javafx table view is not showing any data from database - javafx

Question

I created a book management application via javafx. Through this app we can perform add, search and delete operations. For the search i am using Table view to get all the details of the book searched by the user. So in the end i am getting the result displayed in the console but not in the table view
package Managemnet;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import connection.*;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.layout.AnchorPane;
public class Searching {
Connection connect;
#FXML
TableView<Book> search_view ;
#FXML
ObservableList<Book> observeList;
#FXML
TableColumn<Book, Integer> Book_I;
#FXML
TableColumn<Book, String> Book_n;
#FXML
TableColumn<Book, String> publish;
#FXML
TableColumn<Book, Integer> ye;
#FXML
TextField sea_Book_name;
#FXML
TextField sea_pub;
#FXML
TextField sea_year;
#FXML
AnchorPane SearchPane;
#FXML
Button search;
public void search() throws ClassNotFoundException, SQLException{
Sql_query sql = new Sql_query();
sql.connect_sql();
connect = sql.getConnect();
observeList = FXCollections.<Book>observableArrayList();
search_view = new TableView<Book>();
Book_I=new TableColumn<Book ,Integer>();
Book_I.setCellValueFactory(new PropertyValueFactory<Book ,Integer>
("Book_id"));
Book_n=new TableColumn<Book ,String>();
Book_n.setCellValueFactory(new PropertyValueFactory<Book ,String>
("Book_name"));
publish=new TableColumn<Book ,String>();
publish.setCellValueFactory(new PropertyValueFactory<Book ,String>
("Publisher"));
ye=new TableColumn<Book ,Integer>();
ye.setCellValueFactory(new PropertyValueFactory<Book ,Integer>("year"));
String s1= sea_Book_name.getText();
String s2= sea_pub.getText();
String s= sea_year.getText();
int s3;
if(!s.isEmpty()){
s3=Integer.parseInt(s);
}
else s3=0;
ResultSet res;
Answer_from_dataset obj= new Answer_from_dataset();
res=obj.getAnswer(s1, s2, s3);
while(res.next()){
observeList.add(new Book(res.getInt(1), res.getString(2),
res.getString(3), res.getInt(4)));
//System.out.println(observeList);
}
search_view.setItems(observeList);
System.out.println(search_view);
}
package Managemnet;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
public class Book {
SimpleStringProperty Book_name;
SimpleStringProperty Publisher;
SimpleIntegerProperty Book_id;
SimpleIntegerProperty year;
public Book(int book_id, String book_name, String publisher, int year) {
this.Book_name =new SimpleStringProperty(book_name);
this.Publisher =new SimpleStringProperty(publisher);
this.Book_id =new SimpleIntegerProperty (book_id);
this.year = new SimpleIntegerProperty(year);
}
public String getBook_name() {
return Book_name.get();
}
public String getPublisher() {
return Publisher.get();
}
public Integer getBook_id() {
return Book_id.get();
}
public Integer getYear() {
return year.get();
}
public void setBook_name(String book_name) {
Book_name.set(book_name);
}
public void setPublisher(String publisher) {
Publisher.set(publisher);;
}
public void setBook_id(int book_id) {
Book_id.set(book_id);;
}
public void setYear(int year) {
this.year.set(year);;
}
#Override
public String toString() {
return getBook_id() + " " + getBook_name() + " " + getPublisher() + " "
+ getYear();
}
}

Answer 1

So I ran into this issue with FXML when I did my first project with JavaFX.
I tried a lot of solutions with FXML but it took time and nothing worked. So I shifted over to using POJO's. This may not be ideally what you're looking for but it would give you a pretty good amount of flexibility with creating your table.
Ideally for the table itself you want to create a TableView
TableView<Book> table = new TableView();
Then for each column you want to create a TableColumn.. Now here you need to be careful
TableColumn<Book, String> col1 = new TableColumn<>("Name");
col.setCellValueFactory(data -> new SimpleStringProperty(data.getValue().getName()));
The values within the angle brackets is <Object Type, Data Type>
And then of course you can set your preferred width and what not. But the same process of creating TableColumns Repeats itself for the table you have. I get this might be a little more of lengthier process but its relatively easy to understand and most importantly it work.
Try this and let me know if it works! Cheers!!