Map Operation --Zoom In, Zoom Out

RasterMap’s ZoomIn, ZoomOut are used to zoom in and zoom out the map.

public class MapZoomMIDP extends MapDemoMIDP implements CommandListener{     private Command mapZoomInCommand=new Command("Zoom In",Command.OK,1);     private Command mapZoomOutCommand=new Command("Zoom Out",Command.CANCEL,1);     public void startApp() {         init();         canvas.addCommand(mapZoomInCommand);         canvas.addCommand(mapZoomOutCommand);         canvas.setCommandListener(this);         GeoLatLng center = new GeoLatLng(32.0616667, 118.7777778);         map.setCenter(center, 13, MapType.MICROSOFTCHINA);         Display.getDisplay(this).setCurrent(canvas);     }      public void commandAction(Command c, Displayable d) {         if(c==mapZoomInCommand){             map.zoomIn();         }else if(c==mapZoomOutCommand){             map.zoomOut();         }     } }