ImageShow1.java

 import javafx.application.Application;
 import javafx.scene.Group;
 import javafx.scene.Scene; 
 import javafx.stage.Stage;
 import javafx.scene.paint.Color;
 import java.util.List;


 public class ImageShow1 extends Application {
 
     @Override public void start(Stage stage) {
         // load the image
	 String file1 = "bld.jpg";
	 List<String> args = getParameters().getRaw();
	 String filename =  (args.size()>0)? args.get(0): file1;

	 showImage show1 = new showImage(filename);

	 show1.setStage(stage);
	 stage.setX(100);
	 stage.setY(100);
    	double wd = stage.getWidth();
    	double ht = stage.getHeight();
	System.out.println("size " + wd + " x " + ht);

     }

     public static void main(String[] args) {
         Application.launch(args);
     }
}