java中有关日期的显示问题

  import java.util.*;
  import java.text.*;
  public class StyleDemo{
  public static void main(String[]args){
  Date now=new Date();
  DateFormat df=DateFormat.getDateInstance();
  DateFormat df1=DateFormat.getDateInstance(DateFormat.SHORT);
  DateFormat df2=DateFormat.getDateInstance(DateFormat.MEDIUM);
  DateFormat df3=DateFormat.getDateInstance(DateFormat.LONG);
  DateFormat df4=DateFormat.getDateInstance(DateFormat.FULL);
  String s=df.format(now);
  String s1=df1.format(now);
  String s2=df2.format(now);
  String s3=df3.format(now);
  String s4=df4.format(now);
  System.out.println("(Default)Today is"+s);
  System.out.println("(SHORT)Today is"+s1);
  System.out.println("(MEDIUM)Today is"+s2);
  System.out.println("(LONG)Today is"+s3);
  System.out.println("(FULL)Today is"+s4);
  }
  }
  That program output the following:
  (Default)Today is Nov 8,2000
  (SHORT)Today is 11/8/00
  (MEDIUM)Today is Nov 8,2000
  (LONG)Today is November 8,2000
  (FULL)Today is Wednesday,November 8,2000