What is the return type of Future Method in Salesforce?

Hello Sanjana,

The return type of Future Method can only be a void type.

Thanks.

Hi,

Future Apex. Future Apex is used to run processes in a separate thread, at a later time when system resources become available. Note: Technically, you use the @future annotation to identify methods that run asynchronously.

Methods with the future annotation must be static methods, and can only return a void type. The specified parameters must be primitive data types, arrays of primitive data types, or collections of primitive data types. Methods with the futureannotation cannot take sObjects or objects as arguments.

The reason why sObjects can’t be passed as arguments to future methods is because the sObject might change between the time you call the method and the time it executes. In this case, the future method will get the old sObject values and might overwrite them. To work with sObjects that already exist in the database, pass the sObject ID instead (or collection of IDs) and use the ID to perform a query for the most up-to-date record. The following example shows how to do so with a list of IDs.

global class FutureMethodRecordProcessing
{
@future
public static void processRecords(List<ID> recordIds)
{
// Get those records based on the IDs
List<Account> accts = [SELECT Name FROM Account WHERE Id IN :recordIds];
// Process records
}
}

Hope this helps.