java日期格式的月和日的固定长度？

Question

有没有办法将Date对象的格式设置为固定的日和月长度，以便在列中保持良好的对齐？ 例如：

15 May      2010
10 January  2010

而不是

15 May 2010
10 January 2010

谢谢

Answer 1

看看java.util.Formatter类，它的format方法与String相同。格式（…）和系统类似。出来printf

例如：

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

public class FormatDateCalendar {
   public static final String FORMAT_STRING = "%1$-3td %1$-9tB %1$tY";
   public static void main(String[] args) {
      Calendar c1 = new GregorianCalendar(2011, Calendar.FEBRUARY, 3);
      Calendar c2 = new GregorianCalendar(2010, Calendar.MAY, 15);
      Date today = new Date();

      System.out.printf(FORMAT_STRING + "%n", c1);
      System.out.printf(FORMAT_STRING + "%n", c2);
      System.out.printf(FORMAT_STRING + "%n", today);
   }
}