simpledateformatdemo.java

java tutorial.sun公司官方出品。java入门书籍。最新版

/*
 * Copyright (c) 1995 - 2008 Sun Microsystems, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Sun Microsystems nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */ 


import java.util.*;
import java.text.*;

public class SimpleDateFormatDemo {

   static public void displayDate(Locale currentLocale) {

      Date today;
      String result;
      SimpleDateFormat formatter;

      formatter = new SimpleDateFormat("EEE d MMM yy", currentLocale);
      today = new Date();
      result = formatter.format(today);

      System.out.println("Locale: " + currentLocale.toString());
      System.out.println("Result: " + result);
   }


   static public void displayPattern(String pattern, Locale currentLocale) {

      Date today;
      SimpleDateFormat formatter;
      String output;

      formatter = new SimpleDateFormat(pattern, currentLocale);
      today = new Date();
      output = formatter.format(today);

      System.out.println(pattern + "   " + output);
   }

   static public void main(String[] args) {

      Locale[] locales = {
          new Locale("fr","FR"),
          new Locale("de","DE"),
          new Locale("en","US")
      };

      for (int i = 0; i < locales.length; i++) {
         displayDate(locales[i]);
         System.out.println();
      }

      String[] patterns = {
         "dd.MM.yy",
         "yyyy.MM.dd G 'at' hh:mm:ss z",
         "EEE, MMM d, ''yy",
         "h:mm a",
         "H:mm",
         "H:mm:ss:SSS",
         "K:mm a,z",
         "yyyy.MMMMM.dd GGG hh:mm aaa"
      };

      for (int k = 0; k < patterns.length; k++) {
         displayPattern(patterns[k], new Locale("en","US"));
         System.out.println();
      }

      System.out.println();
   }
}