com.firefly.utils

类 RandomUtils

java.lang.Object

com.firefly.utils.RandomUtils

public abstract class RandomUtils
extends Object

字段概要

字段

限定符和类型	字段和说明
static String	ALL_CHAR

构造器概要

构造器

构造器和说明
RandomUtils()

方法概要

限定符和类型	方法和说明
static void	main(String[] args)
static long	random(long min, long max) Generates a random number from a specified range
static int	randomSegment(int[] probability) Returns the index of array that specifies probability.
static int	randomSegment(String conf) Returns a index of a specified probability, e.g. the string is "100:1:32:200:16:30".
static String	randomString(int length) Returns a random string.

从类继承的方法 java.lang.Object

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

字段详细资料

ALL_CHAR

public static final String ALL_CHAR

另请参阅:

常量字段值

构造器详细资料

RandomUtils

public RandomUtils()

方法详细资料

random

public static long random(long min,
                          long max)

Generates a random number from a specified range

参数:

min - The minimal number of the range

max - The maximal number of the range

返回:

A random number from minimal number to maximal number, which contains minimal and maximal number.

randomSegment

public static int randomSegment(String conf)

Returns a index of a specified probability, e.g. the string is "100:1:32:200:16:30". If it returns 0 that probability is 100/(100+1+32+200+16+30)

参数:

conf - Configures specified probability

返回:

The index of a specified probability

randomSegment

public static int randomSegment(int[] probability)

Returns the index of array that specifies probability.

参数:

probability - The element of array represents the probability.

返回:

The index of array.

randomString

public static String randomString(int length)

Returns a random string.

参数:

length - The random string's length

返回:

A random string.

main

public static void main(String[] args)