Java Exam 1 Ch 4

Front 1

Block

Back 1

Code between a pair if { }

Front 2

Outside block / outer block

Back 2

Contains another block

Front 3

Inside block / inner block

Back 3

Contained within another block

Front 4

Nested

Back 4

Describes the state of an inner block

Front 5

Comes into scope

Back 5

Describes what happens to a variable when it becomes usable

Front 6

Goes out of scope

Back 6

Describes what happens to a variable when it ceases to exist at the end of the block in which is declared

Front 7

Redeclare a variable

Back 7

Is to attempt to declare it twice (an illegal action)

Front 8

Overrides

Back 8

Another with the same name when it takes precedence over the other bearable

Front 9

Shadowing

Back 9

Action that occurs when a local variable hides a variable with the same name that is further away in scope

Front 10

Closer in scope

Back 10

Describes the status of a local variable over others that it shadows

Front 11

Overloading

Back 11

Involves using one term to indicate diverse meanings, or writing multiple methods in the same name but with different arguments

Front 12

Ambiguous

Back 12

Situation is one in which a compiler cannot determine which method to use

Front 13

Reference

Back 13

Is an objects memory address

Front 14

"this" reference

Back 14

Reference to an object that is passed to any objects non-static class method

Front 15

Class methods

Back 15

Static methods that do not have a "this" reference, because they have no object associated with them

Front 16

Class variables

Back 16

Static variables that are shared by every instantiation of a class

Front 17

NaN

Back 17

acronym for Not a Number

Front 18

Package

Back 18

Is a library of classes

Front 19

Library of classes

Back 19

A folder that provides a convenient grouping for classes

Front 20

java.lang

Back 20

Package is implicitly imported into every Java program

Front 21

Fundamental classes

Back 21

Basic classes contained in the java.lang package that are automatically imported into every program you write

Front 22

Optional classes

Back 22

Reside and packages that must be explicitly imported into your programs

Front 23

Wildcard symbol

Back 23

* ; the symbol used to indicate that it can be replaced by any set of characters. And it Java import statement you use a wildcard symbol to represent all the classes in a package

Front 24

Composition

Back 24

Describes the relationship between classes when an object of one class is a data field within another class

Front 25

has-a relationship

Back 25

Relationship based on composition

Front 26

Nested classes

Back 26

Classes are contained in other classes

Front 27

Top-level class

Back 27

Containing class in nested classes

Front 28

static member class

Back 28

Type of nested class that has access to all static methods of its top-level class

Front 29

Nonstatic member classes / inner classes

Back 29

Nested classes that require an instance

Front 30

Local classes

Back 30

Type of nested class that are local to a block of code

Front 31

Anonymous classes

Back 31

Nested, local classes that have no identifier