Java JComboBox create from DefaultComboBoxModel

import java.awt.FlowLayout;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;

class Demo extends JPanel {
  public Demo() {

    String options[] = { "CSS", "HTML", "Java", "Javascript" };
    setLayout(new FlowLayout());
    /* w  w w .  j a  v a 2s . c  o m*/
    JComboBox<String> jcb = new JComboBox<String>();
    DefaultComboBoxModel<String> model = new DefaultComboBoxModel<>(options);
 
    jcb.setModel(model);
    add(jcb);
    jcb.setSelectedIndex(1);
  }
}

public class Main {
  public static void main(String[] args) {
    Demo panel = new Demo();
    JFrame application = new JFrame();
    application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    application.add(panel);
    application.setSize(250, 250);
    application.setVisible(true);
  }
}