public void run ( ) { /* check if running the routine is still necessary */ if ( shutDownHookExecuted ) { return ; } synchronized ( processes ) { running = true ; Enumeration e = processes . elements ( ) ; while ( e . hasMoreElements ( ) ) { destroy ( ( Process ) e . nextElement ( ) ) ; } processes . clear ( ) ; shutDownHookExecuted = true ; } }
Invoked by the VM when it is exiting .