Insert an Item to JComboBox in Java

import java.awt.BorderLayout;
/* ww w .ja v a  2  s. c om*/
import javax.swing.JComboBox;
import javax.swing.JFrame;

public class Main {

  public static void main(String args[]) {
    String labels[] = { "A", "B", "C", "D", "E", "F" };
    JFrame frame = new JFrame("Selecting JComboBox");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JComboBox comboBox = new JComboBox(labels);
    frame.add(comboBox, BorderLayout.SOUTH);


    comboBox.insertItemAt("java2s.com", 0);

    frame.setSize(400, 200);
    frame.setVisible(true);
  }
}