title: JavaFX tableview Filtering by combobox selected item
body: <p>I'm noob in javafx and scene builder. I want to populate tableview by selecting one item from combobox. It is possible? </p>
  
  <p>i try with String val = combobox.getValue() and i put the string in SQL query in preparedStatement for directly sort but app stops at the null string value and tableview is not updated.</p>
  
  <p>Thank you guys!</p>