public interface NumberExpression extends ObservableNumberValue
NumberExpression
is a
ObservableNumberValue
plus additional convenience
methods to generate bindings in a fluent style.
This API allows to mix types when defining arithmetic operations. The type of the result is defined by the same rules as in the Java Language.
To be able to deal with an unspecified return type, two interfaces
NumberExpression
and its counterpart
NumberBinding
were introduced. That means if the
return type is specified as NumberBinding
, the method will either
return a DoubleBinding
,
FloatBinding
,
LongBinding
or
IntegerBinding
, depending on the types of the
operands.
The API tries to do its best in determining the correct return type, e.g.
combining a ObservableNumberValue
with a primitive
double will always result in a DoubleBinding
. In
cases where the return type is not known by the API, it is the responsibility
of the developer to call the correct getter (ObservableNumberValue.intValue()
etc.). If
the internal representation does not match the type of the getter, a standard
cast is done.
Modifier and Type  Method and Description 

NumberBinding 
add(double other)
Creates a new
NumberBinding that calculates
the sum of this NumberExpression and a constant value. 
NumberBinding 
add(float other)
Creates a new
NumberBinding that calculates
the sum of this NumberExpression and a constant value. 
NumberBinding 
add(int other)
Creates a new
NumberBinding that calculates
the sum of this NumberExpression and a constant value. 
NumberBinding 
add(long other)
Creates a new
NumberBinding that calculates
the sum of this NumberExpression and a constant value. 
NumberBinding 
add(ObservableNumberValue other)
Creates a new
NumberBinding that calculates
the sum of this NumberExpression and another
ObservableNumberValue . 
StringBinding 
asString()

StringBinding 
asString(Locale locale,
String format)

StringBinding 
asString(String format)

NumberBinding 
divide(double other)
Creates a new
NumberBinding that calculates
the division of this NumberExpression and a constant value. 
NumberBinding 
divide(float other)
Creates a new
NumberBinding that calculates
the division of this NumberExpression and a constant value. 
NumberBinding 
divide(int other)
Creates a new
NumberBinding that calculates
the division of this NumberExpression and a constant value. 
NumberBinding 
divide(long other)
Creates a new
NumberBinding that calculates
the division of this NumberExpression and a constant value. 
NumberBinding 
divide(ObservableNumberValue other)
Creates a new
NumberBinding that calculates
the division of this NumberExpression and another
ObservableNumberValue . 
BooleanBinding 
greaterThan(double other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than a constant value. 
BooleanBinding 
greaterThan(float other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than a constant value. 
BooleanBinding 
greaterThan(int other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than a constant value. 
BooleanBinding 
greaterThan(long other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than a constant value. 
BooleanBinding 
greaterThan(ObservableNumberValue other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than another
ObservableNumberValue . 
BooleanBinding 
greaterThanOrEqualTo(double other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than or equal to a constant
value. 
BooleanBinding 
greaterThanOrEqualTo(float other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than or equal to a constant
value. 
BooleanBinding 
greaterThanOrEqualTo(int other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than or equal to a constant
value. 
BooleanBinding 
greaterThanOrEqualTo(long other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than or equal to a constant
value. 
BooleanBinding 
greaterThanOrEqualTo(ObservableNumberValue other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is greater than or equal to another
ObservableNumberValue . 
BooleanBinding 
isEqualTo(double other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this NumberExpression is equal to a constant value (with a
tolerance). 
BooleanBinding 
isEqualTo(float other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this NumberExpression is equal to a constant value (with a
tolerance). 
BooleanBinding 
isEqualTo(int other)

BooleanBinding 
isEqualTo(int other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this NumberExpression is equal to a constant value (with a
tolerance). 
BooleanBinding 
isEqualTo(long other)

BooleanBinding 
isEqualTo(long other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this NumberExpression is equal to a constant value (with a
tolerance). 
BooleanBinding 
isEqualTo(ObservableNumberValue other)

BooleanBinding 
isEqualTo(ObservableNumberValue other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this and another ObservableNumberValue are
equal (with a tolerance). 
