A family of character subsets representing the character blocks in the
Unicode specification. Character blocks generally define characters
used for a specific script or purpose. A character is contained by
at most one Unicode block.
Constant for the "Aegean Numbers" Unicode character block.
Constant for the "Alphabetic Presentation Forms" Unicode character block.
Constant for the "Arabic" Unicode character block.
Constant for the "Arabic Presentation Forms-A" Unicode character block.
Constant for the "Arabic Presentation Forms-B" Unicode character block.
Constant for the "Armenian" Unicode character block.
Constant for the "Arrows" Unicode character block.
Constant for the "Basic Latin" Unicode character block.
Constant for the "Bengali" Unicode character block.
Constant for the "Block Elements" Unicode character block.
Constant for the "Bopomofo" Unicode character block.
Constant for the "Bopomofo Extended" Unicode character block.
Constant for the "Box Drawing" Unicode character block.
Constant for the "Braille Patterns" Unicode character block.
Constant for the "Buhid" Unicode character block.
Constant for the "Byzantine Musical Symbols" Unicode character block.
Constant for the "Cherokee" Unicode character block.
Constant for the "CJK Compatibility" Unicode character block.
Constant for the "CJK Compatibility Forms" Unicode character block.
Constant for the "CJK Compatibility Ideographs" Unicode character block.
Constant for the "CJK Compatibility Ideographs Supplement" Unicode character block.
Constant for the "CJK Radicals Supplement" Unicode character block.
Constant for the "CJK Symbols and Punctuation" Unicode character block.
Constant for the "CJK Unified Ideographs" Unicode character block.
Constant for the "CJK Unified Ideographs Extension A" Unicode character block.
Constant for the "CJK Unified Ideographs Extension B" Unicode character block.
Constant for the "Combining Diacritical Marks" Unicode character block.
Constant for the "Combining Half Marks" Unicode character block.
Constant for the "Combining Diacritical Marks for Symbols" Unicode character block.
This block was previously known as "Combining Marks for Symbols".
Constant for the "Control Pictures" Unicode character block.
Constant for the "Currency Symbols" Unicode character block.
Constant for the "Cypriot Syllabary" Unicode character block.
Constant for the "Cyrillic" Unicode character block.
Constant for the "Cyrillic Supplementary" Unicode character block.
Constant for the "Deseret" Unicode character block.
Constant for the "Devanagari" Unicode character block.
Constant for the "Dingbats" Unicode character block.
Constant for the "Enclosed Alphanumerics" Unicode character block.
Constant for the "Enclosed CJK Letters and Months" Unicode character block.
Constant for the "Ethiopic" Unicode character block.
Constant for the "General Punctuation" Unicode character block.
Constant for the "Geometric Shapes" Unicode character block.
Constant for the "Georgian" Unicode character block.
Constant for the "Gothic" Unicode character block.
Constant for the "Greek and Coptic" Unicode character block.
This block was previously known as the "Greek" block.
Constant for the "Greek Extended" Unicode character block.
Constant for the "Gujarati" Unicode character block.
Constant for the "Gurmukhi" Unicode character block.
Constant for the "Halfwidth and Fullwidth Forms" Unicode character block.
Constant for the "Hangul Compatibility Jamo" Unicode character block.
Constant for the "Hangul Jamo" Unicode character block.
Constant for the "Hangul Syllables" Unicode character block.
Constant for the "Hanunoo" Unicode character block.
Constant for the "Hebrew" Unicode character block.
Constant for the "High Private Use Surrogates" Unicode character block.
This block represents codepoint values in the high surrogate
range: 0xDB80 through 0xDBFF
Constant for the "High Surrogates" Unicode character block.
This block represents codepoint values in the high surrogate
range: 0xD800 through 0xDB7F
Constant for the "Hiragana" Unicode character block.
Constant for the "Ideographic Description Characters" Unicode character block.
