RandomUtils

Object
- com.net2plan.utils.RandomUtils

```
public class RandomUtils
extends Object
```
Provides static methods to obtain both random numbers and vectors.

Since:

0.2.0

Author:

Pablo Pavon-Marino, Jose-Luis Izquierdo-Zaragoza

Method Summary

Methods
Modifier and Type	Method and Description
`static double`	`random(double minValue, double maxValue)` Returns a random double in range [minValue, maxValue]
`static double[]`	`random(double minValue, double maxValue, int size)` Returns a random double vector, with elements in range [minValue, maxValue]
`static double[]`	`random(double minValue, double maxValue, int size, Random r)` Returns a random double vector, with elements in range [minValue, maxValue]
`static double`	`random(double minValue, double maxValue, Random r)` Returns a random double in range [minValue, maxValue]
`static int`	`random(int minValue, int maxValue)` Returns a random integer in range [minValue, maxValue]
`static int[]`	`random(int minValue, int maxValue, int size)` Returns a random integer vector, with elements in range [minValue, maxValue]
`static int[]`	`random(int minValue, int maxValue, int size, Random r)` Returns a random integer vector, with elements in range [minValue, maxValue]
`static int`	`random(int minValue, int maxValue, Random r)` Returns a random integer in range [minValue, maxValue]
`static long`	`random(long minValue, long maxValue)` Returns a random long in range [minValue, maxValue]
`static long[]`	`random(long minValue, long maxValue, int size)` Returns a random long vector, with elements in range [minValue, maxValue]
`static long[]`	`random(long minValue, long maxValue, int size, Random r)` Returns a random long vector, with elements in range [minValue, maxValue]
`static long`	`random(long minValue, long maxValue, Random r)` Returns a random long in range [minValue, maxValue]
`static int`	`select(double[] array)` Returns the index of a random item of an array with uniform probability.
`static int`	`select(double[] array, Random r)` Returns the index of a random item of an array with uniform probability.
`static int`	`select(int[] array)` Returns the index of a random item of an array with uniform probability.
`static int`	`select(int[] array, Random r)` Returns the index of a random item of an array with uniform probability.
`static int`	`select(long[] array)` Returns the index of a random item of an array with uniform probability.
`static int`	`select(long[] array, Random r)` Returns the index of a random item of an array with uniform probability.
`static int`	`selectWeighted(double[] weightArray)` Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
`static int`	`selectWeighted(double[] weightArray, Random r)` Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
`static int`	`selectWeighted(int[] weightArray)` Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
`static int`	`selectWeighted(int[] weightArray, Random r)` Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
`static int`	`selectWeighted(long[] weightArray)` Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
`static int`	`selectWeighted(long[] weightArray, Random r)` Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
`static <A,B extends Number> A`	`selectWeighted(Map<A,B> weightedMap)` Returns the key of a random map entry where the chances of choosing it are relative to its value.
`static <A,B extends Number> A`	`selectWeighted(Map<A,B> weightedMap, Random r)` Returns the key of a random map entry where the chances of choosing it are relative to its value.
`static void`	`shuffle(double[] array)` Implements Fisher-Yates shuffle.
`static void`	`shuffle(double[] array, Random r)` Implements Fisher-Yates shuffle.
`static void`	`shuffle(int[] array)` Implements Fisher-Yates shuffle.
`static void`	`shuffle(int[] array, Random r)` Implements Fisher-Yates shuffle.
`static void`	`shuffle(long[] array)` Implements Fisher-Yates shuffle.
`static void`	`shuffle(long[] array, Random r)` Implements Fisher-Yates shuffle.

