├── ObjectUtils.java
└── README.md


/ObjectUtils.java:
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 1 | public class ObjectUtils {
 2 | 
 3 |     public static boolean isEmpty(Object s) {
 4 |         if (s == null) {
 5 |             return true;
 6 |         }
 7 |         if ((s instanceof String) && (((String)s).trim().length() == 0)) {
 8 |             return true;
 9 |         }
10 |         if (s instanceof Map) {
11 |             return ((Map<?, ?>)s).isEmpty();
12 |         }
13 |         if (s instanceof List) {
14 |             return ((List<?>)s).isEmpty();
15 |         }
16 |         if (s instanceof Object[]) {
17 |             return (((Object[])s).length == 0);
18 |         }
19 |         return false;
20 |     }
21 | }
22 | 


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/README.md:
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 1 | 
 2 | # ObjectUtils
 3 | when you want check object`(String, List, Map)`is empty or not, you can use this util
 4 | 
 5 | ##How to use
 6 | 
 7 | Use it as Util anywhere. Use it like this:
 8 | 
 9 | ```javascript
10 | if(ObjectUtils.isEmpty(aa)){
11 | // Object is empty.
12 | // do somthing
13 | }
14 | else{
15 | // Object is not empty.
16 | // do somthing
17 | }
18 | ```
19 | 


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