Examples: Parent property (Item - Java™)

import lotus.domino.*;
public class JavaAgent extends AgentBase {
  public void NotesMain() {
    try {
      Session session = getSession();
      AgentContext agentContext = session.getAgentContext();
      // (Your code goes here) 
      Database db = agentContext.getCurrentDatabase();
      DocumentCollection dc = db.getAllDocuments();
      Document doc = dc.getFirstDocument();
      Item item = doc.getFirstItem("Subject");
      if (doc != null) parentdoc(item);
    } catch(Exception e) {
      e.printStackTrace();
    }
  }
  public void parentdoc(Item i) {
    try {
      Document doc = i.getParent();
      if (doc.isResponse())
        System.out.println("Parent doc is a response 
        document");
      else
        System.out.println("Parent doc is a main document");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
}