import javax.swing.*;

public class CheckComboList{
  public static void main(String args[]){
     JFrame frame=new JFrame("CheckComboList");
     frame.setSize(400,200);
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

     String[] data1={"choice 1","choice 2","choice 3","choice 4"};
     String[] data2={"select 1","select 2","select 3","select 4"};
     JComboBox combo=new JComboBox(data1);
     JList list=new JList(data2);
     JBox body=JBox.vbox(combo,JBox.vspace(20),list,JBox.vglue());
     frame.add(body);
     frame.setVisible(true);
  }
}