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Ascii (Guava: Google Core Libraries for Java 11.0.1 API)























  
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com.google.common.base


Class Ascii
java.lang.Object
  com.google.common.base.Ascii



@GwtCompatible
public final class Asciiextends Object




Static methods pertaining to ASCII characters (those in the range of values
 0x00 through 0x7F), and to strings containing such
 characters.

 
ASCII utilities also exist in other classes of this package:
 

 
 Charsets.US_ASCII specifies the Charset of ASCII characters.
 
CharMatcher.ASCII matches ASCII characters and provides text processing methods
     which operate only on the ASCII characters of a string.
 




Since:
  7.0
Author:
  Craig Berry, Gregory Kick










Field Summary



static byte
ACK



          Acknowledge: A communication control character transmitted
 by a receiver as an affirmative response to a sender.



static byte
BEL



          Bell ('\a'): A character for use when there is a need to call for
 human attention.



static byte
BS



          Backspace ('\b'): A format effector which controls the movement of
 the printing position one printing space backward on the same
 printing line.



static byte
CAN



          Cancel: A control character used to indicate that the data
 with which it is sent is in error or is to be disregarded.



static byte
CR



          Carriage Return ('\r'): A format effector which controls the
 movement of the printing position to the first printing position on
 the same printing line.



static byte
DC1



          Device Controls: Characters for the control
 of ancillary devices associated with data processing or
 telecommunication systems, more especially switching devices "on" or
 "off."  (If a single "stop" control is required to interrupt or turn
 off ancillary devices, DC4 is the preferred assignment.)



static byte
DC2



           



static byte
DC3



           



static byte
DC4



           



static byte
DEL



          Delete: This character is used primarily to "erase" or
 "obliterate" erroneous or unwanted characters in perforated tape.



static byte
DLE



          Data Link Escape: A communication control character which
 will change the meaning of a limited number of contiguously following
 characters.



static byte
EM



          End of Medium: A control character associated with the sent
 data which may be used to identify the physical end of the medium, or
 the end of the used, or wanted, portion of information recorded on a
 medium.



static byte
ENQ



          Enquiry: A communication control character used in data
 communication systems as a request for a response from a remote
 station.



static byte
EOT



          End of Transmission: A communication control character used
 to indicate the conclusion of a transmission, which may have
 contained one or more texts and any associated headings.



static byte
ESC



          Escape: A control character intended to provide code
 extension (supplementary characters) in general information
 interchange.



static byte
ETB



          End of Transmission Block: A communication control character
 used to indicate the end of a block of data for communication
 purposes.



static byte
ETX



          End of Text: A communication control character used to
 terminate a sequence of characters started with STX and transmitted
 as an entity.



static byte
FF



          Form Feed ('\f'): A format effector which controls the movement of
 the printing position to the first pre-determined printing line on
 the next form or page.



static byte
FS



          File/Group/Record/Unit Separator: These information separators may be
 used within data in optional fashion, except that their hierarchical
 relationship shall be: FS is the most inclusive, then GS, then RS,
 and US is least inclusive.



static byte
GS



           



static byte
HT



          Horizontal Tabulation ('\t'): A format effector which controls the
 movement of the printing position to the next in a series of
 predetermined positions along the printing line.



static byte
LF



          Line Feed ('\n'): A format effector which controls the movement of
 the printing position to the next printing line.



static int
MAX



          The maximum value of an ASCII character.



static int
MIN



          The minimum value of an ASCII character.



static byte
NAK



          Negative Acknowledge: A communication control character
 transmitted by a receiver as a negative response to the sender.



static byte
NL



          Alternate name for LF.



static byte
NUL



          Null ('\0'): The all-zeros character which may serve to accomplish
 time fill and media fill.



static byte
RS



           



static byte
SI



          Shift In: A control character indicating that the code
 combinations which follow shall be interpreted according to the
 standard code table.



static byte
SO



          Shift Out: A control character indicating that the code
 combinations which follow shall be interpreted as outside of the
 character set of the standard code table until a Shift In character
 is reached.



static byte
SOH



          Start of Heading: A communication control character used at
 the beginning of a sequence of characters which constitute a
 machine-sensible address or routing information.



static byte
SP



          Space: A normally non-printing graphic character used to
 separate words.



static byte
SPACE



          Alternate name for SP.