Methods inherited from class Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - random
```
public static double random(double minValue,
            double maxValue)
```
    Returns a random double in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    
    Returns:
    Random double in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static double[] random(double minValue,
              double maxValue,
              int size)
```
    Returns a random double vector, with elements in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    size - Number of elements
    
    Returns:
    A random double vector, with elements in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static double[] random(double minValue,
              double maxValue,
              int size,
              Random r)
```
    Returns a random double vector, with elements in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    size - Number of elements
    r - Random generator
    
    Returns:
    A random double vector, with elements in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static double random(double minValue,
            double maxValue,
            Random r)
```
    Returns a random double in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    r - Random generator
    
    Returns:
    Random double in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static int random(int minValue,
         int maxValue)
```
    Returns a random integer in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    
    Returns:
    Random integer in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static int[] random(int minValue,
           int maxValue,
           int size)
```
    Returns a random integer vector, with elements in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    size - Number of elements
    
    Returns:
    A random integer vector, with elements in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static int[] random(int minValue,
           int maxValue,
           int size,
           Random r)
```
    Returns a random integer vector, with elements in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    size - Number of elements
    r - Random generator
    
    Returns:
    A random integer vector, with elements in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static int random(int minValue,
         int maxValue,
         Random r)
```
    Returns a random integer in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    r - Random generator
    
    Returns:
    Random integer in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static long random(long minValue,
          long maxValue)
```
    Returns a random long in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    
    Returns:
    Random long in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static long[] random(long minValue,
            long maxValue,
            int size)
```
    Returns a random long vector, with elements in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    size - Number of elements
    
    Returns:
    A random long vector, with elements in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static long[] random(long minValue,
            long maxValue,
            int size,
            Random r)
```
    Returns a random long vector, with elements in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    size - Number of elements
    r - Random generator
    
    Returns:
    A random long vector, with elements in range [minValue, maxValue]
    Since:
    
    0.2.0
  - random
```
public static long random(long minValue,
          long maxValue,
          Random r)
```
    Returns a random long in range [minValue, maxValue]
    
    Parameters:
    minValue - Minimum value (inclusive)
    maxValue - Maximum value (inclusive)
    r - Random generator
    
    Returns:
    Random long in range [minValue, maxValue]
    Since:
    
    0.2.0
  - select
```
public static int select(double[] array)
```
    Returns the index of a random item of an array with uniform probability.
    
    Parameters:
    array - Input array
    
    Returns:
    Random index
    Since:
    
    0.3.0
  - select
```
public static int select(double[] array,
         Random r)
```
    Returns the index of a random item of an array with uniform probability.
    
    Parameters:
    array - Input array
    r - Random generator
    
    Returns:
    Random index
    Since:
    
    0.3.0
  - select
```
public static int select(int[] array)
```
    Returns the index of a random item of an array with uniform probability.
    
    Parameters:
    array - Input array
    
    Returns:
    Random index
    Since:
    
    0.3.0
  - select
```
public static int select(int[] array,
         Random r)
```
    Returns the index of a random item of an array with uniform probability.
    
    Parameters:
    array - Input array
    r - Random generator
    
    Returns:
    Random index
    Since:
    
    0.3.0
  - select
```
public static int select(long[] array)
```
    Returns the index of a random item of an array with uniform probability.
    
    Parameters:
    array - Input array
    
    Returns:
    Random index
    Since:
    
    0.3.0
  - select
```
public static int select(long[] array,
         Random r)
```
    Returns the index of a random item of an array with uniform probability.
    
    Parameters:
    array - Input array
    r - Random generator
    
    Returns:
    Random index
    Since:
    
    0.3.0
  - selectWeighted
```
public static int selectWeighted(double[] weightArray)
```
    Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
    
    Important: Positions whose value is equal to zero will not be selected, and negative values are not allowed.
    
    Important: Sum of values cannot reach Double.MAX_VALUE.
    
    Parameters:
    weightArray - Weight array
    
    Returns:
    Random index
    Since:
    
    0.3.0
  - selectWeighted
```
public static int selectWeighted(double[] weightArray,
                 Random r)
```
    Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
    
    Important: Positions whose value is equal to zero will not be selected, and negative values are not allowed.
    
    Important: Sum of values cannot reach Double.MAX_VALUE.
    
    Parameters:
    weightArray - Weight array
    r - Random generator
    
    Returns:
    Random index
    Since:
    
    0.3.0
  - selectWeighted
```
public static int selectWeighted(int[] weightArray)
```
    Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
    
    Important: Positions whose value is equal to zero will not be selected, and negative values are not allowed.
    
    Important: Sum of values cannot reach Double.MAX_VALUE.
    
