To simplify things and help our users to be more productive, we have archived the current forum and focus our efforts on helping developers on Stack Overflow. You can post new questions on Stack Overflow or join our Discord channel.
how to set the location of textfields,buttons,and so on
What do you mean by location?
The application layout is controlled with layout components, as in desktop Java frameworks, such as AWT or Swing.
Components are positioned by adding them to the layouts. For more information, see Chapter 6 from the Book of Vaadin.