U

Index

[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z]

unary operators
        ! (boolean NOT) operator
        - (negation) operator
        operand number and type
        right-to-left associativity
        ~ (bitwise complement)
unbounded wildcards
unboxing conversions [See boxing and unboxing conversions]
uncaught exceptions in threads 2nd 3rd
UncaughtExceptionHandler
unchecked exceptions
unchecked warnings, raw types and
UndeclaredThrowableException 2nd
unicast events
        registering listener for
Unicode 2nd
        byte-to-character conversions 2nd
        char data type
        characters in Java names
        CharBuffer class
        converting strings to/from bytes
        currency symbols in identifiers
        escape sequences
        escaping in char literals
        IllegalFormatCodePointException
        native2ascii tool and
        subsets of
                UnicodeBlock class
        supplementary characters
                Character class methods for
                String methods for
        UTF-8 encoding 2nd 3rd 4th
                converting Latin-1 to
                malformed strings
                writing with DataOutputStream
        UTFDataFormatException
        Version 3.0 Bidirectional Algorithm
        versions
union type (C language)
Universal Time (UTC)
Universal Unique Identifier (UUID)
Unix
        classpath, specifying
        emacs text editor
        file and path separators
        Java interpreter
        pipes
        root directory
        threads for Java interpreter and Classic VM
UnknownError
UnknownFormatConversionException
UnknownFormatFlagsException
UnknownHostException
UnknownServiceException
UnmappableCharsetException
unmodifiable methods (Collection)
UnmodifiableClassException
unnamed packages
unordered collection with duplicate elements (bag)
unpack200 tool
Unpacker interface (Pack200)
unread( )
        PushbackInputStream class
        PushbackReader class
UnrecoverableEntryException
UnrecoverableKeyException
UnresolvedAddressException
UnresolvedAddressTypeException
UnresolvedPermission class
UnsatisfiedLinkError
unsigned right shift operator (>>>) 2nd
unsigned values
        reading and returning as int values
UnsupportedCallbackException
UnsupportedCharsetException
UnsupportedClassVersionError
UnsupportedEncodingException
UnsupportedOperationException 2nd 3rd 4th
until loops
untrusted code
        access control
                fine-grained levels in Java 1.2
                sandbox (Java 1.0)
        application programming, use in
        byte-code verification of class files
unwrap( ) (SSLEngine) 2nd
update( )
        Checksum interface
        Cipher class
        MessageDigest class 2nd
        Observable class
        Observer interface
        Signature class
upper-bounded wildcards
URIs (Uniform Resource Identifiers)
        URI class
URIs (Universal Resource Identifiers)
        URIResolver interface
        URISyntaxException
        XML namespaces
URLConnection class
        caching retrieved network resources
URLs (Uniform Resource Locators)
        https \:
        HttpsURLConnection
        HttpURLConnection class
        JarURLConnection
        javadoc-generated documents
        keystore file
        MalformedURLException
        URL class 2nd 3rd
                caching retrieved network resources
        URLClassLoader class 2nd
                permissions to loaded code
        URLConnection class 2nd
        URLDecoder class
        URLEncoder class
        URLStreamHandler class
US-ASCII charset
useProtocolVersion( ) (ObjectOutputStream)
user preferences [See preferences]
UserDataHandler interface (DOM)
username and password, encapsulating
userNodeForPackage( ) (Preferences)
users, security for
UTC (Universal Time)
UTF-8 [See Unicode]
UTFDataFormatException
utility classes
        packages
UUID class