Display image in table - javafx-2

Question

I am trying to insert an image into table view in JavafX. Here is how I set up my table view:
TableColumn prodImageCol = new TableColumn("IMAGES");
prodImageCol.setCellValueFactory(new PropertyValueFactory<Product, Image>("prodImage"));
prodImageCol.setMinWidth(100);
// setting cell factory for product image
prodImageCol.setCellFactory(new Callback<TableColumn<Product,Image>,TableCell<Product,Image>>(){
#Override
public TableCell<Product,Image> call(TableColumn<Product,Image> param) {
TableCell<Product,Image> cell = new TableCell<Product,Image>(){
public void updateItem(Product item, boolean empty) {
if(item!=null){
ImageView imageview = new ImageView();
imageview.setFitHeight(50);
imageview.setFitWidth(50);
imageview.setImage(new Image(product.getImage()));
}
}
};
return cell;
}
});
viewProduct.setEditable(false);
viewProduct.getColumns().addAll(prodImageCol, prodIDCol, prodNameCol, prodDescCol, prodPriceCol, col_action);
viewProduct.getItems().setAll(product.populateProductTable(category));
private SimpleObjectProperty prodImage;
public void setprodImage(Image value) {
prodImageProperty().set(value);
}
public Object getprodImage() {
return prodImageProperty().get();
}
public SimpleObjectProperty prodImageProperty() {
if (prodImage == null) {
prodImage = new SimpleObjectProperty(this, "prodImage");
}
return prodImage;
}
And this is how I retrieve the image from database:
Blob blob = rs.getBlob("productImage");
byte[] data = blob.getBytes(1, (int) blob.length());
bufferedImg = ImageIO.read(new ByteArrayInputStream(data));
image = SwingFXUtils.toFXImage(bufferedImg, null);
However I am getting error at the setting up of table view: imageview.setImage(new Image(product.getImage()));
The error message as:
no suitable constructor found for Image(Image)
constructor Image.Image(String,InputStream,double,double,boolean,boolean,boolean) is not applicable
(actual and formal argument lists differ in length)
constructor Image.Image(int,int) is not applicable
(actual and formal argument lists differ in length)
constructor Image.Image(InputStream,double,double,boolean,boolean) is not applicable
(actual and formal argument lists differ in length)
constructor Image.Image(InputStream) is not applicable
(actual argument Image cannot be converted to InputStream by method invocation conversion)
constructor Image.Image(String,double,double,boolean,boolean,boolean) is not applicable
(actual and formal argument lists differ in length)
constructor Image.Image(String,double,double,boolean,boolean) is not applicab...
I did managed to retrieve and display an image inside an image view but however, I can't display it in table column. Any help would be appreciated. Thanks in advance.

Answer 1

The problem that's causing the exception is that your method product.getImage() is returning an javafx.scene.Image. There's no need to do anything else at this point: You have an image, so use it (before you were trying to construct new Image(Image) - which is not even possible). This is what you want to be using:
imageview.setImage(product.getImage());
Your second problem is that while you're creating an ImageView every time you update the cell, you're not doing anything with it. Here's your original code:
TableCell<Product,Image> cell = new TableCell<Product,Image>(){
public void updateItem(Product item, boolean empty) {
if(item!=null){
ImageView imageview = new ImageView();
imageview.setFitHeight(50);
imageview.setFitWidth(50);
imageview.setImage(new Image(product.getImage()));
}
}
};
return cell;
Like #tomsontom suggested, I'd recommend using setGraphic(Node) to attach your ImageView to the TableCell. So you might end up with something like this:
//Set up the ImageView
final ImageView imageview = new ImageView();
imageview.setFitHeight(50);
imageview.setFitWidth(50);
//Set up the Table
TableCell<Product,Image> cell = new TableCell<Product,Image>(){
public void updateItem(Product item, boolean empty) {
if(item!=null){
imageview.setImage(product.getImage()); //Change suggested earlier
}
}
};
// Attach the imageview to the cell
cell.setGraphic(imageview)
return cell;
The first point #tomsontom was making is that your method of creating an Image is a little roundabout. Sure, it seems to work... but there's a simpler way. Originally you were using:
bufferedImg = ImageIO.read(new ByteArrayInputStream(data));
image = SwingFXUtils.toFXImage(bufferedImg, null);
But a better way of doing it would be switching those lines with:
image = new Image(new ByteArrayInputStream(data));

Answer 2

why are not creating the Image directly from the data new Image(new ByteArrayInputStream(data)) no need to rewrap it our use Swing stuff
I don't see a public Image(Object) constructor in FX8 - why passing it anyways if you are already have an image instance?
you need to set the ImageView on the cell with setGraphic()