gpsys.primitives
Class ConstantFloat

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

public class ConstantFloat

extends Terminal

	FLOAT ConstantFloat
 

Creates a Terminal representing an ephemeral random constant of Type FLOAT.

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

float	f The value of this constant.
private float	from The smallest value that this constant can take.
private java.util.Random	rng The random number generator used to create this constant.
private float	to The largest value that this constant can take.

Fields inherited from class gpsys.Primitive

type

Constructor Summary

ConstantFloat(java.util.Random rng, float from, float to)
Create a ephemeral random constant of type float in the range between from and to using the random number generator rng.

Method Summary

float	evaluateFloat(Individual i) Evaluate this Terminal.
Primitive	instance() Creates a new FLOAT constant in exactly the same range as this constant, and using the same random number generator.
java.lang.String	toString() Returns the value of the constant as a String.

Methods inherited from class gpsys.Terminal

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

Methods inherited from class java.lang.Object

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

Field Detail

f

public float f

The value of this constant.

from

private float from

The smallest value that this constant can take.

to

private float to

The largest value that this constant can take.

rng

private java.util.Random rng

The random number generator used to create this constant.

Constructor Detail

ConstantFloat

public ConstantFloat(java.util.Random rng,
                     float from,
                     float to)

Create a ephemeral random constant of type float in the range between from and to using the random number generator rng.

Parameters:

rng - The random number generator to be used.

from - The smallest value that the constant can take.

to - The largest value that the constant can take.

Method Detail

evaluateFloat

public final float evaluateFloat(Individual i)
                          throws EvaluationException

Evaluate this Terminal.

Parameters:

i - The individual being evaluated.

Returns:

The value of the constant.

Throws:

EvaluationException - If there is an evaluation failure.

Overrides:

evaluateFloat in class Terminal

instance

public final Primitive instance()

Creates a new FLOAT constant in exactly the same range as this constant, and using the same random number generator.

Returns:

A new FLOAT constant in exactly the same range.

Overrides:

instance in class Primitive

toString

public java.lang.String toString()

Returns the value of the constant as a String.

Returns:

A String representing the value of this constant.

Overrides:

toString in class Primitive