Package com.singularsys.jep.misc.functions

Class RoundSF

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.NaryFunction

com.singularsys.jep.misc.functions.RoundSF

All Implemented Interfaces:

PostfixMathCommandI, Serializable

public class RoundSF
extends NaryFunction

Rounds to a specific number of significant figures. The single argument constructor rounds to 16 sf the IEEE 754 decimal64 precision. Conversion is achieved by converting to a BigDecimal with the specific precision.

See Also:

• Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor	Description
RoundSF()

Method Summary

Modifier and Type	Method	Description
BigDecimal	bigDecValue(String val, int sf)
boolean	checkNumberOfParameters(int n)	Checks the number of parameters of the function.
Object	eval(Object[] args)	Evaluate the function

Methods inherited from class com.singularsys.jep.functions.NaryFunction

run

Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString, toString

Methods inherited from class java.lang.Object

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

Constructor Details

RoundSF

public RoundSF()

Method Details

checkNumberOfParameters

public boolean checkNumberOfParameters(int n)

Description copied from class: PostfixMathCommand

Checks the number of parameters of the function. Functions which set numberOfParameter=-1 should overload this method

Specified by:

checkNumberOfParameters in interface PostfixMathCommandI

Overrides:

checkNumberOfParameters in class PostfixMathCommand

Parameters:

n - number of parameters function will be called with.

Returns:

false if an illegal number of parameters is supplied, true otherwise.

eval

public Object eval(Object[] args)
            throws EvaluationException

Description copied from class: NaryFunction

Evaluate the function

Specified by:

eval in class NaryFunction

Parameters:

args - arguments to the function

Returns:

value returned by the function

Throws:

EvaluationException - if the calculation cannot be performed

bigDecValue

public BigDecimal bigDecValue(String val,
 int sf)