static byte
STX



          Start of Text: A communication control character which
 precedes a sequence of characters that is to be treated as an entity
 and entirely transmitted through to the ultimate destination.



static byte
SUB



          Substitute: A character that may be substituted for a
 character which is determined to be invalid or in error.



static byte
SYN



          Synchronous Idle: A communication control character used by
 a synchronous transmission system in the absence of any other
 character to provide a signal from which synchronism may be achieved
 or retained.



static byte
US



           



static byte
VT



          Vertical Tabulation ('\v'): A format effector which controls the
 movement of the printing position to the next in a series of
 predetermined printing lines.



static byte
XOFF



          Transmission off.



static byte
XON



          Transmission on/off: Although originally defined as DC1, this ASCII
 control character is now better known as the XON code used for software
 flow control in serial communications.


 






Method Summary



static boolean
isLowerCase(char c)



          Indicates whether c is one of the twenty-six lowercase ASCII alphabetic characters
 between 'a' and 'z' inclusive.



static boolean
isUpperCase(char c)



          Indicates whether c is one of the twenty-six uppercase ASCII alphabetic characters
 between 'A' and 'Z' inclusive.



static char
toLowerCase(char c)



          If the argument is an uppercase ASCII character returns the
 lowercase equivalent.



static String
toLowerCase(String string)



          Returns a copy of the input string in which all uppercase ASCII
 characters have been converted to lowercase.



static char
toUpperCase(char c)



          If the argument is a lowercase ASCII character returns the
 uppercase equivalent.



static String
toUpperCase(String string)



          Returns a copy of the input string in which all lowercase ASCII
 characters have been converted to uppercase.


 


Methods inherited from class java.lang.Object


clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait


 








Field Detail




NUL
public static final byte NUL

Null ('\0'): The all-zeros character which may serve to accomplish
 time fill and media fill.  Normally used as a C string terminator.
 Although RFC 20 names this as "Null", note that it is distinct
 from the C/C++ "NULL" pointer.


Since:
  8.0
See Also:
Constant Field Values




SOH
public static final byte SOH

Start of Heading: A communication control character used at
 the beginning of a sequence of characters which constitute a
 machine-sensible address or routing information.  Such a sequence is
 referred to as the "heading."  An STX character has the effect of
 terminating a heading.


Since:
  8.0
See Also:
Constant Field Values




STX
public static final byte STX

Start of Text: A communication control character which
 precedes a sequence of characters that is to be treated as an entity
 and entirely transmitted through to the ultimate destination.  Such a
 sequence is referred to as "text."  STX may be used to terminate a
 sequence of characters started by SOH.


Since:
  8.0
See Also:
Constant Field Values




ETX
public static final byte ETX

End of Text: A communication control character used to
 terminate a sequence of characters started with STX and transmitted
 as an entity.


Since:
  8.0
See Also:
Constant Field Values




EOT
public static final byte EOT

End of Transmission: A communication control character used
 to indicate the conclusion of a transmission, which may have
 contained one or more texts and any associated headings.


Since:
  8.0
See Also:
Constant Field Values




ENQ
public static final byte ENQ

Enquiry: A communication control character used in data
 communication systems as a request for a response from a remote
 station.  It may be used as a "Who Are You" (WRU) to obtain
 identification, or may be used to obtain station status, or both.


Since:
  8.0
See Also:
Constant Field Values




ACK
public static final byte ACK

Acknowledge: A communication control character transmitted
 by a receiver as an affirmative response to a sender.


Since:
  8.0
See Also:
Constant Field Values




BEL
public static final byte BEL

Bell ('\a'): A character for use when there is a need to call for
 human attention.  It may control alarm or attention devices.


Since:
  8.0
See Also:
Constant Field Values




BS
public static final byte BS

Backspace ('\b'): A format effector which controls the movement of
 the printing position one printing space backward on the same
 printing line.  (Applicable also to display devices.)


Since:
  8.0
See Also:
Constant Field Values




HT
public static final byte HT

Horizontal Tabulation ('\t'): A format effector which controls the
 movement of the printing position to the next in a series of
 predetermined positions along the printing line.  (Applicable also to
 display devices and the skip function on punched cards.)


