Java Array

Arrays in Java, conceptually, are no different than in other programming languages.

• Arrays are contiguous memory locations storing only one type of item in a sequence.
• Arrays provide index-based access i.e. the first element of the array is stored at the 0th index, 2nd element is stored on 1st index and so on.
• Note that, in Java, arrays are also objects that inherit the Object class, and implement the Serializable as well as Cloneable interfaces.
• We can store all kinds of primitive values or objects in an array.
• Java supports single dimentional or multi-dimentional arrays, both. 

The java.util.Arrays class provides many useful static methods to work with arrays and perform common operations on them.

1. Array Basics

• Intro to Java Arrays
• Initialize an Array
• Reverse an Array
• Comparing Two Arrays
• ArrayStoreException
• Printing an Array
• Printing 2D Array

2. Array Operations

• Concatenate Two Arrays in Java
• Splitting an Array
• Joining Array Items with Seperator
• Resizing an Array
• Removing Items from Array
• Remove Duplicates from Array
• Union of Two Arrays
• Intersection of Two Arrays

3. Searching and Sorting

• How to Check is Array Contains an Item
• Find Top N items in Array
• Find Sum and Average of Array
• Find Max/Min in Array
• Sorting an Array
• Checking if array is already sorted?

4. Conversions

• Array of Primitives to Array to objects
• Convert between Array and List
• Convert between Stream and Array
• Java String to String Array
• Convert String[] to Integer[]

5. Advance Topics

• Java Array Clone
• Java Array Copy
• Java Array Deep Copy
• Java Copy Array Range

Happy Learning !!

Sourcecode on Github