ARRAYS - Java Programming: From Problem Analysis to Program Design - page 554

where intExp is any expression that evaluates to a positive integer. Also, the value of
intExp specifies the number of elements in the array.
You can combine the statements in Lines 1 and 2 into one statement as follows:

dataType[] arrayName = new dataType[intExp]; //Line 3

We typically use statements similar to the one in Line 3 to create arrays to manipulate
data.

When an array is instantiated, Java automatically initializes its elements to their default
values. For example, the elements of numeric arrays are initialized to 0 , the elements
of char arrays are initialized to the null character, which is '\u0000' , the elements of
boolean arrays are initialized to false .

EXAMPLE 9-1

The statement:
int [] num = new int [5];

declares and creates the array num consisting of 5 elements. Each element is of type int .
The elements are accessed as num[0] , num[1] , num[2] , num[3] , and num[4] . Figure 9-1
illustrates the array num .

num

num[0]
num[1]
num[2]
num[3]
num[4]

0
0
0
0
0

FIGURE 9-1 Array num