Question

I want to implement this function, when I click on the button, the value of the button changes. But I know I cannot call the button object itself in its clickHandler. So, How can I do this?

button.addClickHandler(new ClickHandler(){
                public void onClick(ClickEvent event){
                    button.getButtonElement().setValue("X");
                }
            });

Answer 1

2 ways:

((Button)event.getSource()).setValue("x");

Or

Outside the handler, use

final Button btn = button;

Then you will be able to use btn as reference to the button inside the handler .