. 9 - Prob. 19MC Ch. 9 - You can use a lambda expression to instantiate an...Ch. 9 - True or False: Constructors are not inherited.Ch. 9 - True or False: in a subclass, a call to the...Ch. 9 - True or False: If a subclass constructor does not...Ch. 9 - True or False: An object of a superclass can...Ch. 9 - True or False: The superclass constructor always...Ch. 9 - True or False: When a method is declared with the...Ch. 9 - True or False: A superclass has a member with...Ch. 9 - True or False: A superclass reference variable can...Ch. 9 - True or False: A subclass reference variable can...Ch. 9 - True or False: When a class contains an abstract...Ch. 9 - True or False: A class may only implement one...Ch. 9 - True or False: By default all members of an...Ch. 9 - // Superclass public class Vehicle { (Member...Ch. 9 - // Superclass public class Vehicle { private...Ch. 9 - // Superclass public class Vehicle { private...Ch. 9 - // Superclass public class Vehicle { public...Ch. 9 - Write the first line of the definition for a...Ch. 9 - Look at the following code, which is the first...Ch. 9 - Write the declaration for class B. The classs...Ch. 9 - Write the statement that calls a superclass...Ch. 9 - A superclass has the following method: public void...Ch. 9 - A superclass has the following abstract method:...Ch. 9 - Prob. 7AW Ch. 9 - Prob. 8AW Ch. 9 - Look at the following interface: public interface...Ch. 9 - Prob. 1SA Ch. 9 - A program uses two classes: Animal and Dog. Which...Ch. 9 - What is the superclass and what is the subclass in...Ch. 9 - What is the difference between a protected class...Ch. 9 - Can a subclass ever directly access the private...Ch. 9 - Which constructor is called first, that of the...Ch. 9 - What is the difference between overriding a...Ch. 9 - Prob. 8SA Ch. 9 - Prob. 9SA Ch. 9 - Prob. 10SA Ch. 9 - What is an. abstract class?Ch. 9 - Prob. 12SA Ch. 9 - When you instantiate an anonymous inner class, the...Ch. 9 - Prob. 14SA Ch. 9 - Prob. 15SA Ch. 9 - Employee and ProductionWorker Classes Design a...Ch. 9 - ShiftSupervisor Class In a particular factory, a...Ch. 9 - TeamLeader Class In a particular factory, a team...Ch. 9 - Essay Class Design an Essay class that extends the...Ch. 9 - Course Grades In a course, a teacher gives the...Ch. 9 - Analyzable Interface Modify the CourseGrades class...Ch. 9 - Person and Customer Classes Design a class named...Ch. 9 - PreferredCustomer Class A retail store has a...Ch. 9 - BankAccount and SavingsAccount Classes Design an...Ch. 9 - Ship, CruiseShip, and CargoShip Classes Design a...

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