<div>
Then that suggests the Map is null<br />
or (less likely) that 'clientId' is of type Integer and is also null
</div>


<div>
But if you have to do so many checks for null, it suggests something is fundamentally wrong
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<div>
<div class="content wysiwyg-content">
below implementation of if-else checks <br />
1. if the key is in the map <br />
2. if not else logic should fetch data from database.<br />
<br />
but it throws null pointer exception at if statement and does not execute the else part.<br />
<br />
if(mapVpay.containsKey(new<wbr /> Integer(clientID))){<br />
<br />
}else{<br />
//<br />
fetchRecordFromDataBase<br />
}
</div>
</div>


below implementation of if-else checks 
1. if the key is in the map 
2. if not else logic should fetch data from database.

but it throws null pointer exception at if statement and does not execute the else part.

if(mapVpay.containsKey(new Integer(clientID))){

}else{
//
fetchRecordFromDataBase
}

null pointer exception

Java is a platform-independent, object-oriented programming language and run-time environment, designed to have as few implementation dependencies as possible such that developers can write one set of code across all platforms using libraries. Most devices will not run Java natively, and require a run-time component to be installed in order to execute a Java program.