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SSJ: PrintfFormat Class Reference

This class acts like a StringBuffer which defines new types of append methods. More...

This class acts like a StringBuffer which defines new types of append methods.

It defines certain functionalities of the ANSI C printf function that also can be accessed through static methods. The information given here is strongly inspired from the man page of the C printf function.

Most methods of this class format numbers for the English US locale only. One can use the Java class Formatter for performing locale-independent formatting.

Constructs a new buffer object with an initial capacity of length.

Parameters

length initial length of the buffer

Constructs a new buffer object containing the initial string str.

Parameters

str initial contents of the buffer

Appends str to the buffer.

Parameters

str string to append to the buffer

Returns

this object

Uses the s(int,String) static method to append str to the buffer.

A minimum of fieldwidth characters will be used.

Parameters

fieldwidth minimum number of characters that will be added to the buffer str string to append to the buffer

Returns

this object

Appends x to the buffer.

Parameters

x value being added to the buffer

Returns

this object

Uses the f(int,double) static method to append x to the buffer.

A minimum of fieldwidth characters will be used.

Parameters

fieldwidth minimum length of the converted string to be appended x value to be appended to the buffer

Returns

this object

Uses the f(int,int,double) static method to append x to the buffer.

A minimum of fieldwidth characters will be used with the given precision.

Parameters

fieldwidth minimum length of the converted string to be appended precision number of digits after the decimal point of the converted value x value to be appended to the buffer

Returns

this object

Appends x to the buffer.

Parameters

x value to be appended to the buffer

Returns

this object

Uses the d(int,long) static method to append x to the buffer.

A minimum of fieldwidth characters will be used.

Parameters

fieldwidth minimum length of the converted string to be appended x value to be appended to the buffer

Returns

this object

Appends x to the buffer.

Parameters

x value to be appended to the buffer

Returns

this object

Uses the d(int,long) static method to append x to the buffer.

A minimum of fieldwidth characters will be used.

Parameters

fieldwidth minimum length of the converted string to be appended x value to be appended to the buffer

Returns

this object

Uses the format(int,int,int,double) static method with the same four arguments to append x to the buffer.

Parameters

fieldwidth minimum length of the converted string to be appended accuracy number of digits after the decimal point precision number of significant digits x value to be appended to the buffer

Returns

this object

Appends a single character to the buffer.

Parameters

c character to be appended to the buffer

Returns

this object

Same as d(0, 1, x).

Parameters

Returns

the same string, padded with spaces or zeros if appropriate

Same as d(fieldwidth, 1, x).

Parameters

fieldwidth minimum length of the returned string x the string to process

Returns

the same string, padded with spaces or zeros if appropriate

Formats the long integer x into a string like d in the C printf function.

It converts its argument to decimal notation, precision gives the minimum number of digits that must appear; if the converted value requires fewer digits, it is padded on the left with zeros. When zero is printed with an explicit precision 0, the output is empty.

Parameters

fieldwidth minimum length of the returned string precision number of digits in the returned string x the string to process

Returns

the same string, padded with spaces or zeros if appropriate

Same as E(0, 6, x).

Parameters

x the value to be converted to string

Returns

the converted value as a string

Same as E(fieldwidth, 6, x).

Parameters

fieldwidth minimum length of the returned string x the value to be converted to string

Returns

the converted value as a string

Formats a double-precision number x like E in C printf.

The double argument is rounded and converted in the style [-]d.dddE+-dd where there is one digit before the decimal-point character and the number of digits after it is equal to the precision; if the precision is 0, no decimal-point character appears. The exponent always contains at least two digits; if the value is zero, the exponent is 00.

Parameters

fieldwidth minimum length of the returned string precision number of digits after the decimal point x the value to be converted to string

Returns

the converted value as a string

Same as e(0, 6, x).

Parameters

x the value to be converted to string

Returns

the converted value as a string

Same as e(fieldwidth, 6, x).

Parameters

fieldwidth minimum length of the returned string x the value to be converted to string

Returns

the converted value as a string

The same as E, except that ‘e’ is used as the exponent character instead of ‘E’.

Parameters

fieldwidth minimum length of the returned string precision number of digits after the decimal point x the value to be converted to string

Returns

the converted value as a string

Same as f(0, 6, x).

Parameters

x the value to be converted to string

Returns

the converted value as a string

Same as f(fieldwidth, 6, x).

Parameters

fieldwidth minimum length of the returned string x the value to be converted to string

Returns

the converted value as a string

Formats the double-precision x into a string like f in C printf.

The argument is rounded and converted to decimal notation in the style [-]ddd.ddd, where the number of digits after the decimal-point character is equal to the precision specification. If the precision is explicitly 0, no decimal-point character appears. If a decimal point appears, at least one digit appears before it.

Parameters

fieldwidth minimum length of the returned string precision number of digits after the decimal point x the value to be converted to string

Returns

the converted value as a string

Same as d(0, 1, x).

Parameters

x the value to be processed

Returns

the string resulting from the conversion

Converts a long integer to a String with a minimum length of fieldwidth, the result is right-padded with spaces if necessary but it is not truncated.

If only one argument is specified, a fieldwidth of 0 is assumed.

Parameters

fieldwidth minimum length of the returned string x the value to be processed

Returns

the string resulting from the conversion

Returns a String containing x.

Uses a total of at least fieldwidth positions (including the sign and point when they appear), accuracy digits after the decimal point and at least precision significant digits. accuracy and precision must be strictly smaller than fieldwidth. The number is rounded if necessary. If there is not enough space to format the number in decimal notation with at least precision significant digits (accuracy or fieldwidth is too small), it will be converted to scientific notation with at least precision significant digits. In that case, fieldwidth is increased if necessary.

