Chapter 7: Single Dimension Array

Front 1

A single array variable

Back 1

can reference a large collection of data

Front 2

Array basics

Back 2

once an array is created, its size is fixed

an array reference variable is used to access the elements in an array using an index

Front 3

Declaring an array variable

Back 3

elementType[] arrayRefVar;

Front 4

New operator

Back 4

you can create an array by using the new operator and assign its reference to the variable

arrayRefVar = new elementType[arraySize];

this creates an array using new elementTYpe[arraySize] and it assigns the reference of the newly created array to the variable araryRefVar

Front 5

Array length

Back 5

the size of an array cannot be changed after the array is created

Front 6

indexed variable

Back 6

arrayRefVar[index];

Front 7

array initializer

Back 7

combines the declaration, creation, and initialization of an array in one statement using the following syntax

elementType[] arrayRefVar = {value0, value1, ..., valuek};

double[] myList = {1.9, 2.9, 3.4....etc};

Front 8

Processing arrays

Back 8

often use a for loop

all elements in an array are of the same type

they are evenly processed in the same fashion repeatedly using a loop

since the size of the array is known it is natural to use a for loop