插入数据失败

Question

我真的不知道问题出在哪里。 我的变数：

String notes = hNotes.getText();
Double resTot = Double.parseDouble(hRes.getText());
Double reakTot = Double.parseDouble(hReak.getText());

这里是buttonActions：

try {            
        String que = "insert into result(notes,resistance,reactant) values(?,?,?)";
        PreparedStatement ps = c.prepareStatement(que, Statement.RETURN_GENERATED_KEYS);
        ps.setString(1, notes);
        ps.setDouble(2, resTot);
        ps.setDouble(3, reakTot);

        ps.executeUpdate(); //this code is failed to execute
        ps.close();

        JOptionPane.showMessageDialog(this,"Success..!!","Info Message",1);

    } catch (SQLException e){
        JOptionPane.showMessageDialog(this,"Failed..!!","Error Message",0);
    } finally{
        loadData();
    }

当我按下按钮时，它总是给我失败的结果。 这是我的表结构：

id, int(11) --> autoincrement
notes, varchar(20), not null
resistance, double, not null
reactant, double, not null