Arrays in Java

An array is a container object that holds a fixed number of values of a single type. The length of an array is established when the array is created. After creation, its length is fixed. You've seen an example of arrays already, in the mainmethod of the "Hello World!" application. This section discusses arrays in greater detail.

An array of ten elements

http://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html

class ArrayDemo {

public static void main (String[ ] args){

//declares an array of integers

Int [ ] anArray;

//allocates memory for 3 integers

anArray = new int[10];

//initialize first element

anArray[0] = 100;

//etc.

anArray[1] = 200;

anArray[2] = 300;

System.out.println(“Element at index 0: ” + anArray[0]);

System.out.println(“Element at index 1: ” + anArray[1]);

System.out.println(“Element at index 2: ” + anArray[2]);              

}   

}

The output from this program is:

Element at index 0: 100

Element at index 1: 200

Element at index 2: 300