Java Programming Itis 1213 Gaddis Test 3 Partial

Front 1

In an inheritance relationship, what is the general class called?

Back 1

superclass

Front 2

In an inheritance relationship, what is the specialized class called?

Back 2

subclass

Front 3

This key word indicates that a class inherits ftom another class.

Back 3

extends

Front 4

A subclass does not have access to these superclass members.

Back 4

private

Front 5

This key word refers to an object's superclass.

Back 5

super

Front 6

In a subclass constructor, a call to the superclass constructor must appear where?

Back 6

first statement

Front 7

What is method overriding?

Back 7

method in subclass has the same signature as method in superclass.

Front 8

Write the first line of the definition for a Poodle class. The class should inherit from the Dog class.

Back 8

public class Poodle extends Dog

Front 9

Look at the following code which is the first line of a class definition:
public class Bear extends Animal
In what order will the class constructors execute?

Back 9

Animal, then Bear

Front 10

Write the statement that calls a superclass constructor and passes the arguments x, y, and z.

Back 10

super(x, y, z);

Front 11

A superclass has the following method:
public void setNumber (int n)
{
number = n;
}

Write a statement that can appear in a subclass that calls this method, passing 25 as an argument.

Back 11

setNumber(25);

Front 12

Write the first line of the definition for a Stereo class. The class should inherit from the SoundSystem class and should implement the CDPlayable interface.

Back 12

public class Stereo extends SoundSystem implements CDPlayable

Front 13

______ variables are designed to hold only one value at a time.

Back 13

Primitive

Front 14

Arrays allow us to create a collection of like values that are _______.

Back 14

indexed

Front 15

An array can store any ________ but only one type of data at a time

Back 15

type of data

Front 16

An array is a list of _______.

Back 16

data elements

Front 17

An array is an object so it needs an ________.

Back 17

object reference

int[] numbers;

Front 18

The array size must be a ____ number.

Back 18

non-negative

Front 19

An array is accessed by:

Back 19

the reference name
a subscript that identifies which element in the array to access.

Front 20

The length of an array can be obtained via its ____ constant

Back 20

length

ex: int size = temperatures.length;

Front 21

The return type of the method must be declared as an array of the right type.

Back 21

public static double[] getArray()
{
double[] array = { 1.2, 2.3, 4.5, 6.7, 8.9 };
return array;
}

Front 22

VERY IMPORTANT!!!!!!!!!!

The relationship between a superclass and an inherited class is called an _______.

Back 22

“is a” relationship

Front 23

We can _______ the capabilities of a class

Back 23

extend

Front 24

Inheritance involves a _______ and a subclass

Back 24

superclass

Front 25

The subclass is based on, or _______ from, the superclass.

Back 25

extended

Front 26

The relationship of classes can be thought of as parent ______ and _________.

Back 26

classes and child classes

Front 27

The subclass inherits fields and methods from the superclass without any of them being _______.

Back 27

rewritten

Front 28

The Java keyword, _______, is used on the class header to define the subclass.

Back 28

extends

ex: public class FinalExam extends GradedActivity

Front 29

Members of the superclass that are marked _____

-are not inherited by the subclass

Back 29

private

Front 30

Members of the superclass that are marked _______.

-are inherited by the subclass

Back 30

public

Front 31

Constructors are ________.

Back 31

not inherited

Front 32

When a subclass is instantiated, the _______ _______ constructor is executed first.

Back 32

superclass default

Front 33

The _______ keyword refers to an object’s superclass.

Back 33

super

Front 34

The subclass method overrides the superclass method.
This is known as _________.

Back 34

method overriding

Front 35

The class StringTokenizer is in the _____ package.

Back 35

java.util

Front 36

the constructor method:

Back 36

public StringTokenizer (String theString)

StringTokenizer tokens = new StringTokenizer(line)

Front 37

Constructor for a tokenizer that will use the characters in the string delimiters as separators when finding tokens in theString:

Back 37

StringTokenizer tokens = new StringTokenizer(line, “,-”)

Front 38

Returns true if there are more tokens in theString; returns false otherwise.

Back 38

public boolean hasMoreTokens()

Front 39

Returns the next token from theString

Back 39

public String nextToken()

Front 40

Returns the number of tokens remaining to be returned by nextToken

Back 40

public int countTokens()

Front 41

In each of the following statements us in the StringTokenizer class, how many tokens would be returned?
String line = “Ed’s ID# is 234-61-9876!”;
a. StringToken tokens = new StringTokenizer(line, “-”)
b. StringToken tokens = new StringTokenizer(line, “#-”)
c. StringToken tokens = new StringTokenizer(line, “#’-”)

Back 41

a. 3

b. 4

c. 5