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

public class AddAComboBox
{
  public AddAComboBox ()
  {
    JFrame frame = new JFrame("Add A Combo Box");
    frame.setSize(300,300);
    
    Container content = frame.getContentPane();
    content.setLayout(new FlowLayout());

    JComboBox cb1 = new JComboBox();
    cb1.addItem("apple");
    cb1.addItem("banana");
    cb1.addItem("grapes");
    content.add(cb1);

    JComboBox cb2 = new JComboBox();
    cb2.addItem("ape");
    cb2.addItem("bonobo");
    cb2.addItem("gibbon");
    cb2.setEditable(true);
    content.add(cb2);
        
    frame.setVisible(true);
  }
  
  public static void main(String[] args)
  {
    new AddAComboBox();
  }
}