question: returns the currently valid instance of the scheduler . concode_field_sep Timer timer concode_elem_sep Scheduler singleton concode_field_sep void reschedule concode_elem_sep void reschedule concode_elem_sep void scheduleAtFixedRate concode_elem_sep void scheduleAtFixedRate concode_elem_sep void schedule concode_elem_sep void schedule concode_elem_sep void schedule concode_elem_sep void schedule
target: Scheduler function ( ) { if ( singleton == null ) singleton = new Scheduler ( ) ; return singleton ; }