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Does it go away and a new one comes immediately?
To keep the Timer from continuing to call the listener, stop or cancel it.

Sorry, that's a message from the IDE, but it hides what the compiler error is. You need to try another way to get the compiler's error message.

The code in post#5 shows a call to the JOptionPane method inside an if.



if (count ==0){

JOptionPane.showMessageDialog(null, "You loose",...

What happened when you tried as in post#5?

What happened when you used that code?

What line of code is changing the value of the "timer"?

++ means to add 1
-- means to subtract 1

The Timer will call your listener code at the frequency/interval that the code sets.
You can have that code do whatever you need done when it is called.

If you want to see when the listener is...