Java SQL FAQ: Can you provide a Java PreparedStatement example that shows how to use a SQL UPDATE?

Sure. I have quite a few examples on this website, just see the "Related" section for those. But for now, here's a short sample method that performs a JDBC SQL UPDATE using a Java PreparedStatement:

// a java preparedstatement example
public static void updateDescriptionAndAuthor (
  Connection conn,
  String description,
  int id,
  int seqNum,
  String author
)
throws SQLException
{
  try
  {
    // create our java preparedstatement using a sql update query
    PreparedStatement ps = conn.prepareStatement(
      "UPDATE Messages SET description = ?, author = ? WHERE id = ? AND seq_num = ?");
    // set the preparedstatement parameters
    ps.setString(1,description);
    ps.setString(2,author);
    ps.setInt(3,id);
    ps.setInt(4,seqNum);
    // call executeUpdate to execute our sql update statement
    ps.executeUpdate();
    ps.close();
  }
  catch (SQLException se)
  {
    // log the exception
    throw se;
  }
}

I'll skip the description of this PreparedStatement UPDATE example for now, but if you have any questions or comments, just leave them below, and I'll be glad to respond to them.