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I have linkId = ApexPages.currentPage().getParameters().get('Id');. I want to determine wether what object this ID belongs. Is it Sample1_Object__c ID or Sample2_Object__c ID..

This is a sample debug of an ID:

USER_DEBUG|[11]|DEBUG|a0T9000000KxMLAEA3
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You could use the getsObjectType() method:

Id i = 'a0T9000000KxMLAEA3';
system.debug(i.getsObjectType());

or 

SObjectType type = ApexPages.currentPage().getParameters().get('Id').getsObjectType();
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  • sir just another question.. How can I determine its Object using visualforce page?.. – Lennon Leopoldo Sep 1 '15 at 8:18
  • @LennonLeopoldo do you have a custom controller or controller extension on the page? – martin Sep 1 '15 at 8:20
  • yes I have. But I'm using this code in vf page. list1Items out is string only. <apex:repeat value="{!list1Items}" var="item"> <li id="{!item}"><div class="item1">{!item}<!-- apex:outputLabel value="{!$ObjectType.Event_Booking__c.fields[item].Label}" /--></div></li> </apex:repeat> – Lennon Leopoldo Sep 1 '15 at 8:22
  • @LennonLeopoldo and are those strings sobject id values? – martin Sep 1 '15 at 8:25
  • yes they are. returned like code like this.. return list2 != null ? list2.split(';') : null; – Lennon Leopoldo Sep 1 '15 at 8:28

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