CollectionsUtils2 (leiothrix-common 0.1 API)

java.lang.Object
- xin.bluesky.leiothrix.common.util.CollectionsUtils2

```
public class CollectionsUtils2
extends Object
```
集合工具类.

作者:

张轲 worker.processor.threadnum.factor

构造器概要

构造器
构造器和说明

CollectionsUtils2()

构造器
构造器和说明
`CollectionsUtils2()`

方法概要

All Methods Static Methods Concrete Methods
限定符和类型	方法和说明
`static boolean`	`isEmpty(Collection<? extends Object> coll)` 判定集合是否为空.如果集合为null或isEmpty(),则返回true,否则返回false.
`static boolean`	`isEmpty(Map<? extends Object,? extends Object> map)` 判定Map是否为空.如Map为null或size()==0,则返回true,否则返回false.
`static String`	`toString(Collection<? extends Object> coll)` 将集合转化为以逗号相隔的字符串,如: "banana,apple,pear"
`static String`	`toString(Collection<? extends Object> coll, String separator)` 将集合转化为由separator指定的分隔符分隔的字符串
`static String`	`toString(Map<? extends Object,? extends Object> map)` 将Map转为为字符串,如: name=zhangke,age=20,address=hangzhou.
`static String`	`toString(Object[] array)` 将数组转化为逗号相隔的字符串,如: "banana,apple,pear"
`static String`	`toString(Object[] array, String separator)` 将数组转化为由separator指定的分隔符分隔的字符串

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 构造器详细资料
  - CollectionsUtils2
```
public CollectionsUtils2()
```
- 方法详细资料
  - isEmpty
```
public static boolean isEmpty(Collection<? extends Object> coll)
```
    判定集合是否为空.如果集合为null或isEmpty(),则返回true,否则返回false.
    
    参数:
    
    coll -
    
    返回:
  - isEmpty
```
public static boolean isEmpty(Map<? extends Object,? extends Object> map)
```
    判定Map是否为空.如Map为null或size()==0,则返回true,否则返回false.
    
    参数:
    
    map -
    
    返回:
  - toString
```
public static String toString(Collection<? extends Object> coll)
```
    将集合转化为以逗号相隔的字符串,如: "banana,apple,pear"
    
    参数:
    
    coll -
    
    返回:
  - toString
```
public static String toString(Object[] array)
```
    将数组转化为逗号相隔的字符串,如: "banana,apple,pear"
    
    参数:
    
    array -
    
    返回:
  - toString
```
public static String toString(Map<? extends Object,? extends Object> map)
```
    将Map转为为字符串,如: name=zhangke,age=20,address=hangzhou.
    
    参数:
    
    map -
    
    返回:
  - toString
```
public static String toString(Collection<? extends Object> coll,
                              String separator)
```
    将集合转化为由separator指定的分隔符分隔的字符串
    
    参数:
    
    coll -
    
    separator -
    
    返回:
  - toString
```
public static String toString(Object[] array,
                              String separator)
```
    将数组转化为由separator指定的分隔符分隔的字符串
    
    参数:
    
    array -
    
    separator -
    
    返回:

类 CollectionsUtils2

构造器概要

方法概要

从类继承的方法 java.lang.Object

构造器详细资料

CollectionsUtils2

方法详细资料

isEmpty

isEmpty

toString

toString

toString

toString

toString