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//fxml
 
 <TableColumn text="Image"  prefWidth="100">
                        <cellValueFactory>
                            <PropertyValueFactory property="image" />
                        </cellValueFactory>
                            <cellFactory>
                            </cellFactory>
                    </TableColumn>
 
//controller
 @FXML
    private void handleButtonActionSearch(ActionEvent event) {
 
    image.setCellFactory(new 
        Callback<TableColumn<BoardThread,BoardThread>,TableCell<BoardThread,BoardThread>>(){ 
 
        @Override
        public TableCell<BoardThread, BoardThread> call(TableColumn<BoardThread, BoardThread> p) {
 
            TableCell<BoardThread, BoardThread> cell = new TableCell<BoardThread, BoardThread>(){
 
            @Override
            public void updateItem(BoardThread item, boolean empty) {                        
                if(item!=null){                            
                    HBox box= new HBox();
                    box.setSpacing(10) ;
                    ImageView imageview = new ImageView();
                    imageview.setFitHeight(50);
                    imageview.setFitWidth(50);
                    imageview.setImage(new Image("img/" + item.getImage())); 
 
                    box.getChildren().addAll(imageview); 
                    //SETTING ALL THE GRAPHICS COMPONENT FOR CELL
                    setGraphic(box);
                }
            }
            };
 
            return cell;
        }
});
//model
 
public class BoardThread {
 
   private final SimpleStringProperty image = new SimpleStringProperty("");
 
 
public BoardThread() {
        this("");
    }
 
    public BoardThread(String image) {
 
        setImage(image);
 
    }
 
 
    /* setting images */
 
    public String getImage() {
        return image.get();
    }
 
    public void setImage(String ffavoriteImage) {
        this.image.set(ffavoriteImage);
    }
 
}
 
 
 

Main.java:3: error: class, interface, or enum expected
 <TableColumn text="Image"  prefWidth="100">
 ^
Main.java:13: error: class, interface, or enum expected
    private void handleButtonActionSearch(ActionEvent event) {
            ^
Main.java:19: error: class, interface, or enum expected
        public TableCell<BoardThread, BoardThread> call(TableColumn<BoardThread, BoardThread> p) {
               ^
Main.java:24: error: class, interface, or enum expected
            public void updateItem(BoardThread item, boolean empty) {                        
                   ^
Main.java:27: error: class, interface, or enum expected
                    box.setSpacing(10) ;
                    ^
Main.java:28: error: class, interface, or enum expected
                    ImageView imageview = new ImageView();
                    ^
Main.java:29: error: class, interface, or enum expected
                    imageview.setFitHeight(50);
                    ^
Main.java:30: error: class, interface, or enum expected
                    imageview.setFitWidth(50);
                    ^
Main.java:31: error: class, interface, or enum expected
                    imageview.setImage(new Image("img/" + item.getImage())); 
                    ^
Main.java:33: error: class, interface, or enum expected
                    box.getChildren().addAll(imageview); 
                    ^
Main.java:35: error: class, interface, or enum expected
                    setGraphic(box);
                    ^
Main.java:36: error: class, interface, or enum expected
                }
                ^
Main.java:40: error: class, interface, or enum expected
            return cell;
            ^
Main.java:41: error: class, interface, or enum expected
        }
        ^
14 errors

Standard output is empty