插入值附近的语法不正确

Question

我编写了这段代码来编辑名为RegisterationForm的数据库的现有表。我正在使用Jframe表单，但在按下编辑按钮运行程序后，错误会在“我为sourceName输入的单词”附近显示 incorrect syntax 。

即使我没有更改任何内容并按编辑，也会出现错误。 我试过调试，但我找不到有什么问题。 reg是组合框的名称我想从中选择一个现有的RegisterationForm id来编辑其记录。

我的代码：

private void editActionPerformed(java.awt.event.ActionEvent evt) {                                         
    if(l==0)
    {
        JOptionPane.showMessageDialog(rootPane,"choose a number", WIDTH);
        return;

    }
    if(id.getText().equalsIgnoreCase(""))
    {
        JOptionPane.showMessageDialog(rootPane,"retry", WIDTH);
        return;
    }


        String s="update RegisterationForm set id='"+id.getText()+"' , date="+date.getText()+" , sourceName="+sourceName.getText()+" , sourceCode='"+sourceCode.getText()+"'  where id='"+reg.getSelectedItem().toString()+"'";
        try 
        {
            DBlabprj.stmt.execute(s);
            JOptionPane.showMessageDialog(rootPane,"Done.");
            this.dispose();
            this.setVisible(false);

        } 
        catch (Exception e)
        {
              JOptionPane.showMessageDialog(rootPane,e.getMessage());
        }       
}                                        

private void showActionPerformed(java.awt.event.ActionEvent evt) {                                         
    reg.setEnabled(false);
    l=1;
    String s="select * from RegisterationForm where id='"+reg.getSelectedItem().toString()+"'";

    try
    {
        DBlabprj.rs=DBlabprj.stmt.executeQuery(s);
        DBlabprj.rs.next();
        id.setText(DBlabprj.rs.getString("id"));
        date.setText(DBlabprj.rs.getString("date"));
        sourceName.setText(DBlabprj.rs.getString("sourceName"));
        sourceCode.setText(DBlabprj.rs.getString("sourceCode"));

    } 
    catch (Exception e)
    {
        JOptionPane.showMessageDialog(rootPane,e.getMessage());
    }
}                                        

private void formWindowOpened(java.awt.event.WindowEvent evt) {                                  
    setDefaultCloseOperation(DISPOSE_ON_CLOSE);
    reg.removeAllItems();
    String s="";
    s="select id from RegisterationForm order by id";

    try {
        DBlabprj.rs=DBlabprj.stmt.executeQuery(s);
         while(DBlabprj.rs.next())
        {
            reg.addItem(DBlabprj.rs.getString("id"));
        }


    } catch (SQLException ex) {
        JOptionPane.showMessageDialog(rootPane,ex.getMessage());
        Logger.getLogger(NewForm.class.getName()).log(Level.SEVERE, null, ex);
    }        
}