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NullPointerException – when the task or time is null.

The Java Timer class throws the below exceptions while scheduling tasks: Period - interval with which task has to be executed Timer Exceptions Period - interval with which task has to be executed void scheduleAtFixedRate(TimerTask task,long delay,long period) Schedules a specific task for repeated fixed rate execution after the specified delay with the mentioned periodic interval task - task to be performed Period - interval with which task has to be executed vois scheduleAtFixedRate(TimerTask task, Date firsttime, long period) Schedules a specific task with fixed rate execution starting with the specific date with the mentioned periodic intervals task - task to be performed Period - interval with which task has to be executed void schedule(TimerTask task, long delay, long period) Schedules a specific task for repeated execution after the specified delay with the mentioned periodic interval task - task to be performedĭelay - delay in milliseconds before task execution Time - time at which task has to be performed void schedule(TimerTask task,long delay) Schedules a specified task after the specified delay task - task to be performedĭelay - delay in milliseconds before task execution void schedule(TimerTask task, Date firsttime, long period) Schedules a specific task on the specific start for repeated execution with the mentioned periodic interval task - task to be performedįirstime - start time of the task for the execution If the time is past, then it is immediately taken for execution task - task to be performed void schedule(TimerTask task, Date time) Schedules the specified task to run at the specified time. It cancels all the scheduled tasks except the current running task if any int purge() This removes all the cancelled tasks from the queue and returns the number of tasks removed. Method Description Parameters void cancel() Terminates the timer.

We can create Timer object using the below constructors Constructor Description Timer() This is the default timer Timer(boolean isDaemon) This creates a timer with its associated thread to run as a daemon Timer(String name) This creates a timer with its associated thread with the specified name Timer(String name, boolean isDaemon) This creates a timer with its associated thread with specified name and can be run as a daemon Timer t = new Timer() Java Timer Methodsīelow are the most commonly used Java Timer methods.