import java.awt.*;import java.awt.event.*;public class ListDemo extends Frame {    List lst;     Label label;    public ListDemo(String title){    	super(title);    }        public void creat() {        lst = new List(4,true);  //創建下拉式列表。        lst.add("First");        lst.add("Second");        lst.add("Third");        lst.add("Fourth");        add(lst);         addWindowListener(new WindowAdapter(){        	public void windowClosing(WindowEvent e){        		System.exit(0);        	}        }); 		pack();        setVisible(true);    }     public static void main(String[] args){   		ListDemo lt = new ListDemo("List");   		lt.creat();   	}}