Constant for the "IPA Extensions" Unicode character block.
Constant for the "Kanbun" Unicode character block.
Constant for the "Kangxi Radicals" Unicode character block.
Constant for the "Kannada" Unicode character block.
Constant for the "Katakana" Unicode character block.
Constant for the "Katakana Phonetic Extensions" Unicode character block.
Constant for the "Khmer" Unicode character block.
Constant for the "Khmer Symbols" Unicode character block.
Constant for the "Lao" Unicode character block.
Constant for the "Latin-1 Supplement" Unicode character block.
Constant for the "Latin Extended-A" Unicode character block.
Constant for the "Latin Extended Additional" Unicode character block.
Constant for the "Latin Extended-B" Unicode character block.
Constant for the "Letterlike Symbols" Unicode character block.
Constant for the "Limbu" Unicode character block.
Constant for the "Linear B Ideograms" Unicode character block.
Constant for the "Linear B Syllabary" Unicode character block.
Constant for the "Low Surrogates" Unicode character block.
This block represents codepoint values in the high surrogate
range: 0xDC00 through 0xDFFF
Constant for the "Malayalam" Unicode character block.
Constant for the "Mathematical Alphanumeric Symbols" Unicode character block.
Constant for the "Mathematical Operators" Unicode character block.
Constant for the "Miscellaneous Mathematical Symbols-A" Unicode character block.
Constant for the "Miscellaneous Mathematical Symbols-B" Unicode character block.
Constant for the "Miscellaneous Symbols" Unicode character block.
Constant for the "Miscellaneous Symbols and Arrows" Unicode character block.
Constant for the "Miscellaneous Technical" Unicode character block.
Constant for the "Mongolian" Unicode character block.
Constant for the "Musical Symbols" Unicode character block.
Constant for the "Myanmar" Unicode character block.
Constant for the "Number Forms" Unicode character block.
Constant for the "Ogham" Unicode character block.
Constant for the "Old Italic" Unicode character block.
Constant for the "Optical Character Recognition" Unicode character block.
Constant for the "Oriya" Unicode character block.
Constant for the "Osmanya" Unicode character block.
Constant for the "Phonetic Extensions" Unicode character block.
Constant for the "Private Use Area" Unicode character block.
Constant for the "Runic" Unicode character block.
Constant for the "Shavian" Unicode character block.
Constant for the "Sinhala" Unicode character block.
Constant for the "Small Form Variants" Unicode character block.
Constant for the "Spacing Modifier Letters" Unicode character block.
Constant for the "Specials" Unicode character block.
Constant for the "Superscripts and Subscripts" Unicode character block.
Constant for the "Supplemental Arrows-A" Unicode character block.
Constant for the "Supplemental Arrows-B" Unicode character block.
Constant for the "Supplemental Mathematical Operators" Unicode character block.
Constant for the "Supplementary Private Use Area-A" Unicode character block.
Constant for the "Supplementary Private Use Area-B" Unicode character block.
Constant for the "Syriac" Unicode character block.
Constant for the "Tagalog" Unicode character block.
Constant for the "Tagbanwa" Unicode character block.
Constant for the "Tags" Unicode character block.
Constant for the "Tai Le" Unicode character block.
Constant for the "Tai Xuan Jing Symbols" Unicode character block.
Constant for the "Tamil" Unicode character block.
Constant for the "Telugu" Unicode character block.
Constant for the "Thaana" Unicode character block.
Constant for the "Thai" Unicode character block.
Constant for the "Tibetan" Unicode character block.
Constant for the "Ugaritic" Unicode character block.
Constant for the "Unified Canadian Aboriginal Syllabics" Unicode character block.
Constant for the "Variation Selectors" Unicode character block.
Constant for the "Variation Selectors Supplement" Unicode character block.
Constant for the "Yi Radicals" Unicode character block.
Constant for the "Yi Syllables" Unicode character block.
