my develop env:

when i use updatable ResultSet to update a column value like this:

			

			...
			

			PreparedStatement pstmt = conn.PreparedStatement("select name, score from student where id = ?", ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
			

			

			pstmt.setInt(1, id);
			

			

			ResultSet rs = pstmt.executeQuery();
			

			

			...
			

			

			String newName = new String(name.getBytes("GBK"), "ISO-8859-1");
			

		

			

			....
			

			

			en, my client is based on Chinese OS, so when fetch String from db , i must convert it to GBK like this:
			

			

			...
			

			String name = new String(rs.getString("name").getBytes("ISO-8859-1"), "GBK");
			

			...
			

			

			JTextField nameFld = new JTextField();
			

			nameFld.setText(name);
			

			...
			

			

			my db's character is 'ISO-8859-1'.
			

			

			

			when i write data into db, i must convert it to ISO-8859-1 at first. Always, the following fragment run correctly:
			

			

			...
			

			PreparedStatement pstmt = conn.prepareStatement("update student set name = ? where id = ?");
			

			pstmt.setString(1, new String(name.getBytes("GBK"), "ISO-8859-1"));
			

			pstmt.setInt(2, id);
			

		

but why use Updatable ResultSet to perform update like my first article will throw SQLException?