public UpdateEmployeeUi(Employee e) {
        setTextFields(e);
}

public void setTextFields(Employee e) {
        textFieldName.setText(e.getName());
        textFieldAddress.setText(e.getAddress());
        textFieldZip.setText(e.getZip());
        textFieldCity.setText(e.getCity());
        textFieldPhone.setText(e.getPhone());
        textFieldEmail.setText(e.getEmail());
        textFieldHours.setText(String.valueOf(e.getHours()));
        textFieldSalary.setText(String.valueOf(e.getSalary()));
        textFieldBank.setText(String.valueOf(e.getBank()));
        int i = 0;
        boolean found = false;
        while (!found) {
            if (employeeController.findDepartment().get(i).getName().equalsIgnoreCase(e.getDepartmentName())) {
                found = true;
                i--;
            }
            i++;
        }
        comboBox.setSelectedIndex(i);
    }

JButton btnOpdaterMedarbejder = new JButton("Opdater Medarbejder");
            btnOpdaterMedarbejder.addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    Employee ep = employeeList.getSelectedValue();
                    UpdateEmployeeUi updateEmployeeUi = new UpdateEmployeeUi(ep);
                    updateEmployeeUi.setVisible(true);
                }
            });