private void insertDataStaff() {
    Connection c = null;
    try {
      Class.forName("org.sqlite.JDBC");
      c = DriverManager.getConnection("jdbc:sqlite:C:/Users/SRV/Desktop/project8");

      // Uses SQL Injection to insert data into Graduate Table
      String sql =
          "insert into staff (sid,lastname, firstname, phone, email, office) "
              + "values (?,?,?,?,?,?)";
      PreparedStatement prespstat = c.prepareStatement(sql);

      for (Staff tmpdata : StaffLst) {
        prespstat.setString(1, null);
        prespstat.setString(2, tmpdata.getLastname());
        prespstat.setString(3, tmpdata.getFirstname());
        prespstat.setInt(4, tmpdata.getPhone());
        prespstat.setString(5, tmpdata.getEmail());
        prespstat.setInt(6, tmpdata.getOffice());

        prespstat.addBatch();
      }

      prespstat.executeBatch();
      prespstat.close();
      c.close();
    } catch (Exception e) {
      System.err.println(e.getClass().getName() + ": " + e.getMessage());
      System.exit(0);
    }
    System.out.println("Database Inserted Successfully");
  }