cformat
Class ScanfFormat 
java.lang.Object
cformat.ScanfFormat
- public class ScanfFormat
- extends java.lang.Object
Format object for scanning input in the same way as the
C scanf methodName.
A scanf style format string is specified in the
constructor. Once instantiated, objects of this class may
be passed as arguments to the scan methods
of the ScanfReader class.
|
Method Summary |
(package private) boolean |
matchChar(char c)
Checks to see if a character matches the sequence specified by
the character set cmatch. |
void |
set(java.lang.String fmt)
Sets the contents of the object according to
the information provided in the format string. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
validTypes
private static java.lang.String validTypes
cmatch
java.lang.String cmatch
prefix
java.lang.String prefix
suffix
java.lang.String suffix
type
int type
width
int width
ScanfFormat
public ScanfFormat(java.lang.String fmt)
- Constructs a ScanfFormat class from a format string.
The structure of the format string is described
in the documentation for the set method.
set
public void set(java.lang.String fmt)
- Sets the contents of the object according to
the information provided in the format string.
The format string describes what input to expect for a
ScanfReader, and its form closely matches that for the C
scanf methodName, expect that multiple conversions
cannot be specified.
A conversion sequence is introduced by the '%' character; valid
conversion sequences are described below. Other characters may
appear in the format string. A white space character requests
a match of any amount of white space, including none. Other
characters request an exact match of themselves. The character
sequence "%%" requests a match of the '%' character.
The '%' character introducing a conversion sequence
may be followed by an unsigned decimal integer
indicating the field width, which is the maximum number of
characters used for a particular conversion. Field widths must
be greater than 0.
The optional field width is followed by one of the following
conversion characters, which specifies the primitive
type to be scanned:
- f
- floating point (double).
- d
- signed decimal integer (long or int).
- o
- unsigned octal integer (long or int), formed from the digits
[0-7].
- x
- unsigned hex integer (long or int), formed from the
characters [0-9a-fA-F].
- i
- signed integer (long or int). If the digit sequence
begins with "0x", then a hex value is scanned; if
the digit sequence begins with "0", then an octal
value is scanned; and otherwise a decimal value is scanned.
- c
- character (char).
- [
- matches any character in the sequence specified between
the '[' and a closing ']', unless the first character in the
sequence is a '^', in which case any character is matched which
does not appear in the following sequence. To include
']' in the sequence, it should be placed immediately after the
initial '[' or '[^'. The character '-' is also special; if it
appears between any two characters in the sequence, then all
characters within the numeric range specified by the two
characters are implicitly incorported into the sequence.
Consecutive '-' characters are not permitted in the sequence.
A lone '-' character may be specified by placing it at the
end of the sequence, before the closing ']'.
- s
- matches a string delimited by white space.
matchChar
boolean matchChar(char c)
- Checks to see if a character matches the sequence specified by
the character set cmatch.
JAVADOC |