Search icon CANCEL
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Conferences
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
The Java Workshop

You're reading from   The Java Workshop Learn object-oriented programming and kickstart your career in software development

Arrow left icon
Product type Paperback
Published in Oct 2019
Publisher Packt
ISBN-13 9781838986698
Length 606 pages
Edition 1st Edition
Languages
Tools
Arrow right icon
Authors (3):
Arrow left icon
Eric Foster-Johnson Eric Foster-Johnson
Author Profile Icon Eric Foster-Johnson
Eric Foster-Johnson
Andreas Göransson Andreas Göransson
Author Profile Icon Andreas Göransson
Andreas Göransson
David Cuartielles David Cuartielles
Author Profile Icon David Cuartielles
David Cuartielles
Arrow right icon
View More author details
Toc

Table of Contents (20) Chapters Close

Preface 1. Getting Started 2. Learning the Basics FREE CHAPTER 3. Object-Oriented Programming 4. Collections, Lists and Java's Built-In APIs 5. Exceptions 6. Libraries, Packages, and Modules 7. Databases and JDBC 8. Sockets, Files, and Streams 9. Working with HTTP 10. Encryption 11. Processes 12. Regular Expressions 13. Functional Programming with Lambda Expressions 14. Recursion 15. Processing Data with Streams 16. Predicates and Other Functional Interfaces 17. Reactive Programming with Java Flow 18. Unit Testing Appendix

Reading an Existing File

Reading a file can be done in a simple way. The question is about where you will store the data once you have it. We will work with lists, iterate through the lists, and then print out the results to System.out. The next example uses readAllLines() to open the existing file and reads the contents into the computer's memory, putting them into the fileContent list. After that, we use an iterator to go through each line and send them to the Terminal:

import java.io.IOException;
import java.nio.file.*;
import java.util.List;
public class Example08 {
    public static void main(String[] args) {
        String pathString = System.getProperty("user.home") + "/javaTemp/temp.txt";
        Path pathFile = Paths.get(pathString);
        try {
          ...
lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at €18.99/month. Cancel anytime