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Learn Java with Projects

You're reading from   Learn Java with Projects A concise practical guide to learning everything a Java professional really needs to know

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Product type Paperback
Published in Nov 2023
Publisher Packt
ISBN-13 9781837637188
Length 598 pages
Edition 1st Edition
Languages
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Authors (2):
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Maaike van Putten Maaike van Putten
Author Profile Icon Maaike van Putten
Maaike van Putten
Dr. Seán Kennedy Dr. Seán Kennedy
Author Profile Icon Dr. Seán Kennedy
Dr. Seán Kennedy
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Table of Contents (22) Chapters Close

Preface 1. Part 1: Java Fundamentals
2. Chapter 1: Getting Started with Java FREE CHAPTER 3. Chapter 2: Variables and Primitive Data Types 4. Chapter 3: Operators and Casting 5. Chapter 4: Conditional Statements 6. Chapter 5: Understanding Iteration 7. Chapter 6: Working with Arrays 8. Chapter 7: Methods 9. Part 2: Object-Oriented Programming
10. Chapter 8: Classes, Objects, and Enums 11. Chapter 9: Inheritance and Polymorphism 12. Chapter 10: Interfaces and Abstract Classes 13. Chapter 11: Dealing with Exceptions 14. Chapter 12: Java Core API 15. Part 3: Advanced Topics
16. Chapter 13: Generics and Collections 17. Chapter 14: Lambda Expressions 18. Chapter 15: Streams – Fundamentals 19. Chapter 16: Streams: Advanced Concepts 20. Chapter 17: Concurrency 21. Index

Handling multidimensional arrays

A multidimensional array is an array of arrays. In Java, you can create arrays with two or more dimensions. The most common type of multidimensional array is the two-dimensional array, also known as a matrix or a table, where the elements are arranged in rows and columns.

Let’s see how to create multidimensional arrays.

Declaring and initializing multidimensional arrays

To declare a two-dimensional array, you need to specify the data type of the elements, followed by two sets of square brackets ([][]) and the name of the array. Take the following example:

int[][] matrix;

Just like the one-dimensional array, we initialize a two-dimensional array with the use of the new keyword, followed by the data type and the size of each dimension inside the square brackets, like this:

matrix = new int[3][4];

This code initializes a matrix of 3 rows and 4 columns. The type is int, so we know that the values of the matrix are integers.

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