Learn Java Basics
About Lesson

An array is a data structure that allows you to store a fixed number of values of the same data type under a single variable name. Each value in an array is called an element, and each element is accessed by its index number.

int[] myArray = new int[5];

Uses of Array

Arrays are used in Java and many other programming languages for several reasons:

  1. Grouping related data
  2. Efficient access
  3. Fixed-size
  4. Iteration
  5. Passing to functions

Advantages and Disadvantages of Array

Advantages of arrays:

  1. Efficient memory usage
  2. Fast element access
  3. Iteration
  4. Data organization
  5. Passing to functions

Disadvantages of arrays:

  1. Fixed-size
  2. Wasted memory
  3. Homogeneous data type
  4. Lack of flexibility
  5. Sorting

Types of Array

In Java, there are two types of arrays:

  1. Single-Dimensional Arrays

int[] numbers = new int[5];

  1. Multi-Dimensional Arrays

int[][] matrix = new int[3][4];

Types of Array Input

there are different ways to initialize an array with input values:

  1. Static initialization
  2. Dynamic initialization
  3. Reading from a file

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