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U

UDPDatagramConnection - interface javax.microedition.io.UDPDatagramConnection.

This interface defines a datagram connection which knows it's local end point address.

UK - Static variable in class java.util.Locale

Useful constant for country.

UNASSIGNED - Static variable in class java.lang.Character

General category "Cn" in the Unicode specification.

UNAUTHORIZED_INTERMEDIATE_CA - Static variable in class javax.microedition.pki.CertificateException

Indicates an intermediate certificate in the chain does not have the authority to be a intermediate CA.

UNDECIMBER - Static variable in class java.util.Calendar

Value of the MONTH field indicating the thirteenth month of the year.

UNIFIED_CANADIAN_ABORIGINAL_SYLLABICS - Static variable in class java.lang.Character.UnicodeBlock

Constant for the Unicode character block of the same name.

UNINITIALIZED - Static variable in class java.security.Signature

Possible Signature.state value, signifying that this signature object has not yet been initialized.

UNRECOGNIZED_ISSUER - Static variable in class javax.microedition.pki.CertificateException

Indicates a certificate was issued by an unrecognized entity.

UNSUPPORTED_PUBLIC_KEY_TYPE - Static variable in class javax.microedition.pki.CertificateException

Indicates that type of the public key in a certificate is not supported by the device.

UNSUPPORTED_SIGALG - Static variable in class javax.microedition.pki.CertificateException

Indicates a certificate was signed using an unsupported algorithm.

UPPERCASE_LETTER - Static variable in class java.lang.Character

General category "Lu" in the Unicode specification.

URI - class java.net.URI.

Represents a Uniform Resource Identifier (URI) reference.

URI(String) - Constructor for class java.net.URI

Constructs a URI by parsing the given string.

URI(String, String, String, int, String, String, String) - Constructor for class java.net.URI

Constructs a hierarchical URI from the given components.

URI(String, String, String, String, String) - Constructor for class java.net.URI

Constructs a hierarchical URI from the given components.

URI(String, String, String, String) - Constructor for class java.net.URI

Constructs a hierarchical URI from the given components.

URI(String, String, String) - Constructor for class java.net.URI

Constructs a URI from the given components.

URISyntaxException - exception java.net.URISyntaxException.

Checked exception thrown to indicate that a string could not be parsed as a URI reference.

URISyntaxException(String, String, int) - Constructor for class java.net.URISyntaxException

Constructs an instance from the given input string, reason, and error index.

URISyntaxException(String, String) - Constructor for class java.net.URISyntaxException

Constructs an instance from the given input string and reason.

URL - class java.net.URL.

Class URL represents a Uniform Resource Locator, a pointer to a "resource" on the World Wide Web.

URL(String, String, int, String) - Constructor for class java.net.URL

Creates a URL object from the specified protocol, host, port number, and file.

URL(String, String, String) - Constructor for class java.net.URL

Creates a URL from the specified protocol name, host name, and file name.

URL(String, String, int, String, URLStreamHandler) - Constructor for class java.net.URL

Creates a URL object from the specified protocol, host, port number, file, and handler.

URL(String) - Constructor for class java.net.URL

Creates a URL object from the String representation.

URL(URL, String) - Constructor for class java.net.URL

Creates a URL by parsing the given spec within a specified context.

URL(URL, String, URLStreamHandler) - Constructor for class java.net.URL

Creates a URL by parsing the given spec with the specified handler within a specified context.

URLClassLoader - class java.net.URLClassLoader.

This class loader is used to load classes and resources from a search path of URLs referring to both JAR files and directories.

URLClassLoader(URL[], ClassLoader) - Constructor for class java.net.URLClassLoader

Constructs a new URLClassLoader for the given URLs.

URLClassLoader(URL[]) - Constructor for class java.net.URLClassLoader

Constructs a new URLClassLoader for the specified URLs using the default delegation parent ClassLoader.

URLClassLoader(URL[], ClassLoader, URLStreamHandlerFactory) - Constructor for class java.net.URLClassLoader

Constructs a new URLClassLoader for the specified URLs, parent class loader, and URLStreamHandlerFactory.

URLConnection - class java.net.URLConnection.

The abstract class URLConnection is the superclass of all classes that represent a communications link between the application and a URL.

URLConnection(URL) - Constructor for class java.net.URLConnection

Constructs a URL connection to the specified URL.

URLDecoder - class java.net.URLDecoder.

Utility class for HTML form decoding.

URLDecoder() - Constructor for class java.net.URLDecoder

URLEncoder - class java.net.URLEncoder.

Utility class for HTML form encoding.

URLStreamHandler - class java.net.URLStreamHandler.

The abstract class URLStreamHandler is the common superclass for all stream protocol handlers.

