| Package | Description | 
|---|---|
| java.util | 
 Contains the collections framework, legacy collection classes, event model,
date and time facilities, internationalization, and miscellaneous utility
classes (a string tokenizer, a random-number generator, and a bit array). 
 | 
| java.util.regex | 
 Classes for matching character sequences against patterns specified by regular
expressions. 
 | 
| Class and Description | 
|---|
| MatchResult
 The result of a match operation. 
 | 
| Pattern
 A compiled representation of a regular expression. 
 | 
| Class and Description | 
|---|
| Matcher
 An engine that performs match operations on a  
character sequence by interpreting a Pattern. | 
| MatchResult
 The result of a match operation. 
 | 
| Pattern
 A compiled representation of a regular expression. 
 | 
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