javaarray.pdf

Java Array

Agenda

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What is an array

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Declaration of an array

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Instantiation of an array

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Accessing array element

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Array length

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Multi-dimensional array

What is an Array?

Introduction to Arrays

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Suppose we have here three variables of type int with

different identifiers for each variable.

int number1;

int number2;

int number3;

number1 = 1;

number2 = 2;

number3 = 3;

As you can see, it seems like a tedious task in order to just

initialize and use the variables especially if they are used for

the same purpose.

Introduction to Arrays

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In Java and other programming languages, there is one

capability wherein we can use one variable to store a list of

data and manipulate them more efficiently. This type of

variable is called an array.

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An array stores multiple data items of the same data type, in

a contiguous block of memory, divided into a number of

slots.