Page Comparison

import org.openmrs.Person;
import org.openmrs.Obs;

// Create a list with one person
List<Person> personList = new ArrayList<Person>();
personList.add(Context.getPersonService().getPerson(4562)) // using a random person ID for example

// Get all observations for person 4562 that are not voided
List<Obs> obsList = Context.getObsService().
    getObservations(personList, null, null, null, null, null, null, null, null, null, null, false);

// obsList now contains all non-voided observations for person 4562