URLStreamHandler() - Constructor for class java.net.URLStreamHandler

URLStreamHandlerFactory - interface java.net.URLStreamHandlerFactory.

This interface defines a factory for URL stream protocol handlers.

US - Static variable in class java.util.Locale

Useful constant for country.

UTC_TIME - Static variable in class java.util.SimpleTimeZone

Constant for a mode of start or end time specified as UTC.

UTFDataFormatException - exception java.io.UTFDataFormatException.

Signals that a malformed UTF-8 string has been read in a data input stream or by any class that implements the data input interface.

UTFDataFormatException() - Constructor for class java.io.UTFDataFormatException

Constructs a UTFDataFormatException with null as its error detail message.

UTFDataFormatException(String) - Constructor for class java.io.UTFDataFormatException

Constructs a UTFDataFormatException with the specified detail message.

UndeclaredThrowableException - exception java.lang.reflect.UndeclaredThrowableException.

Thrown by a method invocation on a proxy instance if its invocation handler's invoke method throws a checked exception (a Throwable that is not assignable to RuntimeException or Error) that is not assignable to any of the exception types declared in the throws clause of the method that was invoked on the proxy instance and dispatched to the invocation handler.

UndeclaredThrowableException(Throwable) - Constructor for class java.lang.reflect.UndeclaredThrowableException

Constructs an UndeclaredThrowableException with the specified Throwable.

UndeclaredThrowableException(Throwable, String) - Constructor for class java.lang.reflect.UndeclaredThrowableException

Constructs an UndeclaredThrowableException with the specified Throwable and a detail message.

UnknownError - error java.lang.UnknownError.

Thrown when an unknown but serious exception has occurred in the Java Virtual Machine.

UnknownError() - Constructor for class java.lang.UnknownError

Constructs an UnknownError with no detail message.

UnknownError(String) - Constructor for class java.lang.UnknownError

Constructs an UnknownError with the specified detail message.

UnknownHostException - exception java.net.UnknownHostException.

Thrown to indicate that the IP address of a host could not be determined.

UnknownHostException(String) - Constructor for class java.net.UnknownHostException

Constructs a new UnknownHostException with the specified detail message.

UnknownHostException() - Constructor for class java.net.UnknownHostException

Constructs a new UnknownHostException with no detail message.

UnknownServiceException - exception java.net.UnknownServiceException.

Thrown to indicate that an unknown service exception has occurred.

UnknownServiceException() - Constructor for class java.net.UnknownServiceException

Constructs a new UnknownServiceException with no detail message.

UnknownServiceException(String) - Constructor for class java.net.UnknownServiceException

Constructs a new UnknownServiceException with the specified detail message.

UnrecoverableKeyException - exception java.security.UnrecoverableKeyException.

This exception is thrown if a key in the keystore cannot be recovered.

UnrecoverableKeyException() - Constructor for class java.security.UnrecoverableKeyException

Constructs an UnrecoverableKeyException with no detail message.

UnrecoverableKeyException(String) - Constructor for class java.security.UnrecoverableKeyException

Constructs an UnrecoverableKeyException with the specified detail message, which provides more information about why this exception has been thrown.

UnresolvedPermission - class java.security.UnresolvedPermission.

The UnresolvedPermission class is used to hold Permissions that were "unresolved" when the Policy was initialized.

UnresolvedPermission(String, String, String, Certificate[]) - Constructor for class java.security.UnresolvedPermission

Creates a new UnresolvedPermission containing the permission information needed later to actually create a Permission of the specified class, when the permission is resolved.

UnsatisfiedLinkError - error java.lang.UnsatisfiedLinkError.

Thrown if the Java Virtual Machine cannot find an appropriate native-language definition of a method declared native.

UnsatisfiedLinkError() - Constructor for class java.lang.UnsatisfiedLinkError

Constructs an UnsatisfiedLinkError with no detail message.

UnsatisfiedLinkError(String) - Constructor for class java.lang.UnsatisfiedLinkError

Constructs an UnsatisfiedLinkError with the specified detail message.

UnsupportedClassVersionError - error java.lang.UnsupportedClassVersionError.

Thrown when the Java Virtual Machine attempts to read a class file and determines that the major and minor version numbers in the file are not supported.

UnsupportedClassVersionError() - Constructor for class java.lang.UnsupportedClassVersionError

Constructs a UnsupportedClassVersionError with no detail message.

UnsupportedClassVersionError(String) - Constructor for class java.lang.UnsupportedClassVersionError

Constructs a UnsupportedClassVersionError with the specified detail message.

UnsupportedEncodingException - exception java.io.UnsupportedEncodingException.

The Character Encoding is not supported.