BooleanBinding 
isNotEqualTo(double other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this NumberExpression is not equal to a constant value (with a
tolerance). 
BooleanBinding 
isNotEqualTo(float other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this NumberExpression is not equal to a constant value (with a
tolerance). 
BooleanBinding 
isNotEqualTo(int other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is not equal to a constant value. 
BooleanBinding 
isNotEqualTo(int other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this NumberExpression is not equal to a constant value (with a
tolerance). 
BooleanBinding 
isNotEqualTo(long other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is not equal to a constant value. 
BooleanBinding 
isNotEqualTo(long other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this NumberExpression is not equal to a constant value (with a
tolerance). 
BooleanBinding 
isNotEqualTo(ObservableNumberValue other)
Creates a new
BooleanBinding that holds true
if this and another ObservableNumberValue are
not equal. 
BooleanBinding 
isNotEqualTo(ObservableNumberValue other,
double epsilon)
Creates a new
BooleanBinding that holds true
if this and another ObservableNumberValue are
not equal (with a tolerance). 
BooleanBinding 
lessThan(double other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is lesser than a constant value. 
BooleanBinding 
lessThan(float other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is lesser than a constant value. 
BooleanBinding 
lessThan(int other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is lesser than a constant value. 
BooleanBinding 
lessThan(long other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is lesser than a constant value. 
BooleanBinding 
lessThan(ObservableNumberValue other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is lesser than another
ObservableNumberValue . 
BooleanBinding 
lessThanOrEqualTo(double other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is less than or equal to a constant
value. 
BooleanBinding 
lessThanOrEqualTo(float other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is less than or equal to a constant
value. 
BooleanBinding 
lessThanOrEqualTo(int other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is less than or equal to a constant
value. 
BooleanBinding 
lessThanOrEqualTo(long other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is less than or equal to a constant
value. 
BooleanBinding 
lessThanOrEqualTo(ObservableNumberValue other)
Creates a new
BooleanBinding that holds true
if this NumberExpression is less than or equal to another
ObservableNumberValue . 
NumberBinding 
multiply(double other)
Creates a new
NumberBinding that calculates
the product of this NumberExpression and a constant value. 
NumberBinding 
multiply(float other)
Creates a new
NumberBinding that calculates
the product of this NumberExpression and a constant value. 
NumberBinding 
multiply(int other)
Creates a new
NumberBinding that calculates
the product of this NumberExpression and a constant value. 
NumberBinding 
multiply(long other)
Creates a new
NumberBinding that calculates
the product of this NumberExpression and a constant value. 
NumberBinding 
multiply(ObservableNumberValue other)
Creates a new
NumberBinding that calculates
the product of this NumberExpression and another
ObservableNumberValue . 
NumberBinding 
negate()
Creates a new
NumberBinding that calculates
the negation of NumberExpression . 
NumberBinding 
subtract(double other)
Creates a new
NumberBinding that calculates
the difference of this NumberExpression and a constant value. 
NumberBinding 
subtract(float other)
Creates a new
NumberBinding that calculates
the difference of this NumberExpression and a constant value. 
NumberBinding 
subtract(int other)
Creates a new
NumberBinding that calculates
the difference of this NumberExpression and a constant value. 
NumberBinding 
subtract(long other)
Creates a new
NumberBinding that calculates
the difference of this NumberExpression and a constant value. 
NumberBinding 
subtract(ObservableNumberValue other)
Creates a new
NumberBinding that calculates
the difference of this NumberExpression and another
ObservableNumberValue . 
