Data Structures and Algorithms in Java[1].pdf - Fulvio Frisone

for the comparison "a[i] > 0.5" will only be performed if the first two
comparisons succeed.
1.5.1 Declaring Arrays
One way to declare and initialize an array is as follows:
element_type[] array_name = {init_val_0,init_val_1,…,init_val_N−1};
The element_type can be any Java base type or class name, and array_name can be
any value Java identifier. The initial values must be of the same type as the array.
For example, consider the following declaration of an array that is initialized to
contain the first ten prime numbers:
int[] primes = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29};
In addition to creating an array and defining all its initial values when we declare it,
we can declare an array variable without initializing it. The form of this declaration
is as follows:
element_type[] array_name;
An array created in this way is initialized with all zeros if the array type is a number
type. Arrays of objects are initialized to all null references. Once we have
declared an array in this way, we can create the collection of cells for an array later
using the following syntax:
new element_type[length]
where length is a positive integer denoting the length of the array created. Typically
this expression appears in an assignment statement with an array name on the left
hand side of the assignment operator. So, for example, the following statement
defines an array variable named a, and later assigns it an array of 10 cells, each of
type double, which it then initializes:
double[] a;
//… various steps …
a = new double[10];
for (int k=0; k < a.length; k++) {
}
a[k] = 1.0;
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