Since:
  8.0
See Also:
Constant Field Values




LF
public static final byte LF

Line Feed ('\n'): A format effector which controls the movement of
 the printing position to the next printing line.  (Applicable also to
 display devices.) Where appropriate, this character may have the
 meaning "New Line" (NL), a format effector which controls the
 movement of the printing point to the first printing position on the
 next printing line.  Use of this convention requires agreement
 between sender and recipient of data.


Since:
  8.0
See Also:
Constant Field Values




NL
public static final byte NL

Alternate name for LF.  (LF is preferred.)


Since:
  8.0
See Also:
Constant Field Values




VT
public static final byte VT

Vertical Tabulation ('\v'): A format effector which controls the
 movement of the printing position to the next in a series of
 predetermined printing lines.  (Applicable also to display devices.)


Since:
  8.0
See Also:
Constant Field Values




FF
public static final byte FF

Form Feed ('\f'): A format effector which controls the movement of
 the printing position to the first pre-determined printing line on
 the next form or page.  (Applicable also to display devices.)


Since:
  8.0
See Also:
Constant Field Values




CR
public static final byte CR

Carriage Return ('\r'): A format effector which controls the
 movement of the printing position to the first printing position on
 the same printing line.  (Applicable also to display devices.)


Since:
  8.0
See Also:
Constant Field Values




SO
public static final byte SO

Shift Out: A control character indicating that the code
 combinations which follow shall be interpreted as outside of the
 character set of the standard code table until a Shift In character
 is reached.


Since:
  8.0
See Also:
Constant Field Values




SI
public static final byte SI

Shift In: A control character indicating that the code
 combinations which follow shall be interpreted according to the
 standard code table.


Since:
  8.0
See Also:
Constant Field Values




DLE
public static final byte DLE

Data Link Escape: A communication control character which
 will change the meaning of a limited number of contiguously following
 characters.  It is used exclusively to provide supplementary controls
 in data communication networks.


Since:
  8.0
See Also:
Constant Field Values




DC1
public static final byte DC1

Device Controls: Characters for the control
 of ancillary devices associated with data processing or
 telecommunication systems, more especially switching devices "on" or
 "off."  (If a single "stop" control is required to interrupt or turn
 off ancillary devices, DC4 is the preferred assignment.)


Since:
  8.0
See Also:
Constant Field Values




XON
public static final byte XON

Transmission on/off: Although originally defined as DC1, this ASCII
 control character is now better known as the XON code used for software
 flow control in serial communications.  The main use is restarting
 the transmission after the communication has been stopped by the XOFF
 control code.


Since:
  8.0
See Also:
Constant Field Values




DC2
public static final byte DC2


Since:
  8.0
See Also:
DC1, 
Constant Field Values




DC3
public static final byte DC3


Since:
  8.0
See Also:
DC1, 
Constant Field Values




XOFF
public static final byte XOFF

Transmission off. @see #XON


Since:
  8.0
See Also:
Constant Field Values




DC4
public static final byte DC4


Since:
  8.0
See Also:
DC1, 
Constant Field Values




NAK
public static final byte NAK

Negative Acknowledge: A communication control character
 transmitted by a receiver as a negative response to the sender.


Since:
  8.0
See Also:
Constant Field Values




SYN
public static final byte SYN

Synchronous Idle: A communication control character used by
 a synchronous transmission system in the absence of any other
 character to provide a signal from which synchronism may be achieved
 or retained.


Since:
  8.0
See Also:
Constant Field Values




ETB
public static final byte ETB

End of Transmission Block: A communication control character
 used to indicate the end of a block of data for communication
 purposes.  ETB is used for blocking data where the block structure is
 not necessarily related to the processing format.


Since:
  8.0
See Also:
Constant Field Values




CAN
public static final byte CAN

Cancel: A control character used to indicate that the data
 with which it is sent is in error or is to be disregarded.


Since:
  8.0
See Also:
Constant Field Values




EM
public static final byte EM

End of Medium: A control character associated with the sent
 data which may be used to identify the physical end of the medium, or
 the end of the used, or wanted, portion of information recorded on a
 medium.  (The position of this character does not necessarily
 correspond to the physical end of the medium.)


Since:
  8.0
See Also:
Constant Field Values




SUB
public static final byte SUB

Substitute: A character that may be substituted for a
 character which is determined to be invalid or in error.


Since:
  8.0
See Also:
Constant Field Values




ESC
public static final byte ESC

Escape: A control character intended to provide code
 extension (supplementary characters) in general information
 interchange.  The Escape character itself is a prefix affecting the
 interpretation of a limited number of contiguously following
 characters.