doubleValue, floatValue, intValue, longValue
addListener, getValue, removeListener
addListener, removeListener
NumberBinding negate()
NumberBinding
that calculates
the negation of NumberExpression
.NumberBinding
NumberBinding add(ObservableNumberValue other)
NumberBinding
that calculates
the sum of this NumberExpression
and another
ObservableNumberValue
.other
 the second ObservableNumberValue
NumberBinding
NullPointerException
 if the other ObservableNumberValue
is null
NumberBinding add(double other)
NumberBinding
that calculates
the sum of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding add(float other)
NumberBinding
that calculates
the sum of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding add(long other)
NumberBinding
that calculates
the sum of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding add(int other)
NumberBinding
that calculates
the sum of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding subtract(ObservableNumberValue other)
NumberBinding
that calculates
the difference of this NumberExpression
and another
ObservableNumberValue
.other
 the second ObservableNumberValue
NumberBinding
NullPointerException
 if the other ObservableNumberValue
is null
NumberBinding subtract(double other)
NumberBinding
that calculates
the difference of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding subtract(float other)
NumberBinding
that calculates
the difference of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding subtract(long other)
NumberBinding
that calculates
the difference of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding subtract(int other)
NumberBinding
that calculates
the difference of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding multiply(ObservableNumberValue other)
NumberBinding
that calculates
the product of this NumberExpression
and another
ObservableNumberValue
.other
 the second ObservableNumberValue
NumberBinding
NullPointerException
 if the other ObservableNumberValue
is null
NumberBinding multiply(double other)
NumberBinding
that calculates
the product of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding multiply(float other)
NumberBinding
that calculates
the product of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding multiply(long other)
NumberBinding
that calculates
the product of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding multiply(int other)
NumberBinding
that calculates
the product of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding divide(ObservableNumberValue other)
NumberBinding
that calculates
the division of this NumberExpression
and another
ObservableNumberValue
.other
 the second ObservableNumberValue
NumberBinding
NullPointerException
 if the other ObservableNumberValue
is null
NumberBinding divide(double other)
NumberBinding
that calculates
the division of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding divide(float other)
NumberBinding
that calculates
the division of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding divide(long other)
NumberBinding
that calculates
the division of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
NumberBinding divide(int other)
NumberBinding
that calculates
the division of this NumberExpression
and a constant value.other
 the constant valueNumberBinding
BooleanBinding isEqualTo(ObservableNumberValue other)
BooleanBinding
that holds true
if this and another ObservableNumberValue
are
equal.
When comparing floatingpoint numbers it is recommended to use the
isEqualTo()
method that
allows a small tolerance.
other
 the second ObservableNumberValue
BooleanBinding
NullPointerException
 if the other ObservableNumberValue
is null
BooleanBinding isEqualTo(ObservableNumberValue other, double epsilon)
BooleanBinding
that holds true
if this and another ObservableNumberValue
are
equal (with a tolerance).
Two operands a
and b
are considered equal if
Math.abs(ab) <= epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers because of roundingerrors.
other
 the second ObservableNumberValue
epsilon
 the toleranceBooleanBinding
NullPointerException
 if the other ObservableNumberValue
is null
BooleanBinding isEqualTo(double other, double epsilon)
BooleanBinding
that holds true
if this NumberExpression
is equal to a constant value (with a
tolerance).
Two operands a
and b
are considered equal if
Math.abs(ab) <= epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers because of roundingerrors.
other
 the constant valueepsilon
 the permitted toleranceBooleanBinding
BooleanBinding isEqualTo(float other, double epsilon)
BooleanBinding
that holds true
if this NumberExpression
is equal to a constant value (with a
tolerance).
Two operands a
and b
are considered equal if
Math.abs(ab) <= epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers because of roundingerrors.
other
 the constant valueepsilon
 the permitted toleranceBooleanBinding
BooleanBinding isEqualTo(long other)
BooleanBinding
that holds true
if this NumberExpression
is equal to a constant value.
When comparing floatingpoint numbers it is recommended to use the
isEqualTo()
method that allows a small
tolerance.
other
 the constant valueBooleanBinding
BooleanBinding isEqualTo(long other, double epsilon)
BooleanBinding
that holds true
if this NumberExpression
is equal to a constant value (with a
tolerance).
Two operands a
and b
are considered equal if
Math.abs(ab) <= epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers because of roundingerrors.
other
 the constant valueepsilon
 the permitted toleranceBooleanBinding
BooleanBinding isEqualTo(int other)
BooleanBinding
that holds true
if this NumberExpression
is equal to a constant value.
