io.jenetics.prog.op

Class Const<T>

java.lang.Object

io.jenetics.prog.op.Val<T>

io.jenetics.prog.op.Const<T>

All Implemented Interfaces:

Op<T>, Serializable, Function<T[],T>, Supplier<Op<T>>

public final class Const<T>
extends Val<T>
implements Serializable

Represents an operation which always returns the same, constant, value. To improve readability, constants may have a name. If a name is given, this name is used when printing the program tree. The Const operation is a terminal operation.

final static Op<Double> PI = Const.of("π", Math.PI); final static Op<Double> ONE = Const.of(1.0);

Since:

3.9

Version:

5.0

Author:

Franz Wilhelmstötter

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
static <T> Const<T>	of(String name, T value) Return a new constant with the given name and value.
static <T> Const<T>	of(T value) Return a new constant with the given value.
String	toString()
T	value() Return the constant value.

Methods inherited from class io.jenetics.prog.op.Val

apply, arity, equals, hashCode, name

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface io.jenetics.prog.op.Op

get, isTerminal, of

Methods inherited from interface java.util.function.Function

andThen, compose, identity

Method Detail

value

public T value()

Description copied from class: Val

Return the constant value.

Specified by:

value in class Val<T>

Returns:

the constant value

toString

public String toString()

Overrides:

toString in class Object

of

public static <T> Const<T> of(String name,
                              T value)

Return a new constant with the given name and value.

Specified by:

of in interface Op<T>

Type Parameters:

T - the constant type

Parameters:

name - the constant name

value - the constant value

Returns:

a new constant

Throws:

NullPointerException - if the given constant name is null

of

public static <T> Const<T> of(T value)

Return a new constant with the given value.

Type Parameters:

T - the constant type

Parameters:

value - the constant value

Returns:

a new constant