import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class update_theme {
    public static void main(String[] args) {
        String url = "jdbc:oracle:thin:@localhost:1521/sisvietnam";
        String user = "sisvietnam";
        String password = "sisvietnam";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            // Let's first see what's in sis_setting
            try (PreparedStatement checkStmt = conn.prepareStatement("SELECT ID, THEME FROM sis_setting")) {
                ResultSet rs = checkStmt.executeQuery();
                while (rs.next()) {
                    System.out.println("ID: " + rs.getLong("ID") + ", THEME: " + rs.getString("THEME"));
                }
            } catch (Exception e) {
                System.out.println("Error reading theme: " + e.getMessage());
            }

            // Update theme
            String updateQuery = "UPDATE sis_setting SET THEME = 'umass'";
            try (PreparedStatement updateStmt = conn.prepareStatement(updateQuery)) {
                int rows = updateStmt.executeUpdate();
                System.out.println("Rows updated: " + rows);
            }

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}