gwt - Check if a Checkbox is checked?

Question

In my Project i have this Checkbox

<g:CheckBox ui:field="answer"></g:CheckBox> <span class="{style.answer-font}">arithmetische Operatoren</span>

and this Button

<g:Button ui:field="abgabe" styleName="{style.button} bg-success text-white">ICH BIN FERTIG!</g:Button>

Now, when the User presses the button and the Checkbox is checked, then there will be a window-alert.

Button abgabe;
CheckBox answer;

@UiHandler("abgabe")
void check(ClickEvent e) {
    if (answer.isChecked()==true)
        Window.alert("HALLO");
}

But why it doesnt work?

question from:https://stackoverflow.com/questions/65882945/check-if-a-checkbox-is-checked

Answer 1

You forgot to mark your variables to be bound by the UiBinder. Just add @UiField annotations to both Button abgabe and CheckBox answer declarations, like this:

@UiField
Button abgabe;
@UiField
CheckBox answer;

BTW: answer.isChecked() is deprecated. Use answer.getValue() instead. And you don't have to compare boolean value with true in if clause. if(answer.getValue()) is good enough.