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U

UCS (universal character set)
Glossary
UDP (User Datagram Protocol)
Datagram Sockets
Glossary
unary minus (-) operator : Operators
unary plus (+) operator : Operators
Unicode character encoding
Text Encoding
Glossary
Uniform Resource Names (URNs)
Packages
Working with URLs
UnknownHostException
Clients
HeartBeat
UnknownServiceException : Stream Data
unnamed packages : The Unnamed Package
unreachable statements : Statements
update( )
Painting and Updating
Basic Drawing
using effectively : Drawing Techniques
updating
GUI components : Painting and Updating
image data : Image Producers and Consumers
URLConnection (class)
Web Browsers and Handlers
The URLConnection
URLs, Stream Handlers, and Connections
The URLConnection
URLContentHandler (class) : Web Browsers and Handlers
URLs (Uniform Resource Locators)
Network Programming
Working with URLs
base versus relative : Working with URLs
parsing : java.util.StringTokenizer
streams and : Stream Data
URL class : The URL class
of vendor : System Properties
URLStreamHandler (class) : Writing a Protocol Handler
URLStreamHandlerFactory (object) : Writing a Protocol Handler
URNs (Uniform Resource Names)
Packages
Working with URLs
User Datagram Protocol (UDP)
Datagram Sockets
Glossary
user-level security : Application and User Level Security
user.dir property
System Properties
File constructors
user.home : System Properties
user.name : System Properties
UTF-8 encoding
Data streams
Glossary


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