You must create a timer class instance to use the timer's functions. Add the following code to the Java file:timer = new Timer (countdown, this);Notice the "countdown" variable is used.

Create the Java string variable. You can create the variable anywhere in your source code file, but the variable is typically created at the beginning of your Java function.

This Java recursion tutorial shows you how to create a recursive Java factorial function and compares these methods to iterative ones.