Constant for the "Yijing Hexagram Symbols" Unicode character block.
Compares two Subset
objects for equality.
This method returns true
if and only if
this
and the argument refer to the same
object; since this method is final
, this
guarantee holds for all subclasses.
Returns the UnicodeBlock with the given name. Block
names are determined by The Unicode Standard. The file
Blocks-<version>.txt defines blocks for a particular
version of the standard. The
Character
class specifies
the version of the standard that it supports.
This method accepts block names in the following forms:
- Canonical block names as defined by the Unicode Standard.
For example, the standard defines a "Basic Latin" block. Therefore, this
method accepts "Basic Latin" as a valid block name. The documentation of
each UnicodeBlock provides the canonical name.
- Canonical block names with all spaces removed. For example, "BasicLatin"
is a valid block name for the "Basic Latin" block.
- The text representation of each constant UnicodeBlock identifier.
For example, this method will return the #BASIC_LATIN
block if
provided with the "BASIC_LATIN" name. This form replaces all spaces and
hyphens in the canonical name with underscores.
Finally, character case is ignored for all of the valid block name forms.
For example, "BASIC_LATIN" and "basic_latin" are both valid block names.
The en_US locale's case mapping rules are used to provide case-insensitive
string comparisons for block name validation.
If the Unicode Standard changes block names, both the previous and
current names will be accepted.
Returns the runtime class of an object. That Class
object is the object that is locked by static synchronized
methods of the represented class.
Returns the standard hash code as defined by the
Object#hashCode
method. This method
is
final
in order to ensure that the
equals
and
hashCode
methods will
be consistent in all subclasses.
Wakes up a single thread that is waiting on this object's
monitor. If any threads are waiting on this object, one of them
is chosen to be awakened. The choice is arbitrary and occurs at
the discretion of the implementation. A thread waits on an object's
monitor by calling one of the
wait
methods.
The awakened thread will not be able to proceed until the current
thread relinquishes the lock on this object. The awakened thread will
compete in the usual manner with any other threads that might be
actively competing to synchronize on this object; for example, the
awakened thread enjoys no reliable privilege or disadvantage in being
the next thread to lock this object.
This method should only be called by a thread that is the owner
of this object's monitor. A thread becomes the owner of the
object's monitor in one of three ways:
- By executing a synchronized instance method of that object.
- By executing the body of a
synchronized
statement
that synchronizes on the object.
- For objects of type
Class,
by executing a
synchronized static method of that class.
Only one thread at a time can own an object's monitor.
Wakes up all threads that are waiting on this object's monitor. A
thread waits on an object's monitor by calling one of the
wait
methods.
The awakened threads will not be able to proceed until the current
thread relinquishes the lock on this object. The awakened threads
will compete in the usual manner with any other threads that might
be actively competing to synchronize on this object; for example,
the awakened threads enjoy no reliable privilege or disadvantage in
being the next thread to lock this object.
This method should only be called by a thread that is the owner
of this object's monitor. See the notify
method for a
description of the ways in which a thread can become the owner of
a monitor.
Returns the object representing the Unicode block containing the
given character, or
null
if the character is not a
member of a defined block.
Note: This method cannot handle supplementary
characters. To support all Unicode characters,
including supplementary characters, use the
method.
Returns the object representing the Unicode block
containing the given character (Unicode code point), or
null
if the character is not a member of a
defined block.
Returns the name of this subset.
Causes current thread to wait until another thread invokes the
method or the
method for this object.
In other words, this method behaves exactly as if it simply
performs the call
wait(0).
The current thread must own this object's monitor. The thread
releases ownership of this monitor and waits until another thread
notifies threads waiting on this object's monitor to wake up
either through a call to the notify
method or the
notifyAll
method. The thread then waits until it can
re-obtain ownership of the monitor and resumes execution.
