java显示当前的系统时间

import java.awt.*; 
import java.applet.Applet; 
import java.util.Calendar; 
 
public class Ex4_1 extends Applet 
{ 
 Calendar now; 
 private String s1; 
 private int size,color; 
  
 public void init() 
 { 
  now=Calendar.getInstance();  //获得系统当前时间 
  s1=now.get(now.HOUR)+"时" 
  +now.get(now.MINUTE)+"分" 
  +now.get(now.SECOND)+"秒"; 
  size=Integer.parseInt(getParameter("size"));//获得字体大小 
  color=Integer.parseInt(getParameter("color"),16); //获得颜色值 
 } 
  
 public void paint(Graphics g) 
 { 
  Color c=new Color(color); 
  g.setColor(c); 
  Font f=new Font("",1,size); 
  g.setFont(f); 
  g.drawString(s1,10,50);   //显示指定大小颜色的字符串 
 } 
}