FromBase (Jep with extensions API )

java.lang.Object
- com.singularsys.jep.functions.PostfixMathCommand
- - com.singularsys.jep.functions.NaryFunction
  - - com.singularsys.jep.misc.functions.FromBase

All Implemented Interfaces:

PostfixMathCommandI, java.io.Serializable
```
public class FromBase
extends NaryFunction
```
PostfixMathCommand which converts a string to a number in a given base. Instance of these classes can be specified with two different behaviours either with the base specified in the constructor or with no base specified in which case the function requires two arguments, the second of which is the base. A third form allows a prefix to be specified, this prefix must be present in the Jep expression.
For example
```
jep.addFunction("fromDec",new FromBase(10));
 jep.parse("fromDec(\"123.45\")");
 jep.addFunction("fromHex",new FromBase(16,"0x"));
 jep.parse("fromHex(\"0xff\")");
 jep.addFunction("fromBase",new FromBase());
 jep.parse("fromBase(\"0377\",8)");
```
Author:

Rich Morris Created on 02-May-2005

See Also:

Serialized Form

Field Summary
- Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand
  curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

Constructors
Constructor Description

FromBase()

FromBase(int base)

FromBase(int base, java.lang.String prefix)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`eval(java.lang.Object[] args)`	Evaluate the function
`java.lang.Object`	`fromBase(java.lang.String str, int base)`

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, checkNumberOfParameters, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

FromBase
```
public FromBase()
```

FromBase
```
public FromBase(int base)
```

FromBase

public FromBase(int base,
                java.lang.String prefix)

Method Detail
- eval
```
public java.lang.Object eval(java.lang.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
- fromBase
```
public java.lang.Object fromBase(java.lang.String str,
                                 int base)
                          throws java.lang.NumberFormatException
```
  Throws:
  
  java.lang.NumberFormatException