Since:
  8.0
See Also:
Constant Field Values




FS
public static final byte FS

File/Group/Record/Unit Separator: These information separators may be
 used within data in optional fashion, except that their hierarchical
 relationship shall be: FS is the most inclusive, then GS, then RS,
 and US is least inclusive.  (The content and length of a File, Group,
 Record, or Unit are not specified.)


Since:
  8.0
See Also:
Constant Field Values




GS
public static final byte GS


Since:
  8.0
See Also:
FS, 
Constant Field Values




RS
public static final byte RS


Since:
  8.0
See Also:
FS, 
Constant Field Values




US
public static final byte US


Since:
  8.0
See Also:
FS, 
Constant Field Values




SP
public static final byte SP

Space: A normally non-printing graphic character used to
 separate words.  It is also a format effector which controls the
 movement of the printing position, one printing position forward.
 (Applicable also to display devices.)


Since:
  8.0
See Also:
Constant Field Values




SPACE
public static final byte SPACE

Alternate name for SP.


Since:
  8.0
See Also:
Constant Field Values




DEL
public static final byte DEL

Delete: This character is used primarily to "erase" or
 "obliterate" erroneous or unwanted characters in perforated tape.


Since:
  8.0
See Also:
Constant Field Values




MIN
@Beta
public static final int MIN

The minimum value of an ASCII character.


Since:
  9.0
See Also:
Constant Field Values




MAX
@Beta
public static final int MAX

The maximum value of an ASCII character.


Since:
  9.0
See Also:
Constant Field Values








Method Detail




toLowerCase
public static String toLowerCase(String string)

Returns a copy of the input string in which all uppercase ASCII
 characters have been converted to lowercase. All other characters are copied without
 modification.








toLowerCase
public static char toLowerCase(char c)

If the argument is an uppercase ASCII character returns the
 lowercase equivalent. Otherwise returns the argument.








toUpperCase
public static String toUpperCase(String string)

Returns a copy of the input string in which all lowercase ASCII
 characters have been converted to uppercase. All other characters are copied without
 modification.








toUpperCase
public static char toUpperCase(char c)

If the argument is a lowercase ASCII character returns the
 uppercase equivalent. Otherwise returns the argument.








isLowerCase
public static boolean isLowerCase(char c)

Indicates whether c is one of the twenty-six lowercase ASCII alphabetic characters
 between 'a' and 'z' inclusive. All others (including non-ASCII characters)
 return false.








isUpperCase
public static boolean isUpperCase(char c)

Indicates whether c is one of the twenty-six uppercase ASCII alphabetic characters
 between 'A' and 'Z' inclusive. All others (including non-ASCII characters)
 return false.

















  
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Copyright © 2010-2012. All Rights Reserved.