When comparing floatingpoint numbers it is recommended to use the
isEqualTo()
method that allows a small
tolerance.
other
 the constant valueBooleanBinding
BooleanBinding isEqualTo(int other, double epsilon)
BooleanBinding
that holds true
if this NumberExpression
is equal to a constant value (with a
tolerance).
Two operands a
and b
are considered equal if
Math.abs(ab) <= epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers.
other
 the constant valueepsilon
 the permitted toleranceBooleanBinding
BooleanBinding isNotEqualTo(ObservableNumberValue other)
BooleanBinding
that holds true
if this and another ObservableNumberValue
are
not equal.
When comparing floatingpoint numbers it is recommended to use the
isNotEqualTo()
method that allows a small tolerance.
other
 the second ObservableNumberValue
BooleanBinding
NullPointerException
 if the other ObservableNumberValue
is null
BooleanBinding isNotEqualTo(ObservableNumberValue other, double epsilon)
BooleanBinding
that holds true
if this and another ObservableNumberValue
are
not equal (with a tolerance).
Two operands a
and b
are considered not equal if
Math.abs(ab) > epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers because of roundingerrors.
other
 the second ObservableNumberValue
epsilon
 the permitted toleranceBooleanBinding
NullPointerException
 if the other ObservableNumberValue
is null
BooleanBinding isNotEqualTo(double other, double epsilon)
BooleanBinding
that holds true
if this NumberExpression
is not equal to a constant value (with a
tolerance).
Two operands a
and b
are considered not equal if
Math.abs(ab) > epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers.
other
 the constant valueepsilon
 the permitted toleranceBooleanBinding
BooleanBinding isNotEqualTo(float other, double epsilon)
BooleanBinding
that holds true
if this NumberExpression
is not equal to a constant value (with a
tolerance).
Two operands a
and b
are considered not equal if
Math.abs(ab) > epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers.
other
 the constant valueepsilon
 the permitted toleranceBooleanBinding
BooleanBinding isNotEqualTo(long other)
BooleanBinding
that holds true
if this NumberExpression
is not equal to a constant value.
When comparing floatingpoint numbers it is recommended to use the
isNotEqualTo()
method that allows a
small tolerance.
other
 the constant valueBooleanBinding
BooleanBinding isNotEqualTo(long other, double epsilon)
BooleanBinding
that holds true
if this NumberExpression
is not equal to a constant value (with a
tolerance).
Two operands a
and b
are considered not equal if
Math.abs(ab) > epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers.
other
 the constant valueepsilon
 the permitted toleranceBooleanBinding
BooleanBinding isNotEqualTo(int other)
BooleanBinding
that holds true
if this NumberExpression
is not equal to a constant value.
When comparing floatingpoint numbers it is recommended to use the
isNotEqualTo()
method that allows a
small tolerance.
other
 the constant valueBooleanBinding
BooleanBinding isNotEqualTo(int other, double epsilon)
BooleanBinding
that holds true
if this NumberExpression
is not equal to a constant value (with a
tolerance).
Two operands a
and b
are considered not equal if
Math.abs(ab) > epsilon
.
Allowing a small tolerance is recommended when comparing floatingpoint numbers.
