how to test countdown timer in android studio code example

Example 1: android studio timers

Timer()
Creates a new timer.

Timer(boolean isDaemon)
Creates a new timer whose associated thread may be specified to Thread#setDaemon.

Timer(String name)
Creates a new timer whose associated thread has the specified name.

Timer(String name, boolean isDaemon)
Creates a new timer whose associated thread has the specified name, and may be specified to Thread#setDaemon.

Example 2: android studio timers

public Timer ()