public void addCommand ( Command command ) { if ( command == null ) throw new IllegalArgumentException ( ) ; if ( _frozen ) throw new IllegalStateException ( ) ; Command [ ] results = new Command [ _commands . length + 1 ] ; System . arraycopy ( _commands , 0 , results , 0 , _commands . length ) ; results [ _commands . length ] = command ; _commands = results ; }
Add a command to the chian .