Java Arrays Methods — Free Java Tutorial

TL;DR: Learn Java Arrays Methods in Java with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

Java Arrays Methods in Java

An array in Java is a fixed-size container that holds multiple values of the same type. Arrays are zero-indexed: the first element is at index 0.

Java arrays are objects, so they have a `.length` property (not a method). Arrays cannot be resized after creation — for dynamic sizing, use ArrayList.

Methods (functions) allow you to encapsulate reusable logic. Java methods have: an access modifier, return type, name, parameters, and body.

A method must declare its return type. If it returns nothing, the return type is `void`. Use `return` to send a value back to the caller.

Java supports method overloading: multiple methods with the same name but different parameter lists. The compiler picks the right one based on the arguments provided.

The `Arrays` utility class (from `java.util.Arrays`) provides helpful methods: `Arrays.sort()`, `Arrays.toString()`, `Arrays.fill()`, `Arrays.copyOf()`.

// Declare and initialize array
int[] nums = {1, 2, 3, 4, 5};
String[] names = new String[3];  // empty array of size 3

// Access & modify
int first = nums[0];
nums[2] = 99;

// Method declaration
returnType methodName(paramType param1, paramType param2) {
    // body
    return value;  // omit if 

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