Using an anonymous inner class for User Info column's cell factory. Associated blog post: https://blogs.oracle.com/javajungle/entry/how_to_pretty_up_your

gistfile1.txt

    userInfoCol.setCellFactory(new Callback<TableColumn<MTweet, MUser>, 
        TableCell<MTweet, MUser>>() {
	@Override
	public TableCell<MTweet, MUser> call(TableColumn<MTweet, MUser> param) {
	    return new TableCell<MTweet, MUser>() {
		VBox vb;
		Label userName;
		Label screenName;
		ImageView imgVw;

		{
		    vb = new VBox();
		    vb.setAlignment(Pos.CENTER);
		    userName = new Label();
		    screenName = new Label();
		    imgVw = new ImageView();
		    imgVw.setFitHeight(50);
		    imgVw.setFitWidth(50);
		    vb.getChildren().addAll(imgVw, userName, screenName);
		    setGraphic(vb);
		}

		@Override
		public void updateItem(MUser item, boolean empty) {
		    if (item != null) {
			userName.setText(item.name());
			screenName.setText("@" + item.screenName());
			imgVw.setImage(item.icon());
		    }
		}
	    };
	}
    });