Parameters

fieldwidth minimum length of the returned string accuracy number of digits after the decimal point precision number of significant digits x the value to be processed

Returns

the converted value as a string

This method is equivalent to format(int,int,int,double), except it formats the given value for the locale locale.

Parameters

locale the locale being used for formatting fieldwidth minimum length of the returned string accuracy number of digits after the decimal point precision number of significant digits x the value to be processed

Returns

the converted value as a string

Same as formatBase(0, b, x).

Parameters

b the base used for conversion x the value to be processed

Returns

a string representing x in base b

Converts the integer x to a String representation in base b.

Restrictions: \(2\le\) b \(\le10\).

Parameters

fieldwidth minimum length of the returned string b the base used for conversion x the value to be processed

Returns

a string representing x in base b

Converts \(x\) to a String representation in base \(b\) using formatting similar to the \(f\) methods.

Uses a total of at least fieldwidth positions (including the sign and point when they appear) and accuracy digits after the decimal point. If fieldwidth is negative, the number is printed left-justified, otherwise right-justified. Restrictions: \(2 \le b \le10\) and \(|x| < 2^{63}\).

Parameters

fieldwidth minimum length of the returned string accuracy number of digits after the decimal point b base x the value to be processed

Returns

the converted value as a string

Stores a string containing x into res[0], and a string containing error into res[1], both strings being formatted with the same notation.

Uses a total of at least fieldwidth positions (including the sign and point when they appear) for x, fieldwidtherr positions for error, accuracy digits after the decimal point and at least precision significant digits. accuracy and precision must be strictly smaller than fieldwidth. The numbers are rounded if necessary. If there is not enough space to format x in decimal notation with at least precision significant digits (accuracy or fieldwidth are too small), it will be converted to scientific notation with at least precision significant digits. In that case, fieldwidth is increased if necessary, and the error is also formatted in scientific notation.

Parameters

fieldwidth minimum length of the value string fieldwidtherr minimum length of the error string accuracy number of digits after the decimal point for the value and error precision number of significant digits for the value x the value to be processed error the error on the value to be processed res an array that will be filled with the formatted value and formatted error

Stores a string containing x into res[0], and a string containing error into res[1], both strings being formatted with the same notation.

This calls #formatWithError(int,int,int,int,double,double,String[]) with the minimal accuracy for which the formatted string for error is non-zero. If error is 0, the accuracy is 0. If this minimal accuracy causes the strings to be formatted using scientific notation, this method increases the accuracy until the decimal notation can be used.

Parameters

fieldwidth minimum length of the value string fieldwidtherr minimum length of the error string precision number of significant digits for the value x the value to be processed error the error on the value to be processed res an array that will be filled with the formatted value and formatted error

This method is equivalent to #formatWithError(int,int,int,double,double,String[]), except that it formats the given value and error for the locale locale.

Parameters

locale the locale being used fieldwidth minimum length of the value string fieldwidtherr minimum length of the error string accuracy number of digits after the decimal point for the value and error precision number of significant digits for the value x the value to be processed error the error on the value to be processed res an array that will be filled with the formatted value and formatted error

This method is equivalent to #formatWithError(int,int,int,double,double,String[]), except that it formats the given value and error for the locale locale.

Parameters

locale the locale being used fieldwidth minimum length of the value string fieldwidtherr minimum length of the error string precision number of significant digits for the value x the value to be processed error the error on the value to be processed res an array that will be filled with the formatted value and formatted error

Same as G(0, 6, x).

Parameters

x the value to be converted to string

Returns

the converted value as a string

Same as G(fieldwidth, 6, x).

Parameters

fieldwidth minimum length of the returned string x the value to be converted to string

Returns

the converted value as a string

Formats the double-precision x into a string like G in C printf.

The argument is converted in style f or E. precision specifies the number of significant digits. If it is 0, it is treated as 1. Style E is used if the exponent from its conversion is less than \(-4\) or greater than or equal to precision. Trailing zeros are removed from the fractional part of the result; a decimal point appears only if it is followed by at least one digit.

Parameters

fieldwidth minimum length of the returned string precision number of significant digits x the value to be converted to string

Returns

the converted value as a string

Same as g(0, 6, x).

Parameters

x the value to be converted to string

Returns

the converted value as a string

Same as g(fieldwidth, 6, x).

Parameters

fieldwidth minimum length of the returned string x the value to be converted to string

Returns

the converted value as a string

The same as G, except that ‘e’ is used in the scientific notation.

Parameters

fieldwidth minimum length of the returned string precision number of significant digits x the value to be converted to string

Returns

the converted value as a string

Returns the StringBuffer associated with that object.

Returns

the internal StringBuffer object

Same as s(0, str).

If the string str is null, it returns the string "null".

Parameters

str the string to process

Returns

the same string

Formats the string str like the s in the C printf function.

The fieldwidth argument gives the minimum length of the resulting string. If str is shorter than fieldwidth, it is left-padded with spaces. If fieldwidth is negative, the string is right-padded with spaces if necessary. The String will never be truncated. If str is null, it calls s(fieldwidth, "null"). The fieldwidth argument has the same effect for the other methods in this class.

Parameters

fieldwidth minimum length of the returned string str the string to process

Returns

the same string padded with spaces if necessary

Converts the buffer into a String.

Returns

the String conversion of the internal buffer

=

System.getProperty("line.separator")

End-of-line symbol or line separator.

Same as NEWLINE.

=

System.getProperty("line.separator")

End-of-line symbol or line separator.

It is "\\n" for Unix/Linux, "\\r\\n" for MS-DOS/MS-Windows, and "\\r" for Apple OSX.

The documentation for this class was generated from the following file:

• PrintfFormat.java

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