Swing/AWT/SWT :: Putting Text From Txt File Straight Into JComboBox

I have two classes - One is Read.java and the other is Display.java

Read.java looks like this

public static void main(String[]args){
File file = new File("test.txt");
try{
FileReader fr = new FileReader(file);
BufferedReader br = new BufferedReader(fr);

[Code] ....

Display.java looks like this:

public class Display extends JFrame {
private JComboBox comboBox;
private JPanel contentPane;

/**
* Launch the application.
*/
public static void main(String[] args) {
//method call to access other class

[Code] ....

Instead of having it so it displays the id's to the console,is there a way I can set it straight up to the combo box?