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You're reading from Introduction to Programming Learn to program in Java with data structures, algorithms, and logic

Product type Paperback

Published in Jun 2018

Publisher Packt

ISBN-13 9781788839129

Length 722 pages

Edition 1st Edition

Languages

Java

Concepts

Programming Language

Author (1):

Nick Samoylov

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Table of Contents (27) Chapters

Title Page

Dedication

Contributors

Packt Upsell

Preface

1. Java Virtual Machine (JVM) on Your Computer FREE CHAPTER

2. Java Language Basics

3. Your Development Environment Setup

4. Your First Java Project

5. Java Language Elements and Types

6. Interfaces, Classes, and Object Construction

7. Packages and Accessibility (Visibility)

8. Object-Oriented Design (OOD) Principles

9. Operators, Expressions, and Statements

10. Control Flow Statements

11. JVM Processes and Garbage Collection

12. Java Standard and External Libraries

13. Java Collections

14. Managing Collections and Arrays

15. Managing Objects, Strings, Time, and Random Numbers

16. Database Programming

17. Lambda Expressions and Functional Programming

18. Streams and Pipelines

19. Reactive Systems

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Index

Managing strings

The class String is used a lot. So, you have to have a good handle on its functionality. We talked already talked about String value immutability in Chapter 5, Java Language Elements and Types. We have shown that every time a String value is "modified", a new copy of the value is created, which means that in the case of multiple "modifications", many String objects are created, consuming memory and putting a burden on the JVM.

In such cases, it is advisable to use the class java.lang.StringBuilder or java.lang.StringBuffer because they are modifiable objects and do not have an overhead of creating String value copies. We will show how to use them and explain the difference between these two classes in the first part of this section.

After that, we will review the methods of the class String and then provide an overview of the class org.apache.commons.lang3.StringUtils, which complements the class String functionality.