Java foundation 22 date class, calendar class, date format class

1  package com.dhb.code;
 2  
3  import java.text.ParseException;
 4  import java.text.SimpleDateFormat;
 5  import java.util.Calendar;
 6  import java.util.Date;
 7  
8  /* *
 9  * @author DSHORE /2018-5-2
 10  *
 11   */ 
12  /* 
13  * date(class): Date
 14  * 
 15  * calendar(class): Calendar
 16  * 
 17  * date format(class): SimpleDateFormat
 18  * */ 
19  public class Demo7 {
 20      public  static  void main(String[] args) throws ParseException {
 21          Date date = new Date(); // Create a Date object and get the current system time 
22 System.out          .println ( " Year: " +date. getYear()); // Obsolete 
23          
24          Calendar calendar = Calendar.getInstance();
 25 System.out          .println ( " Year: " +calendar.get ( Calendar.YEAR)); // Return value: 2018 
26System.out          .println ( " Month: " +(calendar.get (Calendar.MONTH)+ 1 )); // Return value: 5 27 System.out .println (          " Day: " + calendar.get ( Calendar.DATE )); // Return value: 2 28 System.out          .println ( " Hour: " +calendar.get ( Calendar.HOUR)); // Return value: 3    // 12-hour            system 29 System.out .println ( " time: "


+calendar.get (Calendar.HOUR_OF_DAY)); // Return value: 15    // 24-hour system          30 System.out .println ( " Minutes : " +calendar.get ( Calendar.MINUTE)); // Return value: 24 31 System.out          .println ( " Seconds: " +calendar.get ( Calendar.SECOND)); // Return value: 40 32 System.out .println (          " Milliseconds: " + calendar.get ( Calendar.MILLISECOND)); //


Return value: 119 1000 milliseconds = 1 second
 33          
34          // Display current system time: August 13, 2017 xx hours xx minutes xx seconds
 35              // Date format class: SimpleDateFormat 
36          Date date2 = new Date(); // Get Current system time 
37 System.out          .println (date2); // Return value: Wed May 02 09:24:40 CST 2018 38          SimpleDateFormat dateFormat = new SimpleDateFormat( " yyyy year MM month dd HH:mm:ss " );
 39          String time = dateFormat.format(date);
 40 System.out          .println ( "The current system time:
" +time); // Return value: current system time: May 02, 2018 09:24:40 
41          
42          String birthday = " December 26, 2000 11:29:30 " ;
 43          Date date3 = dateFormat.parse (birthday); // Note: The specified string format must be consistent with the format of SimpleDateFormat. 
44 System.out          .println ( date3 ); // Return value: Tue Dec 26 11:29:30 CST 2000 
45          
46          Date date4 = new Date();
 47          SimpleDateFormat dateFormat2 = new SimpleDateFormat( " MM, MM, DD, yyyy HH:mm:ss " );
 48         String time1 = dateFormat2.format(date4);
 49 System.out          .println ( " Current system time: " +time1); // Return value: Current system time: May 02, 2018 09:24:40 50 51          String birthday1 = " December 11, 2001 12:11:38 " ;
 52          Date d = dateFormat2.parse(birthday1);
 53 System.out          .println (d); // Return value: Tue Dec 11 12:11:38 CST 2001 54     }
 55 }
         

 

 

 

 

 

Original Author: DSHORE From: http://www.cnblogs.com/dshore123/ Welcome to reprint, reprint must indicate the source. ( If this article is useful to you, you can click Recommend , thank you! )