net.objecthunter.exp4j.function

类 Function

java.lang.Object

net.objecthunter.exp4j.function.Function

public abstract class Function
extends Object

A class representing a Function which can be used in an expression

字段概要

字段

限定符和类型	字段和说明
protected int	numArguments

构造器概要

构造器

构造器和说明
Function(String name) Create a new Function with a given name that takes a single argument
Function(String name, int numArguments) Create a new Function with a given name and number of arguments

方法概要

限定符和类型	方法和说明
abstract double	apply(double... args) Method that does the actual calculation of the function value given the arguments
static char[]	getAllowedFunctionCharacters() 已过时。 since 0.4.5 All unicode letters are allowed to be used in function names since 0.4.3. This API Function can be safely ignored. Checks for function name validity can be done using Character.isLetter() et al.
String	getName() Get the name of the Function
int	getNumArguments() Get the number of arguments for this function
static boolean	isValidFunctionName(String name)
void	setNumArguments(int numArguments)

从类继承的方法 java.lang.Object

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

字段详细资料

numArguments

protected int numArguments

构造器详细资料

Function

public Function(String name,
                int numArguments)

Create a new Function with a given name and number of arguments

参数:

name - the name of the Function

numArguments - the number of arguments the function takes

Function

public Function(String name)

Create a new Function with a given name that takes a single argument

参数:

name - the name of the Function

方法详细资料

getName

public String getName()

Get the name of the Function

返回:

the name

getNumArguments

public int getNumArguments()

Get the number of arguments for this function

返回:

the number of arguments

setNumArguments

public void setNumArguments(int numArguments)

apply

public abstract double apply(double... args)

Method that does the actual calculation of the function value given the arguments

参数:

args - the set of arguments used for calculating the function

返回:

the result of the function evaluation

getAllowedFunctionCharacters

public static char[] getAllowedFunctionCharacters()

已过时。 since 0.4.5 All unicode letters are allowed to be used in function names since 0.4.3. This API Function can be safely ignored. Checks for function name validity can be done using Character.isLetter() et al.

Get the set of characters which are allowed for use in Function names.

返回:

the set of characters allowed

isValidFunctionName

public static boolean isValidFunctionName(String name)