Can I put JLabel array in JComboBox?

Here is the code. It runs but does not display the labels. Why?

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Combo implements ActionListener{
    JComboBox comboBox;
    JLabel i= new JLabel();
    JLabel[] items = new JLabel[4];
  public static void main(String[] args) {
    JFrame f = new JFrame("Interest Rate");
    Combo c=new Combo();
    f.setSize(300, 200);
    f.setLocation(200, 200);
    Container pane = f.getContentPane();
    c.items[0] = new JLabel("5.25");
    c.items[1] = new JLabel("5.5");
    c.items[2] = new JLabel("5.75");
    c.items[3] = new JLabel("6.0");
    c.create();
    c.comboBox.setEditable(true);
    BorderLayout brd = new BorderLayout();
    pane.setLayout(brd);
    pane.add(c.comboBox,BorderLayout.NORTH);
    pane.add(c.items[0],BorderLayout.CENTER);
    pane.add(c.i, BorderLayout.SOUTH);
    f.setVisible(true);
      }

public void actionPerformed(ActionEvent ae) {
    Object selection = comboBox.getSelectedItem();
     i.setText("User has selected interest rate " + selection + "%");
    }

private void create(){
    comboBox = new JComboBox(items);
    comboBox.addActionListener(this);
    }}