UnsupportedEncodingException() - Constructor for class java.io.UnsupportedEncodingException

Constructs an UnsupportedEncodingException without a detail message.

UnsupportedEncodingException(String) - Constructor for class java.io.UnsupportedEncodingException

Constructs an UnsupportedEncodingException with a detail message.

UnsupportedOperationException - exception java.lang.UnsupportedOperationException.

Thrown to indicate that the requested operation is not supported.

UnsupportedOperationException() - Constructor for class java.lang.UnsupportedOperationException

Constructs an UnsupportedOperationException with no detail message.

UnsupportedOperationException(String) - Constructor for class java.lang.UnsupportedOperationException

Constructs an UnsupportedOperationException with the specified detail message.

uncaughtException(Thread, Throwable) - Method in class java.lang.ThreadGroup

Called by the Java Virtual Machine when a thread in this thread group stops because of an uncaught exception.

unmodifiableCollection(Collection) - Static method in class java.util.Collections

Returns an unmodifiable view of the specified collection.

unmodifiableList(List) - Static method in class java.util.Collections

Returns an unmodifiable view of the specified list.

unmodifiableMap(Map) - Static method in class java.util.Collections

Returns an unmodifiable view of the specified map.

unmodifiableSet(Set) - Static method in class java.util.Collections

Returns an unmodifiable view of the specified set.

unmodifiableSortedMap(SortedMap) - Static method in class java.util.Collections

Returns an unmodifiable view of the specified sorted map.

unmodifiableSortedSet(SortedSet) - Static method in class java.util.Collections

Returns an unmodifiable view of the specified sorted set.

unread(int) - Method in class java.io.PushbackInputStream

Pushes back a byte by copying it to the front of the pushback buffer.

unread(byte[], int, int) - Method in class java.io.PushbackInputStream

Pushes back a portion of an array of bytes by copying it to the front of the pushback buffer.

unread(byte[]) - Method in class java.io.PushbackInputStream

Pushes back an array of bytes by copying it to the front of the pushback buffer.

unread(int) - Method in class java.io.PushbackReader

Push back a single character.

unread(char[], int, int) - Method in class java.io.PushbackReader

Push back a portion of an array of characters by copying it to the front of the pushback buffer.

unread(char[]) - Method in class java.io.PushbackReader

Push back an array of characters by copying it to the front of the pushback buffer.

unscaledValue() - Method in class java.math.BigDecimal

Returns a BigInteger whose value is the unscaled value of this BigDecimal.

update(byte) - Method in class java.security.MessageDigest

Updates the digest using the specified byte.

update(byte[], int, int) - Method in class java.security.MessageDigest

Updates the digest using the specified array of bytes, starting at the specified offset.

update(byte[]) - Method in class java.security.MessageDigest

Updates the digest using the specified array of bytes.

update(byte) - Method in class java.security.Signature

Updates the data to be signed or verified by a byte.

update(byte[]) - Method in class java.security.Signature

Updates the data to be signed or verified, using the specified array of bytes.

update(byte[], int, int) - Method in class java.security.Signature

Updates the data to be signed or verified, using the specified array of bytes, starting at the specified offset.

update(Observable, Object) - Method in interface java.util.Observer

This method is called whenever the observed object is changed.

update(int) - Method in class java.util.zip.Adler32

Updates checksum with specified byte.

update(byte[], int, int) - Method in class java.util.zip.Adler32

Updates checksum with specified array of bytes.

update(byte[]) - Method in class java.util.zip.Adler32

Updates checksum with specified array of bytes.

update(int) - Method in class java.util.zip.CRC32

Updates CRC-32 with specified byte.

update(byte[], int, int) - Method in class java.util.zip.CRC32

Updates CRC-32 with specified array of bytes.

update(byte[]) - Method in class java.util.zip.CRC32

Updates checksum with specified array of bytes.

update(int) - Method in interface java.util.zip.Checksum

Updates the current checksum with the specified byte.

update(byte[], int, int) - Method in interface java.util.zip.Checksum

Updates the current checksum with the specified array of bytes.

url - Variable in class java.net.URLConnection

The URL represents the remote object on the World Wide Web to which this connection is opened.

useCaches - Variable in class java.net.URLConnection

If true, the protocol is allowed to use caching whenever it can.

useDaylightTime() - Method in class java.util.SimpleTimeZone

Queries if this time zone uses daylight saving time.

useDaylightTime() - Method in class java.util.TimeZone

Queries if this time zone uses daylight savings time.

useProtocolVersion(int) - Method in class java.io.ObjectOutputStream

Specify stream protocol version to use when writing the stream.

usingProxy() - Method in class java.net.HttpURLConnection

Indicates if the connection is going through a proxy.