StringUtil (Excel Write/Read Framework 0.4.9 API)

java.lang.Object
- org.ttzero.excel.util.StringUtil

```
public class StringUtil
extends Object
```
string util

作者:

guanquan.wang on 2017/9/30.

字段概要

字段
限定符和类型字段和说明

static String EMPTY
Const `""` string

字段
限定符和类型	字段和说明
`static String`	`EMPTY` Const `""` string

方法概要

All Methods Static Methods Concrete Methods
限定符和类型	方法和说明
`static int`	`indexOf(String[] array, String v)` Returns the index within this string array of the first occurrence of the specified string.
`static boolean`	`isEmpty(String s)` Returns `true` if it is null or `String.length()` is `0`.
`static boolean`	`isNotEmpty(String s)` Returns `true` if, and only if, `String.length()` greater than `0`.
`static String`	`lowFirstKey(String key)` Turn the first character into an lower case.
`static void`	`swap(String[] values, int a, int b)` Wrap value in string array
`static String`	`toPascalCase(String name)` Convert to camel case string.
`static String`	`uppFirstKey(String key)` Turn the first character into an upper case.

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
  - EMPTY
```
public static final String EMPTY
```
    Const `""` string
    
    另请参阅:
    
    常量字段值
- 方法详细资料
  - isEmpty
```
public static boolean isEmpty(String s)
```
    Returns true if it is null or String.length() is 0.
    
    参数:
    
    s - string value to check
    
    返回:
    
    true if null or String.length() is 0, otherwise false
  - isNotEmpty
```
public static boolean isNotEmpty(String s)
```
    Returns true if, and only if, String.length() greater than 0.
    
    参数:
    
    s - string value to check
    
    返回:
    
    true if String.length() greater than 0, otherwise false
  - indexOf
```
public static int indexOf(String[] array,
                          String v)
```
    Returns the index within this string array of the first occurrence of the specified string.
    If no such string occurs in this array, then -1 is returned.
    
    参数:
    
    array - array to search
    
    v - the specify string
    
    返回:
    
    the index of the first occurrence of the string in array, or -1 if the string does not occur.
  - uppFirstKey
```
public static String uppFirstKey(String key)
```
    Turn the first character into an upper case. It means if the first character is between 97 and 122, it will be minus 32.
    
    参数:
    
    key - a string to processor
    
    返回:
    
    a string witch the first character is upper case
  - lowFirstKey
```
public static String lowFirstKey(String key)
```
    Turn the first character into an lower case. It means if the first character is between 65 and 90, it will be plus 32.
    
    参数:
    
    key - a string to processor
    
    返回:
    
    a string witch the first character is lower case
  - toPascalCase
```
public static String toPascalCase(String name)
```
    Convert to camel case string.
    
    参数:
    
    name - a string to processor
    
    返回:
    
    a camel case string
  - swap
```
public static void swap(String[] values,
                        int a,
                        int b)
```
    Wrap value in string array
    
    参数:
    
    values - the array to warp
    
    a - from index
    
    b - to index

类 StringUtil

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

EMPTY

方法详细资料

isEmpty

isNotEmpty

indexOf

uppFirstKey

lowFirstKey

toPascalCase

swap