How to use a comboBox selection to change the information in the second comboBox

Question

I have created 2 comboBoxes.

The 1st comboBox drop down is created based on a radioButton selection.

The 2nd comboBox drop down list is decided based on the selection made in the 1st comboBox.

The first comboBox pulls its list from a column within one of my SQLite tables.

How can I get the the first comboBox's selection (which is the category column in the table) to cross-reference the selection ID (Cat_ID)?

Example table_1:

Cat_ID Category 1. Test1 2. Test2

In the 2nd comboBox, I want to listen for a selection to be made in the 1st comboBox. Then take the 1st comboBox selection ID (Cat_ID) to query my SQLite database for all entries with the matching ID number on a second table and list them in the 2nd comboBox.

Hopefully this makes sense.

Here is the first comboBox code:

radioButton_1.addMouseListener(new MouseAdapter() {
        @Override
        public void mouseClicked(MouseEvent arg0) {
            try{
                con = DriverManager.getConnection("jdbc:sqlite:WB.db");
                con.setAutoCommit(false);

                stmt = con.createStatement();
                String s = "SELECT * FROM Categories;";
                rs = stmt.executeQuery(s);

                while(rs.next()){
                comboBox.removeItem(rs.getString(2));
                comboBox.addItem(rs.getString(3));
        }
            }
            catch (SQLException e){
                JOptionPane.showMessageDialog(null, "didnt pull from database");
            }finally{
                try{
                    stmt.close();
                    rs.close();
                    con.close();
                }catch (Exception e){
                    JOptionPane.showMessageDialog(null, "ERROR CLOSE");
                }
        }
        }
    });