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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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Copyright © 1996 O'Reilly & Associates, Inc.
All Rights Reserved.