How Are Regular Expressions Represented in This Package?
The java.util.regex package primarily consists of three classes: Pattern, Matcher, and PatternSyntaxException.
A Pattern object is a compiled representation of a regular
expression. The Pattern class provides no public constructors. To create
a pattern, you must first invoke one of its public static compile
methods, which will then return a Pattern object. These methods accept a
regular expression as the first argument; the first few lessons of this
trail will teach you the required syntax.
A Matcher object is the engine that interprets the pattern and
performs match operations against an input string. Like the Pattern
class, Matcher defines no public constructors. You obtain a Matcher
object by invoking the matcher method on a Pattern object.
A PatternSyntaxException object is an unchecked exception that indicates a syntax error in a regular expression pattern.
Bibliography:
https://docs.oracle.com, https://www.iupui.edu/, Pemrograman Java; R.H. Sianipar, Pemrograman Java; Abdul Kadir, Pemrograman Java; Ir. Yuniar Supardi, Head First Java; Kathy Sierra, Java A Beginner's Guide; Herbert Schildt
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