DateFormatによる日付の整形

	public static void main(String[] args) {
		Date d = new Date();
		DateFormat df = DateFormat.getInstance();
		System.out.println(df.format(d));
		df = DateFormat.getDateInstance();
		System.out.println(df.format(d));
		df = DateFormat.getTimeInstance();
		System.out.println(df.format(d));
		df = DateFormat.getDateTimeInstance();
		System.out.println(df.format(d));
	}
実行結果
11/09/04 19:58
2011/09/04
19:58:33
2011/09/04 19:58:33