In javafx table view doesn't display - javafx

Question

//Database is Sucessfully Connected
I am trying to Create a table in which I want to display the contents of my 'student' table in tableView of Javafx but I could not get the desired output.
ObservableList<Student> list = FXCollections.observableArrayList();
#FXML
//Initializes the controller class.
#Override
public void initialize(URL url, ResourceBundle rb)
{
// TODO
initCol();
loadTable();
}
//A view Table has been made with fx:id-table
//Variable name for 2 columns are 'fx:id-rollnoColand' & 'fx:id-nameCol'
#FXML
private TableView<Student> table;
#FXML
private TableColumn<Student,String> rollnoCol;
#FXML
private TableColumn<Student,String> nameCol;
private void initCol()
{
rollnoCol.setCellValueFactory(new PropertyValueFactory<>("s_rollno"));
nameCol.setCellValueFactory(new PropertyValueFactory<>("s_name"));
}
//Name of the Table is 'student' with Columns 'rollno' and 'name'
private void loadTable()
{
String selectAll = "select * from student";
try
{
Statement stmt = connectdb.createStatement();
ResultSet rs = stmt.executeQuery(selectAll);
while(rs.next())
{
String getrollno = rs.getString("rollno");
String getname = rs.getString("name");
list.add(new Student(getrollno,getname));
}
}
catch(SQLException exp)
{
System.out.println(exp);
}
table.getItems().setAll(list);
}
public static class Student
{
private final String s_rollno;
private final String s_name;
Student(String rollno,String name)
{
this.s_rollno = rollno;
this.s_name = name;
}
}

Answer 1

PropertyValueFactory works with getters or property methods. In your case you need to add getters for your properties in the Student class to enable PropertyValueFactory to retrieve the values:
public static class Student {
private final String s_rollno;
private final String s_name;
Student(String rollno, String name) {
this.s_rollno = rollno;
this.s_name = name;
}
public String getS_rollno() {
return s_rollno;
}
public String getS_name() {
return s_name;
}
}

Answer 2

I had this problem before,and it has many reason.First ,you may remove final keyword from your model,because your variables are changing.Second, TableView shows empty cells because you make your variables private in class Student and you can not access them from init method in parent class.So you need add getter and setter methods for access to these variables.
public static class Student
{
private String s_rollno;
private String s_name;
Student(String rollno,String name)
{
this.s_rollno = rollno;
this.s_name = name;
}
public String getS_rollno() {
return s_rollno;
}
public void setS_rollno(String s_rollno) {
this.s_rollno = s_rollno;
}
public String getS_name() {
return s_name;
}
public void setS_name(String s_name) {
this.s_name = s_name;
}
}