RandomUtils (Trinea Android Common Library 4.2.15 API)

java.lang.Object
- cn.trinea.android.common.util.RandomUtils

```
public class RandomUtils
extends Object
```
Random Utils
- shuffle(Object[]) Shuffling algorithm, Randomly permutes the specified array using a default source of randomness
- shuffle(Object[], int) Shuffling algorithm, Randomly permutes the specified array
- shuffle(int[]) Shuffling algorithm, Randomly permutes the specified int array using a default source of randomness
- shuffle(int[], int) Shuffling algorithm, Randomly permutes the specified int array
- getRandom(int) get random int between 0 and max
- getRandom(int, int) get random int between min and max
- getRandomCapitalLetters(int) get a fixed-length random string, its a mixture of uppercase letters
- getRandomLetters(int) get a fixed-length random string, its a mixture of uppercase and lowercase letters
- getRandomLowerCaseLetters(int) get a fixed-length random string, its a mixture of lowercase letters
- getRandomNumbers(int) get a fixed-length random string, its a mixture of numbers
- getRandomNumbersAndLetters(int) get a fixed-length random string, its a mixture of uppercase, lowercase letters and numbers
- getRandom(String, int) get a fixed-length random string, its a mixture of chars in source
- getRandom(char[], int) get a fixed-length random string, its a mixture of chars in sourceChar
作者:

Trinea 2012-5-12

字段概要

字段
限定符和类型	字段和说明
`static String`	`CAPITAL_LETTERS`
`static String`	`LETTERS`
`static String`	`LOWER_CASE_LETTERS`
`static String`	`NUMBERS`
`static String`	`NUMBERS_AND_LETTERS`

构造器概要

构造器
构造器和说明

RandomUtils()

构造器
构造器和说明
`RandomUtils()`

方法概要

方法
限定符和类型	方法和说明
`static String`	`getRandom(char[] sourceChar, int length)` get a fixed-length random string, its a mixture of chars in sourceChar
`static int`	`getRandom(int max)` get random int between 0 and max
`static int`	`getRandom(int min, int max)` get random int between min and max
`static String`	`getRandom(String source, int length)` get a fixed-length random string, its a mixture of chars in source
`static String`	`getRandomCapitalLetters(int length)` get a fixed-length random string, its a mixture of uppercase letters
`static String`	`getRandomLetters(int length)` get a fixed-length random string, its a mixture of uppercase and lowercase letters
`static String`	`getRandomLowerCaseLetters(int length)` get a fixed-length random string, its a mixture of lowercase letters
`static String`	`getRandomNumbers(int length)` get a fixed-length random string, its a mixture of numbers
`static String`	`getRandomNumbersAndLetters(int length)` get a fixed-length random string, its a mixture of uppercase, lowercase letters and numbers
`static int[]`	`shuffle(int[] intArray)` Shuffling algorithm, Randomly permutes the specified int array using a default source of randomness
`static int[]`	`shuffle(int[] intArray, int shuffleCount)` Shuffling algorithm, Randomly permutes the specified int array
`static boolean`	`shuffle(Object[] objArray)` Shuffling algorithm, Randomly permutes the specified array using a default source of randomness
`static boolean`	`shuffle(Object[] objArray, int shuffleCount)` Shuffling algorithm, Randomly permutes the specified array

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
  - NUMBERS_AND_LETTERS
```
public static final String NUMBERS_AND_LETTERS
```
    另请参阅:
    常量字段值
  - NUMBERS
```
public static final String NUMBERS
```
    另请参阅:
    常量字段值
  - LETTERS
```
public static final String LETTERS
```
    另请参阅:
    常量字段值
  - CAPITAL_LETTERS
```
public static final String CAPITAL_LETTERS
```
    另请参阅:
    常量字段值
  - LOWER_CASE_LETTERS
```
public static final String LOWER_CASE_LETTERS
```
    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
  - getRandomNumbersAndLetters
```
public static String getRandomNumbersAndLetters(int length)
```
    get a fixed-length random string, its a mixture of uppercase, lowercase letters and numbers
    
    参数:
    length -
    
    返回:
    另请参阅:
    getRandom(String source, int length)
  - getRandomNumbers
```
public static String getRandomNumbers(int length)
```
    get a fixed-length random string, its a mixture of numbers
    
    参数:
    length -
    
    返回:
    另请参阅:
    getRandom(String source, int length)
  - getRandomLetters
```
public static String getRandomLetters(int length)
```
    get a fixed-length random string, its a mixture of uppercase and lowercase letters
    
    参数:
    length -
    
    返回:
    另请参阅:
    getRandom(String source, int length)
  - getRandomCapitalLetters
```
public static String getRandomCapitalLetters(int length)
```
    get a fixed-length random string, its a mixture of uppercase letters
    
    参数:
    length -
    
    返回:
    另请参阅:
    getRandom(String source, int length)
  - getRandomLowerCaseLetters
```
public static String getRandomLowerCaseLetters(int length)
```
    get a fixed-length random string, its a mixture of lowercase letters
    
    参数:
    length -
    
    返回:
    另请参阅:
    getRandom(String source, int length)
  - getRandom
```
public static String getRandom(String source,
               int length)
```
    get a fixed-length random string, its a mixture of chars in source
    参数:
    source -
    length -
    
    返回:
    if source is null or empty, return null
    
    else see getRandom(char[] sourceChar, int length)
  - getRandom
```
public static String getRandom(char[] sourceChar,
               int length)
```
    get a fixed-length random string, its a mixture of chars in sourceChar
    参数:
    sourceChar -
    length -
    
    返回:
    if sourceChar is null or empty, return null
    
    if length less than 0, return null
  - getRandom
```
public static int getRandom(int max)
```
    get random int between 0 and max
    参数:
    max -
    
    返回:
    if max <= 0, return 0
    
    else return random int between 0 and max
  - getRandom
```
public static int getRandom(int min,
            int max)
```
    get random int between min and max
    参数:
    min -
    max -
    
    返回:
    if min > max, return 0
    
    if min == max, return min
    
    else return random int between min and max
  - shuffle
```
public static boolean shuffle(Object[] objArray)
```
    Shuffling algorithm, Randomly permutes the specified array using a default source of randomness
    
    参数:
    objArray -
    
    返回:
  - shuffle
```
public static boolean shuffle(Object[] objArray,
              int shuffleCount)
```
    Shuffling algorithm, Randomly permutes the specified array
    
    参数:
    objArray -
    shuffleCount -
    
    返回:
  - shuffle
```
public static int[] shuffle(int[] intArray)
```
    Shuffling algorithm, Randomly permutes the specified int array using a default source of randomness
    
    参数:
    intArray -
    
    返回:
  - shuffle
```
public static int[] shuffle(int[] intArray,
            int shuffleCount)
```
    Shuffling algorithm, Randomly permutes the specified int array
    
    参数:
    intArray -
    shuffleCount -
    
    返回:

类 RandomUtils

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

NUMBERS_AND_LETTERS

NUMBERS

LETTERS

CAPITAL_LETTERS

LOWER_CASE_LETTERS

构造器详细资料

RandomUtils

方法详细资料

getRandomNumbersAndLetters

getRandomNumbers

getRandomLetters

getRandomCapitalLetters

getRandomLowerCaseLetters

getRandom

getRandom

getRandom

getRandom

shuffle

shuffle

shuffle

shuffle