As in the one argument version, interrupts and spurious wakeups are
possible, and this method should always be used in a loop:
synchronized (obj) {
while (<condition does not hold>)
obj.wait();
... // Perform action appropriate to condition
}
This method should only be called by a thread that is the owner
of this object's monitor. See the
notify
method for a
description of the ways in which a thread can become the owner of
a monitor.
Causes current thread to wait until either another thread invokes the
method or the
method for this object, or a
specified amount of time has elapsed.
The current thread must own this object's monitor.
This method causes the current thread (call it T) to
place itself in the wait set for this object and then to relinquish
any and all synchronization claims on this object. Thread T
becomes disabled for thread scheduling purposes and lies dormant
until one of four things happens:
- Some other thread invokes the notify method for this
object and thread T happens to be arbitrarily chosen as
the thread to be awakened.
- Some other thread invokes the notifyAll method for this
object.
- Some other thread interrupts
thread T.
- The specified amount of real time has elapsed, more or less. If
timeout is zero, however, then real time is not taken into
consideration and the thread simply waits until notified.
The thread
T is then removed from the wait set for this
object and re-enabled for thread scheduling. It then competes in the
usual manner with other threads for the right to synchronize on the
object; once it has gained control of the object, all its
synchronization claims on the object are restored to the status quo
ante - that is, to the situation as of the time that the
wait
method was invoked. Thread
T then returns from the
invocation of the
wait method. Thus, on return from the
wait method, the synchronization state of the object and of
thread
T is exactly as it was when the
wait method
was invoked.
A thread can also wake up without being notified, interrupted, or
timing out, a so-called spurious wakeup. While this will rarely
occur in practice, applications must guard against it by testing for
the condition that should have caused the thread to be awakened, and
continuing to wait if the condition is not satisfied. In other words,
waits should always occur in loops, like this one:
synchronized (obj) {
while (<condition does not hold>)
obj.wait(timeout);
... // Perform action appropriate to condition
}
(For more information on this topic, see Section 3.2.3 in Doug Lea's
"Concurrent Programming in Java (Second Edition)" (Addison-Wesley,
2000), or Item 50 in Joshua Bloch's "Effective Java Programming
Language Guide" (Addison-Wesley, 2001).
If the current thread is
interrupted
by another thread
while it is waiting, then an InterruptedException is thrown.
This exception is not thrown until the lock status of this object has
been restored as described above.
Note that the wait method, as it places the current thread
into the wait set for this object, unlocks only this object; any
other objects on which the current thread may be synchronized remain
locked while the thread waits.
This method should only be called by a thread that is the owner
of this object's monitor. See the notify
method for a
description of the ways in which a thread can become the owner of
a monitor.
Causes current thread to wait until another thread invokes the
method or the
method for this object, or
some other thread interrupts the current thread, or a certain
amount of real time has elapsed.
This method is similar to the wait
method of one
argument, but it allows finer control over the amount of time to
wait for a notification before giving up. The amount of real time,
measured in nanoseconds, is given by:
1000000*timeout+nanos
In all other respects, this method does the same thing as the
method
of one argument. In particular,
wait(0, 0) means the same thing as wait(0).
The current thread must own this object's monitor. The thread
releases ownership of this monitor and waits until either of the
following two conditions has occurred:
- Another thread notifies threads waiting on this object's monitor
to wake up either through a call to the
notify
method
or the notifyAll
method.
- The timeout period, specified by
timeout
milliseconds plus nanos
nanoseconds arguments, has
elapsed.
The thread then waits until it can re-obtain ownership of the
monitor and resumes execution.
As in the one argument version, interrupts and spurious wakeups are
possible, and this method should always be used in a loop:
synchronized (obj) {
while (<condition does not hold>)
obj.wait(timeout, nanos);
... // Perform action appropriate to condition
}
This method should only be called by a thread that is the owner
of this object's monitor. See the
notify
method for a
description of the ways in which a thread can become the owner of
a monitor.