Want to show a data table populated with data after a button click

Question

I want to write a code in this way, that If I click on a button a data table appears populated with data. before that there should not be the data table in view.

Answer 1

You can initialize a simple getter/setter :

private boolean visible = false; // getter/setter

public void getUserList(ActionEvent event)
{
    setVisible(true);

    // Your code
}

And modify your view like this :

Note the update attribute on button, h:panelGroup wrapper and rendered attribute on table.