org.jenetics.tool.problem

Class Knapsack.Item

java.lang.Object

org.jenetics.tool.problem.Knapsack.Item

All Implemented Interfaces:

Serializable

Enclosing class:

Knapsack

public static final class Knapsack.Item
extends Object
implements Serializable

This class represents a knapsack item with the specific size and value.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
double	getSize() Return the item size.
double	getValue() Return the item value.
int	hashCode()
static Knapsack.Item	of(double size, double value) Return a new knapsack Item with the given size and value.
static Knapsack.Item	random(Random random) Create a new random knapsack item for testing purpose.
String	toString()
static Collector<Knapsack.Item,?,Knapsack.Item>	toSum() Return a Collector, which sums the size and value of knapsack items.

Methods inherited from class java.lang.Object

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

Method Detail

getSize

public double getSize()

Return the item size.

Returns:

the item size

getValue

public double getValue()

Return the item value.

Returns:

the item value

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object

of

public static Knapsack.Item of(double size,
                               double value)

Return a new knapsack Item with the given size and value.

Parameters:

size - the item size

value - the item value

Returns:

a new knapsack Item

Throws:

IllegalArgumentException - if one of the parameters is smaller then zero

random

public static Knapsack.Item random(Random random)

Create a new random knapsack item for testing purpose.

Parameters:

random - the random engine used for creating the knapsack item

Returns:

a new random knapsack item

Throws:

NullPointerException - if the random engine is null

toSum

public static Collector<Knapsack.Item,?,Knapsack.Item> toSum()

Return a Collector, which sums the size and value of knapsack items.

Returns:

a knapsack item sum Collector