Field Summary
`static byte`	`ACK` Acknowledge: A communication control character transmitted by a receiver as an affirmative response to a sender.
`static byte`	`BEL` Bell ('\a'): A character for use when there is a need to call for human attention.
`static byte`	`BS` Backspace ('\b'): A format effector which controls the movement of the printing position one printing space backward on the same printing line.
`static byte`	`CAN` Cancel: A control character used to indicate that the data with which it is sent is in error or is to be disregarded.
`static byte`	`CR` Carriage Return ('\r'): A format effector which controls the movement of the printing position to the first printing position on the same printing line.
`static byte`	`DC1` Device Controls: Characters for the control of ancillary devices associated with data processing or telecommunication systems, more especially switching devices "on" or "off." (If a single "stop" control is required to interrupt or turn off ancillary devices, DC4 is the preferred assignment.)
`static byte`	`DC2`
`static byte`	`DC3`
`static byte`	`DC4`
`static byte`	`DEL` Delete: This character is used primarily to "erase" or "obliterate" erroneous or unwanted characters in perforated tape.
`static byte`	`DLE` Data Link Escape: A communication control character which will change the meaning of a limited number of contiguously following characters.
`static byte`	`EM` End of Medium: A control character associated with the sent data which may be used to identify the physical end of the medium, or the end of the used, or wanted, portion of information recorded on a medium.
`static byte`	`ENQ` Enquiry: A communication control character used in data communication systems as a request for a response from a remote station.
`static byte`	`EOT` End of Transmission: A communication control character used to indicate the conclusion of a transmission, which may have contained one or more texts and any associated headings.
`static byte`	`ESC` Escape: A control character intended to provide code extension (supplementary characters) in general information interchange.
`static byte`	`ETB` End of Transmission Block: A communication control character used to indicate the end of a block of data for communication purposes.
`static byte`	`ETX` End of Text: A communication control character used to terminate a sequence of characters started with STX and transmitted as an entity.
`static byte`	`FF` Form Feed ('\f'): A format effector which controls the movement of the printing position to the first pre-determined printing line on the next form or page.
`static byte`	`FS` File/Group/Record/Unit Separator: These information separators may be used within data in optional fashion, except that their hierarchical relationship shall be: FS is the most inclusive, then GS, then RS, and US is least inclusive.
`static byte`	`GS`
`static byte`	`HT` Horizontal Tabulation ('\t'): A format effector which controls the movement of the printing position to the next in a series of predetermined positions along the printing line.
`static byte`	`LF` Line Feed ('\n'): A format effector which controls the movement of the printing position to the next printing line.
`static int`	`MAX` The maximum value of an ASCII character.
`static int`	`MIN` The minimum value of an ASCII character.
`static byte`	`NAK` Negative Acknowledge: A communication control character transmitted by a receiver as a negative response to the sender.
`static byte`	`NL` Alternate name for `LF`.
`static byte`	`NUL` Null ('\0'): The all-zeros character which may serve to accomplish time fill and media fill.
`static byte`	`RS`
`static byte`	`SI` Shift In: A control character indicating that the code combinations which follow shall be interpreted according to the standard code table.
`static byte`	`SO` Shift Out: A control character indicating that the code combinations which follow shall be interpreted as outside of the character set of the standard code table until a Shift In character is reached.
`static byte`	`SOH` Start of Heading: A communication control character used at the beginning of a sequence of characters which constitute a machine-sensible address or routing information.
`static byte`	`SP` Space: A normally non-printing graphic character used to separate words.
`static byte`	`SPACE` Alternate name for `SP`.
`static byte`	`STX` Start of Text: A communication control character which precedes a sequence of characters that is to be treated as an entity and entirely transmitted through to the ultimate destination.
`static byte`	`SUB` Substitute: A character that may be substituted for a character which is determined to be invalid or in error.
`static byte`	`SYN` Synchronous Idle: A communication control character used by a synchronous transmission system in the absence of any other character to provide a signal from which synchronism may be achieved or retained.
`static byte`	`US`
`static byte`	`VT` Vertical Tabulation ('\v'): A format effector which controls the movement of the printing position to the next in a series of predetermined printing lines.
`static byte`	`XOFF` Transmission off.
`static byte`	`XON` Transmission on/off: Although originally defined as DC1, this ASCII control character is now better known as the XON code used for software flow control in serial communications.

Method Summary
`static boolean`	`isLowerCase(char c)` Indicates whether `c` is one of the twenty-six lowercase ASCII alphabetic characters between `'a'` and `'z'` inclusive.
`static boolean`	`isUpperCase(char c)` Indicates whether `c` is one of the twenty-six uppercase ASCII alphabetic characters between `'A'` and `'Z'` inclusive.
`static char`	`toLowerCase(char c)` If the argument is an uppercase ASCII character returns the lowercase equivalent.
`static String`	`toLowerCase(String string)` Returns a copy of the input string in which all uppercase ASCII characters have been converted to lowercase.
`static char`	`toUpperCase(char c)` If the argument is a lowercase ASCII character returns the uppercase equivalent.
`static String`	`toUpperCase(String string)` Returns a copy of the input string in which all lowercase ASCII characters have been converted to uppercase.

javadoc.com.google.common.base.Ascii.html Maven / Gradle / Ivy

com.google.common.base Class Ascii

NUL

SOH

STX

ETX

EOT

ENQ

ACK

BEL

BS

HT

LF

NL

VT

FF

CR

SO

SI

DLE

DC1

XON

DC2

DC3

XOFF

DC4

NAK

SYN

ETB

CAN

EM

SUB

ESC

FS

GS

RS

US

SP

SPACE

DEL

MIN

MAX

toLowerCase

toLowerCase

toUpperCase

toUpperCase

isLowerCase

isUpperCase

com.google.common.base
Class Ascii