Assume that the TimerListener class implements the ActionListener interface.If the actionPerformed method in TimerListener needs to be executed once per second, what statement should be used to complete the following code segment?
A)Timer timer = new Timer(listener);
B)Timer timer = new Timer(1000, listener);
C)Timer timer = new Timer(1, listener);
D)Timer timer = new Timer(100, listener);

Question

Assume that the TimerListener class implements the ActionListener interface.If the actionPerformed method in TimerListener needs to be executed once per second, what statement should be used to complete the following code segment?  
A)Timer timer = new Timer(listener); 
B)Timer timer = new Timer(1000, listener); 
C)Timer timer = new Timer(1, listener); 
D)Timer timer = new Timer(100, listener);

Quizplus · Accepted Answer

In order to execute the actionPerformed method once per second, we need to use a Timer object that repeats the action every 1000 milliseconds (1 second). Option B creates a Timer object that takes in two parameters - the first parameter specifies the delay before the first action is executed (which we don't need to specify as 0 is the default), and the second parameter is the ActionListener object (in this case, listener). Therefore, option B is the best choice.

Assume That the TimerListener Class Implements the ActionListener Interface