Java Arrays Tutorial

Arrays in Java are a fundamental data structure that allows you to store multiple values of the same type in a single variable. Arrays are indexed, meaning each element of an array is associated with a unique index that allows for direct access. Let’s delve into arrays with examples and detailed comments.

Declaring Arrays

You can declare an array in Java by specifying the data type of its elements, followed by square brackets.


Initializing Arrays

Arrays can be initialized when they are declared or after declaration.


Accessing Array Elements

Array elements are accessed by their index. Note that array indices start at 0.


Modifying Array Elements

You can modify an element of an array by accessing it by its index and assigning a new value.


Iterating Over Arrays

You can iterate over array elements using a for loop or an enhanced for loop (for-each loop).

Using a for loop:

Using a for-each loop:

Multidimensional Arrays

Java supports multidimensional arrays, which are arrays of arrays.


Array Length

You can find the length of an array using the length property.


Arrays in Java are a versatile data structure used to store collections of data. They play a crucial role in various programming scenarios, from simple data storage to complex algorithms. Understanding how to declare, initialize, access, and iterate over arrays is fundamental for any Java programmer

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