gpsys.primitives
Class XDouble

java.lang.Object
  |
  +--gpsys.Primitive
        |
        +--gpsys.Terminal
              |
              +--gpsys.primitives.XDouble

public class XDouble

extends Terminal

	DOUBLE XDouble
 

XDouble is a Terminal representing a variable of Type DOUBLE.

Version:

$Revision: 1.1 $, $Date: 2000/07/05 16:24:33 $

Author:

Adil Qureshi

Department of Computer Science,

University College London,

Gower St,

London WC1E 6BT,

UK.

See Also:

Type, Primitive, Terminal, Serialized Form

Field Summary

(package private) double

dvalue Holds the value of the variable.

Fields inherited from class gpsys.Primitive

type

Constructor Summary

XDouble()
Construct a new variable.

Method Summary

double	evaluateDouble(Individual i) Evaluates the variable, which returns its value.
Primitive	instance() Creates a copy of this Terminal.
void	set(double value) Sets the variable to the specified value.
java.lang.String	toString() Creates a String representing this Terminal.

Methods inherited from class gpsys.Terminal

evaluateBoolean, evaluateByte, evaluateChar, evaluateFloat, evaluateInt, evaluateLong, evaluateObject, evaluateShort

Methods inherited from class java.lang.Object

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

Field Detail

dvalue

double dvalue

Holds the value of the variable.

Constructor Detail

XDouble

public XDouble()

Construct a new variable.

Method Detail

evaluateDouble

public final double evaluateDouble(Individual i)
                            throws EvaluationException

Evaluates the variable, which returns its value.

Parameters:

i - The variable being evaluated.

Returns:

A double which is the value of the variable.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateDouble in class Terminal

set

public final void set(double value)

Sets the variable to the specified value.

Parameters:

value - The value to be assigned to the variable.

instance

public final Primitive instance()

Creates a copy of this Terminal.

Returns:

Actaully a reference to the same Terminal since there is no change in instance variables required.

Overrides:

instance in class Primitive

toString

public java.lang.String toString()

Creates a String representing this Terminal.

Returns:

A String containing the name of this Terminal.

Overrides:

toString in class Primitive