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Introduction to Programming

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

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Product type Paperback
Published in Jun 2018
Publisher Packt
ISBN-13 9781788839129
Length 722 pages
Edition 1st Edition
Languages
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Author (1):
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Nick Samoylov Nick Samoylov
Author Profile Icon Nick Samoylov
Nick Samoylov
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Toc

Table of Contents (21) Chapters Close

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 20. Other Books You May Enjoy

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...

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