org.evosuite.utils

Class Randomness

java.lang.Object

org.evosuite.utils.Randomness

All Implemented Interfaces:

Serializable

public class Randomness
extends Object
implements Serializable

Unique random number accessor

Author:

Gordon Fraser

See Also:

Serialized Form

Method Summary

Modifier and Type	Method and Description
static <T> T	choice(Collection<T> set) choice
static <T> T	choice(List<T> list) choice
static <T> T	choice(T... elements) choice
static Randomness	getInstance() Getter for the field instance.
static long	getSeed() Getter for the field seed.
static boolean	nextBoolean() nextBoolean
static byte	nextByte() nextByte
static char	nextChar() nextChar
static double	nextDouble() returns a randomly generated double in the range [0,1]
static float	nextFloat() nextFloat
static double	nextGaussian()
static int	nextInt() nextInt
static int	nextInt(int max) nextInt
static int	nextInt(int min, int max) nextInt
static long	nextLong() nextLong
static short	nextShort() nextShort
static String	nextString(int length) nextString
static void	setSeed(long seed) Setter for the field seed.
static void	shuffle(List<?> list) shuffle

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static Randomness getInstance()

Getter for the field instance.

Returns:

a Randomness object.

nextBoolean

public static boolean nextBoolean()

nextBoolean

Returns:

a boolean.

nextInt

public static int nextInt(int max)

nextInt

Parameters:

max - a int.

Returns:

a int.

nextGaussian

public static double nextGaussian()

nextInt

public static int nextInt(int min,
                          int max)

nextInt

Parameters:

min - a int.

max - a int.

Returns:

a int.

nextInt

public static int nextInt()

nextInt

Returns:

a int.

nextChar

public static char nextChar()

nextChar

Returns:

a char.

nextShort

public static short nextShort()

nextShort

Returns:

a short.

nextLong

public static long nextLong()

nextLong

Returns:

a long.

nextByte

public static byte nextByte()

nextByte

Returns:

a byte.

nextDouble

public static double nextDouble()

returns a randomly generated double in the range [0,1]

Returns:

a double between 0.0 and 1.0

nextFloat

public static float nextFloat()

nextFloat

Returns:

a float.

setSeed

public static void setSeed(long seed)

Setter for the field seed.

Parameters:

seed - a long.

getSeed

public static long getSeed()

Getter for the field seed.

Returns:

a long.

choice

public static <T> T choice(List<T> list)

choice

Type Parameters:

T - a T object.

Parameters:

list - a List object.

Returns:

a T object or null if list is empty.

choice

public static <T> T choice(Collection<T> set)

choice

Type Parameters:

T - a T object.

Parameters:

set - a Collection object.

Returns:

a T object or null if set is empty.

choice

public static <T> T choice(T... elements)

choice

Type Parameters:

T - a T object.

Parameters:

elements - a T object.

Returns:

a T object or null if elements.length is zero.

shuffle

public static void shuffle(List<?> list)

shuffle

Parameters:

list - a List object.

nextString

public static String nextString(int length)

nextString

Parameters:

length - a int.

Returns:

a String object.