jdbc_old.java

try ( Connection connection = dataSource.getConnection(); ){
  try( PreparedStatement pstmt = connection.prepareStatement("SELECT studentName from student where studentId = 1"); ) {
    try( ResultSet resultSet = pstmt.executeQuery(); ) {
      while (resultSet.next()) {
        System.out.println(resultSet.getString(1));
      }
    }
  }
}