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THE Java™ Programming Language, Fourth Edition by James Gosling, Ken Arnold, David Holmes

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Chapter 13. Strings and Regular Expressions

 

What's the use of a good quotation if you can't change it?

 
 --Dr. Who, The Two Doctors

Strings are standard objects with built-in language support. You have already seen many examples of using string literals to create string objects. You've also seen the + and += operators that concatenate strings to create new strings. The String class, however, has much more functionality to offer. String objects are immutable (read-only), so you also have a StringBuilder class for mutable strings. This chapter describes String and StringBuilder and some related classes, including utilities for regular expression matching.

Character Sequences

As described in “Character Set” on page 161, the Java programming language ...

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