| Class | Description | 
|---|---|
| Assert | 
 Provides static helper methods to make runtime assertions. 
 | 
| HostAndPort | 
 A data-only (transfer) object representing a host (InetAddress) and port number
 that together uniquely identify an endpoint for a socket connection. 
 | 
| IoUtil | 
 Contains static I/O-related utility methods. 
 | 
| PatternUtil | 
 Contains static utility methods related to pattern-matching and regular expressions. 
 | 
| PortParser | 
 Utility class for parsing host and port values from command arguments. 
 | 
| StringUtil | 
 Contains static String-related utility methods. 
 | 
| Exception | Description | 
|---|---|
| AssertFailedException | 
 Exception that indicates that a runtime assertion from the 
  
Assert has failed. | 
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