How to update Value row to database table？

My code

TableQuery q1 = new TableQuery("acmbooks", connectionPool); （table acmbooks）

htContainer = new SQLContainer(q1);

htContainer.addContainerFilter(new Equal("id", 152365)); （id key ）

I can get one row，

but I don't kown How to update property of Value row ？？

((Item)htContainer.firstItemId()).getItemProperty("Property").setValue(“ I want to changed text ”); (Write like this didn't respond）

（I do not see example for update database for use SQLContainer in vaadin book or website！）

Another method

String str1 = "UPDATE acmbooks SET content =" +“ I want to changed text ” + ”WHERE id = 152365“;

FreeformQuery q2 = new FreeformQuery(str1, connectionPool, "ID");

q2.commit();

（This too not right ！ ） What can I do？ Thanks！

I get it！
It is directly in the UI editor inside to submit ！！

Vaadin Is good for Java developers framework ！But memory use is slightly bigger than java jsf2!(Don't know if my code)