Package rma.util

Class CJFormat

java.lang.Object

rma.util.CJFormat

public class CJFormat
extends Object

Constructor Summary

Constructors

Constructor	Description
CJFormat(String s)	Formats the number following printf conventions.

Method Summary

Modifier and Type	Method	Description
static double	atof(String s)	Converts a string of digits to an double
static int	atoi(String s)	Converts a string of digits (decimal, octal or hex) to an integer
static long	atol(String s)	Converts a string of digits (decimal, octal or hex) to a long integer
String	form(boolean b)	Formats a boolean into a larger string (like sprintf in C)
String	form(char c)	Formats a character into a string (like sprintf in C)
String	form(double x)	Formats a double into a string (like sprintf in C)
String	form(long x)	Formats a long integer into a string (like sprintf in C)
String	form(String s)	Formats a string into a larger string (like sprintf in C)
static void	main(String[] a)	a test stub for the format class
static void	print(PrintStream s, String fmt, char x)	prints a formatted number following printf conventions
static void	print(PrintStream s, String fmt, double x)	prints a formatted number following printf conventions
static void	print(PrintStream s, String fmt, long x)	prints a formatted number following printf conventions
static void	print(PrintStream s, String fmt, String x)	prints a formatted number following printf conventions

Methods inherited from class java.lang.Object

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

Constructor Details

CJFormat

public CJFormat(String s)

Formats the number following printf conventions. Main limitation: Can only handle one format parameter at a time Use multiple Format objects to format more than one number

Parameters:

s - the format string following printf conventions The string has a prefix, a format code and a suffix. The prefix and suffix become part of the formatted output. The format code directs the formatting of the (single) parameter to be formatted. The code has the following structure

• a % (required)
• a modifier (optional)

  +

  forces display of + for positive numbers

  0

  show leading zeroes

  -

  align left in the field

  space

  prepend a space in front of positive numbers

  #

  use "alternate" format. Add 0 or 0x for octal or hexadecimal numbers. Don't suppress trailing zeroes in general floating point format.

• an integer denoting field width (optional)
• a period followed by an integer denoting precision (optional)
• a format descriptor (required)

  f

  floating point number in fixed format

  e, E

  floating point number in exponential notation (scientific format). The E format results in an uppercase E for the exponent (1.14130E+003), the e format in a lowercase e.

  g, G

  floating point number in general format (fixed format for small numbers, exponential format for large numbers). Trailing zeroes are suppressed. The G format results in an uppercase E for the exponent (if any), the g format in a lowercase e.

  d, i

  integer in decimal

  x

  integer in hexadecimal

  o

  integer in octal

  s

  string

  c

  character

Throws:

IllegalArgumentException - if bad format

Method Details

print

public static void print(PrintStream s,
 String fmt,
 double x)

prints a formatted number following printf conventions

Parameters:

s - a PrintStream

fmt - the format string

x - the double to print

print

public static void print(PrintStream s,
 String fmt,
 long x)

prints a formatted number following printf conventions

Parameters:

s - a PrintStream

fmt - the format string

x - the long to print

print

public static void print(PrintStream s,
 String fmt,
 char x)

prints a formatted number following printf conventions

Parameters:

s - a PrintStream

fmt - the format string

x - the character to

print

public static void print(PrintStream s,
 String fmt,
 String x)

prints a formatted number following printf conventions

Parameters:

s - a PrintStream, fmt the format string

x - a string that represents the digits to print

atoi

public static int atoi(String s)

Converts a string of digits (decimal, octal or hex) to an integer

Parameters:

s - a string

Returns:

the numeric value of the prefix of s representing a base 10 integer

atol

public static long atol(String s)

Converts a string of digits (decimal, octal or hex) to a long integer

Parameters:

s - a string

Returns:

the numeric value of the prefix of s representing a base 10 integer

atof

public static double atof(String s)

Converts a string of digits to an double

Parameters:

s - a string

form

public String form(double x)

Formats a double into a string (like sprintf in C)

Parameters:

x - the number to format

Returns:

the formatted string

Throws:

IllegalArgumentException - if bad argument

form

public String form(long x)

Formats a long integer into a string (like sprintf in C)

Parameters:

x - the number to format

Returns:

the formatted string

form

public String form(char c)

Formats a character into a string (like sprintf in C)

Parameters:

c - the value to format

Returns:

the formatted string

form

public String form(String s)

Formats a string into a larger string (like sprintf in C)

Parameters:

s - the value to format

Returns:

the formatted string

form

public String form(boolean b)

Formats a boolean into a larger string (like sprintf in C)

Parameters:

b - the value to format

Returns:

the formatted string

main

public static void main(String[] a)

a test stub for the format class