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## org.apache.struts2.util
Class ContainUtil

    java.lang.Object
      org.apache.struts2.util.ContainUtil

    public class ContainUtil

extends Object

`ContainUtil` will check if object 1 contains object 2. Object 1 may be an Object, array, Collection, or a Map

Version:
  $Date$ $Id$

Constructor Summary
`ContainUtil()`

Method Summary
`static boolean` | `contains(Object obj1, Object obj2)` Determine if `obj2` exists in `obj1`.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### ContainUtil

    public ContainUtil()

Method Detail

### contains

    public static boolean contains(Object obj1,
                                   Object obj2)

  Determine if `obj2` exists in `obj1`.

  Type Of obj1 | Comparison type
  null |  | always return false
  Map | Map containsKey(obj2)
  Collection | Collection contains(obj2)
  Array | there's an array element (e) where e.equals(obj2)
  Object | obj1.equals(obj2)

  Parameters:
    `obj1` -
    `obj2` -
  Returns:

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