Package ru.progrm_jarvis.javacommons.random

Class RandomUtil

java.lang.Object

ru.progrm_jarvis.javacommons.random.RandomUtil

public final class RandomUtil
extends Object

Utility for getting random values.

Method Summary

Modifier and Type	Method	Description
static <T> T	getRandom(@NonNull Collection<T> values)	Gets a random value from the collection specified.
static <T> T	getRandom(@NonNull List<T> values)	Gets a random value from the list specified.
static <T> T	getRandom(@NonNull Map<T,Integer> chancedValues)	Gets a random value from the map specified considering chances.
static int	randomSign()	Provides 1 or -1 randomly.

Methods inherited from class java.lang.Object

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

Method Details

randomSign

public static int randomSign()

Provides 1 or -1 randomly.

Returns:

1 or -1

getRandom

public static <T> T getRandom(@NonNull
 @NonNull Map<T,Integer> chancedValues)

Gets a random value from the map specified considering chances.

Type Parameters:

T - type of value randomly got

Parameters:

chancedValues - values from which to get a random one the keys of the map are the actual values, the values of the map are the chances

Returns:

got random value

Throws:

IllegalArgumentException - if values is empty

getRandom

public static <T> T getRandom(@NonNull
 @NonNull List<T> values)

Gets a random value from the list specified.

Type Parameters:

T - type of value randomly got

Parameters:

values - values from which to get a random one

Returns:

got random value

Throws:

IllegalArgumentException - if values is empty

getRandom

public static <T> T getRandom(@NonNull
 @NonNull Collection<T> values)

Gets a random value from the collection specified.

Type Parameters:

T - type of value randomly got

Parameters:

values - values from which to get a random one

Returns:

got random value

Throws:

IllegalArgumentException - if values is empty