Package org.jfree.chart.util

Class LogFormat

java.lang.Object

java.text.Format

java.text.NumberFormat

org.jfree.chart.util.LogFormat

All Implemented Interfaces:

Serializable, Cloneable

public class LogFormat
extends NumberFormat

A number formatter for logarithmic values. This formatter does not support parsing.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.text.NumberFormat

NumberFormat.Field, NumberFormat.Style

Field Summary

Fields inherited from class java.text.NumberFormat

FRACTION_FIELD, INTEGER_FIELD

Constructor Summary

Constructors

Constructor	Description
LogFormat()	Creates a new instance using base 10.
LogFormat(double base, String baseLabel, boolean showBase)	Creates a new instance.
LogFormat(double base, String baseLabel, String powerLabel, boolean showBase)	Creates a new instance.

Method Summary

Modifier and Type	Method	Description
Object	clone()	Returns a clone of this instance.
boolean	equals(Object obj)	Tests this formatter for equality with an arbitrary object.
StringBuffer	format(double number, StringBuffer toAppendTo, FieldPosition pos)	Returns a formatted representation of the specified number.
StringBuffer	format(long number, StringBuffer toAppendTo, FieldPosition pos)	Formats the specified number as a hexadecimal string.
NumberFormat	getExponentFormat()	Returns the number format used for the exponent.
Number	parse(String source, ParsePosition parsePosition)	Parsing is not implemented, so this method always returns null.
void	setExponentFormat(NumberFormat format)	Sets the number format used for the exponent.

Methods inherited from class java.text.NumberFormat

format, format, format, getAvailableLocales, getCompactNumberInstance, getCompactNumberInstance, getCurrency, getCurrencyInstance, getCurrencyInstance, getInstance, getInstance, getIntegerInstance, getIntegerInstance, getMaximumFractionDigits, getMaximumIntegerDigits, getMinimumFractionDigits, getMinimumIntegerDigits, getNumberInstance, getNumberInstance, getPercentInstance, getPercentInstance, getRoundingMode, hashCode, isGroupingUsed, isParseIntegerOnly, parse, parseObject, setCurrency, setGroupingUsed, setMaximumFractionDigits, setMaximumIntegerDigits, setMinimumFractionDigits, setMinimumIntegerDigits, setParseIntegerOnly, setRoundingMode

Methods inherited from class java.text.Format

format, formatToCharacterIterator, parseObject

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Constructor Details

LogFormat

public LogFormat()

Creates a new instance using base 10.

LogFormat

public LogFormat(double base,
 String baseLabel,
 boolean showBase)

Creates a new instance.

Parameters:

base - the base.

baseLabel - the base label (null not permitted).

showBase - a flag that controls whether or not the base value is shown.

LogFormat

public LogFormat(double base,
 String baseLabel,
 String powerLabel,
 boolean showBase)

Creates a new instance.

Parameters:

base - the base.

baseLabel - the base label (null not permitted).

powerLabel - the power label (null not permitted).

showBase - a flag that controls whether or not the base value is shown.

Method Details

getExponentFormat

public NumberFormat getExponentFormat()

Returns the number format used for the exponent.

Returns:

The number format (never null).

setExponentFormat

public void setExponentFormat(NumberFormat format)

Sets the number format used for the exponent.

Parameters:

format - the formatter (null not permitted).

format

public StringBuffer format(double number,
 StringBuffer toAppendTo,
 FieldPosition pos)

Returns a formatted representation of the specified number.

Specified by:

format in class NumberFormat

Parameters:

number - the number.

toAppendTo - the string buffer to append to.

pos - the position.

Returns:

A string buffer containing the formatted value.

format

public StringBuffer format(long number,
 StringBuffer toAppendTo,
 FieldPosition pos)

Formats the specified number as a hexadecimal string. The decimal fraction is ignored.

Specified by:

format in class NumberFormat

Parameters:

number - the number to format.

toAppendTo - the buffer to append to (ignored here).

pos - the field position (ignored here).

Returns:

The string buffer.

parse

public Number parse(String source,
 ParsePosition parsePosition)

Parsing is not implemented, so this method always returns null.

Specified by:

parse in class NumberFormat

Parameters:

source - ignored.

parsePosition - ignored.

Returns:

Always null.

equals

public boolean equals(Object obj)

Tests this formatter for equality with an arbitrary object.

Overrides:

equals in class NumberFormat

Parameters:

obj - the object (null permitted).

Returns:

A boolean.

clone

public Object clone()

Returns a clone of this instance.

Overrides:

clone in class NumberFormat

Returns:

A clone.