other
 the constant valueepsilon
 the permitted toleranceBooleanBinding
BooleanBinding greaterThan(ObservableNumberValue other)
BooleanBinding
that holds true
if this NumberExpression
is greater than another
ObservableNumberValue
.other
 the second ObservableNumberValue
BooleanBinding
NullPointerException
 if the other ObservableNumberValue
is null
BooleanBinding greaterThan(double other)
BooleanBinding
that holds true
if this NumberExpression
is greater than a constant value.other
 the constant valueBooleanBinding
BooleanBinding greaterThan(float other)
BooleanBinding
that holds true
if this NumberExpression
is greater than a constant value.other
 the constant valueBooleanBinding
BooleanBinding greaterThan(long other)
BooleanBinding
that holds true
if this NumberExpression
is greater than a constant value.other
 the constant valueBooleanBinding
BooleanBinding greaterThan(int other)
BooleanBinding
that holds true
if this NumberExpression
is greater than a constant value.other
 the constant valueBooleanBinding
BooleanBinding lessThan(ObservableNumberValue other)
BooleanBinding
that holds true
if this NumberExpression
is lesser than another
ObservableNumberValue
.other
 the second ObservableNumberValue
BooleanBinding
NullPointerException
 if the other ObservableNumberValue
is null
BooleanBinding lessThan(double other)
BooleanBinding
that holds true
if this NumberExpression
is lesser than a constant value.other
 the constant valueBooleanBinding
BooleanBinding lessThan(float other)
BooleanBinding
that holds true
if this NumberExpression
is lesser than a constant value.other
 the constant valueBooleanBinding
BooleanBinding lessThan(long other)
BooleanBinding
that holds true
if this NumberExpression
is lesser than a constant value.other
 the constant valueBooleanBinding
BooleanBinding lessThan(int other)
BooleanBinding
that holds true
if this NumberExpression
is lesser than a constant value.other
 the constant valueBooleanBinding
BooleanBinding greaterThanOrEqualTo(ObservableNumberValue other)
BooleanBinding
that holds true
if this NumberExpression
is greater than or equal to another
ObservableNumberValue
.other
 the second ObservableNumberValue
BooleanBinding
NullPointerException
 if the other ObservableNumberValue
is null
BooleanBinding greaterThanOrEqualTo(double other)
BooleanBinding
that holds true
if this NumberExpression
is greater than or equal to a constant
value.other
 the constant valueBooleanBinding
BooleanBinding greaterThanOrEqualTo(float other)
BooleanBinding
that holds true
if this NumberExpression
is greater than or equal to a constant
value.other
 the constant valueBooleanBinding
BooleanBinding greaterThanOrEqualTo(long other)
BooleanBinding
that holds true
if this NumberExpression
is greater than or equal to a constant
value.other
 the constant valueBooleanBinding
BooleanBinding greaterThanOrEqualTo(int other)
BooleanBinding
that holds true
if this NumberExpression
is greater than or equal to a constant
value.other
 the constant valueBooleanBinding
BooleanBinding lessThanOrEqualTo(ObservableNumberValue other)
BooleanBinding
that holds true
if this NumberExpression
is less than or equal to another
ObservableNumberValue
.other
 the second ObservableNumberValue
BooleanBinding
NullPointerException
 if the other ObservableNumberValue
is null
BooleanBinding lessThanOrEqualTo(double other)
BooleanBinding
that holds true
if this NumberExpression
is less than or equal to a constant
value.other
 the constant valueBooleanBinding
BooleanBinding lessThanOrEqualTo(float other)
BooleanBinding
that holds true
if this NumberExpression
is less than or equal to a constant
value.other
 the constant valueBooleanBinding
BooleanBinding lessThanOrEqualTo(long other)
BooleanBinding
that holds true
if this NumberExpression
is less than or equal to a constant
value.other
 the constant valueBooleanBinding
BooleanBinding lessThanOrEqualTo(int other)
BooleanBinding
that holds true
if this NumberExpression
is less than or equal to a constant
value.other
 the constant valueBooleanBinding
StringBinding asString()
StringBinding
that holds the value
of the NumberExpression
turned into a String
. If the
value of this NumberExpression
changes, the value of the
StringBinding
will be updated automatically.
The conversion is done without any formatting applied.
StringBinding
StringBinding asString(String format)
StringBinding
that holds the value
of the NumberExpression
turned into a String
. If the
value of this NumberExpression
changes, the value of the
StringBinding
will be updated automatically.
The result is formatted according to the formatting String
. See
java.util.Formatter
for formatting rules.
format
 the formatting String
StringBinding
StringBinding asString(Locale locale, String format)
StringBinding
that holds the value
of the NumberExpression
turned into a String
. If the
value of this NumberExpression
changes, the value of the
StringBinding
will be updated automatically.
The result is formatted according to the formatting String
and
the passed in Locale
. See java.util.Formatter
for
formatting rules. See java.util.Locale
for details on
Locale
.
format
 the formatting String
StringBinding
Submit a bug or feature
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developertargeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
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