小编Chu*_*ack的帖子

*我没有得到其他函数中的最大值。价值回报为“0”。我尝试但没有成功:( 图片

public int PriceMax(int manhom){
        Connection conn = this.connect();
        int max = 0;
        if(conn != null){
            try {
                java.sql.Statement statement = conn.createStatement();
                String sql = "SELECT AVG(GiaSP) from tbsanpham where manhom = '"+manhom+"'";
                ResultSet rs = statement.executeQuery(sql);
                max = rs.getInt(sql);
            } catch (SQLException ex) {
                Logger.getLogger(CSDL.class.getName()).log(Level.SEVERE, null, ex);
            }
        }
        return max;
    }

帮助！！！

int manhom = cbbNhomSanPham.getSelectedIndex();
        CSDL csdl = new CSDL();
        int max = csdl.PriceMax(manhom);
        JOptionPane.showMessageDialog(null, "Nhóm s?n ph?m: '"+cbbNhomSanPham.getName()+"' \nPrice max: '"+max+"' ");