java.util.Calendar的用法--java基础

import java.util.*;

public class ShowDate {

public static void main(String args) { 
Date trialTime = new Date(); 

// print out a bunch of interesting things 
System.out.println("YEAR: " + calendar.get(Calendar.YEAR)); 
System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR)); 
System.out.println("DATE: " + calendar.get(Calendar.DATE)); 
System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR)); 
System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
System.out.println("HOUR: " + calendar.get(Calendar.HOUR)); 
System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE)); 
System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND)); 
System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000)));

System.out.println("Current Time, with hour reset to 3"); 
calendar.set(Calendar.HOUR, 3); 
System.out.println("YEAR: " + calendar.get(Calendar.YEAR)); 
System.out.println("WEEK_OF_YEAR: " + calendar.get(Calendar.WEEK_OF_YEAR)); 
System.out.println("DATE: " + calendar.get(Calendar.DATE)); 
System.out.println("DAY_OF_YEAR: " + calendar.get(Calendar.DAY_OF_YEAR)); 
System.out.println("DAY_OF_WEEK_IN_MONTH: " + calendar.get(Calendar.DAY_OF_WEEK_IN_MONTH));
System.out.println("HOUR: " + calendar.get(Calendar.HOUR)); 
System.out.println("MINUTE: " + calendar.get(Calendar.MINUTE)); 
System.out.println("MILLISECOND: " + calendar.get(Calendar.MILLISECOND)); 
System.out.println("DST_OFFSET: " + (calendar.get(Calendar.DST_OFFSET)/(60*60*1000))); // in hours 

}