how to fetch the picklist and field values dynamically from multiple objects [duplicate]

Question

public class PickListController
{


global static list<SelectOption> getPicklistValues ('Employee__c' , 'Priority__c')
{
    list<SelectOption> options = new list<SelectOption>();

    // Get the object type of the SObject.
    Schema.sObjectType objType = obj.getSObjectType();

     // Describe the SObject using its object type.
     Schema.DescribeSObjectResult objDescribe = objType.getDescribe();   

     // Get a map of fields for the SObject
     map<String, Schema.SObjectField> fieldMap = objDescribe.fields.getMap(); 

     // Get the list of picklist values for this field.
     list<Schema.PicklistEntry> values =
     fieldMap.get(fld).getDescribe().getPickListValues();

     // Add these values to the selectoption list.
     for (Schema.PicklistEntry a : values)
     { 
        options.add(new SelectOption(a.getLabel(), a.getValue())); 
     }
     return options;
   }
 } 

Answer 1

global static list<SelectOption> getPicklistValues(SObject obj, String fld){
    list<SelectOption> options = new list<SelectOption>();

    // Get the object type of the SObject.
    Schema.sObjectType objType = obj.getSObjectType();

     // Describe the SObject using its object type.
     Schema.DescribeSObjectResult objDescribe = objType.getDescribe();   

     // Get a map of fields for the SObject
     map<String, Schema.SObjectField> fieldMap = objDescribe.fields.getMap(); 

     // Get the list of picklist values for this field.
     list<Schema.PicklistEntry> values =
     fieldMap.get(fld).getDescribe().getPickListValues();

     // Add these values to the selectoption list.
     for (Schema.PicklistEntry a : values)
     { 
        options.add(new SelectOption(a.getLabel(), a.getValue())); 
     }
     return options;
   }
 } 

---

Edit

public class PickListController
{

public PickListController(){
   list<SelectOption> lst = PickListController.getPicklistValues('Employee__c' , 'Priority__c'); 
   system.debug('=============check you picklist value here====='+lst);
}
public static list<SelectOption> getPicklistValues (SObject obj, String fld)
{
    list<SelectOption> options = new list<SelectOption>();

    // Get the object type of the SObject.
    Schema.sObjectType objType = obj.getSObjectType();

     // Describe the SObject using its object type.
     Schema.DescribeSObjectResult objDescribe = objType.getDescribe();   

     // Get a map of fields for the SObject
     map<String, Schema.SObjectField> fieldMap = objDescribe.fields.getMap(); 

     // Get the list of picklist values for this field.
     list<Schema.PicklistEntry> values =
     fieldMap.get(fld).getDescribe().getPickListValues();

     // Add these values to the selectoption list.
     for (Schema.PicklistEntry a : values)
     { 
        options.add(new SelectOption(a.getLabel(), a.getValue())); 
     }
     return options;
   }
 } 

Here is a utility method which i use to fetch picklist value. Use this , pass object name , field name to fetch the values.