How to disable a button in java

Question

so i need a button to be unusable once the timer runs out and until the amount is reset, how do i do this?
@override
public void onFinish(){
timer.setText("0:00");
txtView2.setText("you're out of time");

}
im assuming i add the code in this class but i dont know what i would need to input

Answer 1

there is method in java which is buttonname.setEnabled(boolean); in that if you want to enable the button then write true in the place of boolean and if you disable the button then write false in the place of boolean