switch_with_object.js

sobject obj = null;

switch on obj  {
   //checks whether the obj is an instance of Account. 
   //if yes, obj is casted to acc with relevant values
   when Account acc {
       System.debug('account ' + acc);
   }
   //checks whether the obj is an instance of Contact. 
   //if yes, obj is casted to con with relevant values
   when Contact con {
       System.debug('contact ' + con);
   }
   //checks obj == null
   when null {
       System.debug('null');
   }
   // default block
   when else {
       System.debug('default');
   }
}