    Parameters:
    weightArray - Weight array
    
    Returns:
    Random index
    Since:
    
    0.3.1
  - selectWeighted
```
public static int selectWeighted(int[] weightArray,
                 Random r)
```
    Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
    
    Important: Positions whose value is equal to zero will not be selected, and negative values are not allowed.
    
    Important: Sum of values cannot reach Double.MAX_VALUE.
    
    Parameters:
    weightArray - Weight array
    r - Random generator
    
    Returns:
    Random index
    Since:
    
    0.3.1
  - selectWeighted
```
public static int selectWeighted(long[] weightArray)
```
    Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
    
    Important: Positions whose value is equal to zero will not be selected, and negative values are not allowed.
    
    Important: Sum of values cannot reach Double.MAX_VALUE.
    
    Parameters:
    weightArray - Weight array
    
    Returns:
    Random index
    Since:
    
    0.3.1
  - selectWeighted
```
public static int selectWeighted(long[] weightArray,
                 Random r)
```
    Returns the index of a random item of an array where the chances of choosing it are relative to its weight.
    
    Important: Positions whose value is equal to zero will not be selected, and negative values are not allowed.
    
    Important: Sum of values cannot reach Double.MAX_VALUE.
    
    Parameters:
    weightArray - Weight array
    r - Random generator
    
    Returns:
    Random index
    Since:
    
    0.3.1
  - selectWeighted
```
public static <A,B extends Number> A selectWeighted(Map<A,B> weightedMap)
```
    Returns the key of a random map entry where the chances of choosing it are relative to its value.
    
    Important: Entries whose value is equal to zero will not be selected, and negative values are not allowed.
    
    Important: Sum of entry values cannot reach Double.MAX_VALUE.
    
    Type Parameters:
    A - Key type
    B - Value type
    Parameters:
    weightedMap - Weight map
    
    Returns:
    Random key
    Since:
    
    0.3.1
  - selectWeighted
```
public static <A,B extends Number> A selectWeighted(Map<A,B> weightedMap,
                                    Random r)
```
    Returns the key of a random map entry where the chances of choosing it are relative to its value.
    
    Important: Entries whose value is equal to zero will not be selected, and negative values are not allowed.
    
    Important: Sum of entry values cannot reach Double.MAX_VALUE.
    
    Type Parameters:
    A - Key type
    B - Value type
    Parameters:
    weightedMap - Weight map
    r - Random generator
    
    Returns:
    Random key
    Since:
    
    0.3.1
  - shuffle
```
public static void shuffle(double[] array)
```
    Implements Fisher-Yates shuffle.
    
    Parameters:
    array - Array to be shuffled
    Since:
    
    0.2.3
  - shuffle
```
public static void shuffle(double[] array,
           Random r)
```
    Implements Fisher-Yates shuffle.
    
    Parameters:
    array - Array to be shuffled
    r - Random generator
    Since:
    
    0.2.3
  - shuffle
```
public static void shuffle(int[] array)
```
    Implements Fisher-Yates shuffle.
    
    Parameters:
    array - Array to be shuffled
    Since:
    
    0.2.3
  - shuffle
```
public static void shuffle(int[] array,
           Random r)
```
    Implements Fisher-Yates shuffle.
    
    Parameters:
    array - Array to be shuffled
    r - Random generator
    Since:
    
    0.2.3
  - shuffle
```
public static void shuffle(long[] array)
```
    Implements Fisher-Yates shuffle.
    
    Parameters:
    array - Array to be shuffled
    Since:
    
    0.2.3
  - shuffle
```
public static void shuffle(long[] array,
           Random r)
```
    Implements Fisher-Yates shuffle.
    
    Parameters:
    array - Array to be shuffled
    r - Random generator
    Since:
    
    0.2.3

Class RandomUtils

Method Summary

Methods inherited from class Object

Method Detail

random

random

random

random

random

random

random

random

random

random

random

random

select

select

select

select

select

select

selectWeighted

selectWeighted

selectWeighted

selectWeighted

selectWeighted

selectWeighted

selectWeighted

selectWeighted

shuffle

shuffle

shuffle

shuffle

shuffle

shuffle