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