- TIBCO BusinessEvents®
- Standard
- Collections
- Map
- Concurrent

# Collections.Map.Concurrent.containsKey()

## Signature

`boolean containsKey ( Object map, Object key )`

## Domain

ACTION

## Description

Returns true, if this map contains a mapping for the specified.

## Parameters

Name | Type | Description
--- | --- | ---
`map` | `Object` | The Map object
`key` | `Object` | Key whose presence in this map is to be tested

## Returns

Type | Description
--- | ---
`boolean` | true, If this map contains a mapping for the specified key

## Cautions

none