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Questions and Answers

What is the purpose of a constructor?

initialize the PIVs

When looking at a class, you can easily distinguish a constructor from the class methods because it and .

has same name as the class and no return type

A default constructor has no in its .

parameters in its parameter list

What does it mean when a class has 2 or more constructors?

overloaded Signup and view all the answers

In writing a class, ___ are created to code the behaviors of the object.

methods Signup and view all the answers

What are the two types of methods in a class?

modifier/mutator and accessor Signup and view all the answers

methods do not change the state of the object. They do not contain any code that will change the _.

accessor, PIVs Signup and view all the answers

methods can change the state of the object. They will have _ or calls to other methods that will change the _.

modifier/mutator, assignment statements, PIVs Signup and view all the answers

What is the return type for a method that will not return a value?

void Signup and view all the answers

Return type: _ or a _ type, meaning that when the method finishes executing, it will return a value of the _ indicated by the .

primitive or object, data type, return type Signup and view all the answers

What is a class in programming?

a blueprint, or set of instructions for building objects Signup and view all the answers

What is an object in relation to a class?

an instance of a class Signup and view all the answers

An object has , , and ____.

state, behaviors, and identity Signup and view all the answers

The _ of an object is created in class code by declaring __.

state, PIVs Signup and view all the answers

The of an object is created in a class by writing __.

behaviors, methods Signup and view all the answers

The of an object is created in client code when __.

identity, an object is instantiated by calling a constructor with 'new' Signup and view all the answers

Putting state & behaviors ( and ) in a class is called __.

PIVs and methods, encapsulation Signup and view all the answers

Making method headings _ and method bodies and instance variables _ in a class is called ___.

public, hidden, private, information hiding Signup and view all the answers

__ are 2+ methods with the same name and different parameters.

overloaded methods Signup and view all the answers

What is the access level of the method 'public void hop(int times)'?

access Signup and view all the answers

What is the return type of the method 'public void hop(int times)'?

return type Signup and view all the answers

What is the name of the method 'public void hop(int times)'?

name Signup and view all the answers

What is included in the parameter list of 'public void hop(int times)'?

parameter list Signup and view all the answers

What comprises the method body of 'public void hop(int times)'?

method body Signup and view all the answers

What is the purpose of the toString method?

to return a String with info about the object Signup and view all the answers

What is the purpose of an accessor method?

to provide info about the object Signup and view all the answers

What is the purpose of a modifier method?

to change the state of the object Signup and view all the answers

Method/Constructor parameters are found in a __.

method heading Signup and view all the answers

A method/Constructor parameter is a variable that's being declared in the _.

local, header Signup and view all the answers

A method/Constructor parameter can only be used while the __.

method or constructor is executing Signup and view all the answers

What is the purpose of a method/Constructor parameter?

to bring info from the client to the object Signup and view all the answers

Study Notes

Constructors

The primary purpose of a constructor is to initialize private instance variables (PIVs).
Constructors can be identified by sharing the same name as the class and lacking a return type.
A default constructor is defined as having no parameters in its parameter list.
Multiple constructors in a class indicate that they are overloaded.

Methods

Methods are essential in a class to code the behaviors of the objects.
There are two main types of methods: modifier (mutator) and accessor.
Accessor methods do not alter the state of an object and do not modify its PIVs.
Modifier methods can change the object's state and include assignment statements or call other methods.

Return Types

A method with a return type of 'void' signifies that it does not return any value.
If a method has a return type that is either primitive or an object type, it will return a value corresponding to the data type specified as the return type.

Class and Object Definitions

A class functions as a blueprint or set of instructions for creating objects.
An object is essentially an instance of a class.
An object comprises state, behaviors, and an identity, collectively defining its characteristics.
The state's creation occurs in the class code by declaring PIVs, while the behaviors are defined by writing methods.
An object's identity is assigned in client code when it’s instantiated via a constructor using the "new" keyword.

Encapsulation and Information Hiding

Encapsulation involves combining state (PIVs) and behaviors (methods) within a class.
Information hiding is achieved by making method headings public, method bodies hidden, and instance variables private.

Overloaded Methods

Overloaded methods are defined as two or more methods sharing the same name but differing in their parameter lists.

Method Components

The structure of a method includes various components such as access modifier, return type, method name, parameter list, and method body.
The purpose of the toString method is to return a string containing information about the object.
Accessor methods aim to provide information regarding the object, whereas modifier methods focus on changing the object's state.

Parameters

Method and constructor parameters are declared in the method heading.
A parameter acts as a local variable defined in the header and can only be utilized while the respective method or constructor is in execution.
The main purpose of a method or constructor parameter is to pass information from the client to the object.

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Questions and Answers

What is the purpose of a constructor?

When looking at a class, you can easily distinguish a constructor from the class methods because it ____ and ____.

A default constructor has no ____ in its ____.

What does it mean when a class has 2 or more constructors?

In writing a class, ___ are created to code the behaviors of the object.

What are the two types of methods in a class?

__ methods do not change the state of the object. They do not contain any code that will change the ___.

__ methods can change the state of the object. They will have _____ or calls to other methods that will change the ___.

What is the return type for a method that will not return a value?

Return type: _____ or a _______ type, meaning that when the method finishes executing, it will return a value of the _____ indicated by the __.

What is a class in programming?

What is an object in relation to a class?

An object has __, __, and ____.

The ___ of an object is created in class code by declaring ____.

The __ of an object is created in a class by writing ____.

The __ of an object is created in client code when ____.

Putting state & behaviors (____ and ______) in a class is called ____.

Making method headings ___ and method bodies ____ and instance variables ___ in a class is called ___.

__ are 2+ methods with the same name and different parameters.

What is the access level of the method 'public void hop(int times)'?

What is the return type of the method 'public void hop(int times)'?

What is the name of the method 'public void hop(int times)'?

What is included in the parameter list of 'public void hop(int times)'?

What comprises the method body of 'public void hop(int times)'?

What is the purpose of the toString method?

What is the purpose of an accessor method?

What is the purpose of a modifier method?

Method/Constructor parameters are found in a __.

A method/Constructor parameter is a __ variable that's being declared in the ___.

A method/Constructor parameter can only be used while the __.

What is the purpose of a method/Constructor parameter?

Study Notes

Constructors

Methods

Return Types

Class and Object Definitions

Encapsulation and Information Hiding

Overloaded Methods

Method Components

Parameters

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When looking at a class, you can easily distinguish a constructor from the class methods because it and .

A default constructor has no in its .

methods do not change the state of the object. They do not contain any code that will change the _.

methods can change the state of the object. They will have _ or calls to other methods that will change the _.

Return type: _ or a _ type, meaning that when the method finishes executing, it will return a value of the _ indicated by the .

An object has , , and ____.

The _ of an object is created in class code by declaring __.

The of an object is created in a class by writing __.

The of an object is created in client code when __.

Putting state & behaviors ( and ) in a class is called __.

Making method headings _ and method bodies and instance variables _ in a class is called ___.

A method/Constructor parameter is a variable that's being declared in the _.