用多线程实现两行文字的移动

				import java.awt.event.*;
				import java.awt.*;
				public class TickerTest extends Frame
				{  private Ticker ticker=new Ticker("testing the ticker tape class");
				 // private Ticker2 ticker2=new Ticker2("testing the ticker tape class");
					
				public TickerTest()
				{  
				setLayout(new BorderLayout());
				add("North",ticker);
				//add("South",ticker2);
				addWindowListener(new WindowAdapter()
				{public void windowClosing(WindowEvent we)
				{System.exit(0);}
				});
				setSize(300,200);
				show();
				
				}
				
				
				public static void main(String[] args)
				{TickerTest aa=new TickerTest();
				}
				}