Java中的Calendar类

Calendar类是一个抽象类，使用getInstance方法创建

Calendar c2 = Calendar.getInstance(); 

//年份 

int year = c2.get(Calendar.YEAR); 
//月份 
int month = c2.get(Calendar.MONTH) + 1; 
//日期 
int date = c2.get(Calendar.DATE); 
//小时 
int hour = c2.get(Calendar.HOUR_OF_DAY); 
//分钟 
int minute = c2.get(Calendar.MINUTE); 
//秒 

int second = c2.get(Calendar.SECOND);

实例：

 public class class6_9

            {

                  public static void main(String args[])

                  {

                         Calendar c1=Calendar.getInstance();

                         c1.setTime(new Date());

                         int year=c1.get(Calendar.YEAR);

                         int month=c1.get(Calendar.MONTH)+1;

                         int date=c1.get(Calendar.DATE);

                         int hour=c1.get(Calendar.HOUR);

                         int minute=c1.get(Calendar.MINUTE);

                         int second=c1.get(Calendar.SECOND);

 

                         System.out.println("当前系统时间为："+year+"年"+month+"月"+date+"日  "+hour+"小时"+minute+

                                                      "分"+second+"秒");

 

                         Calendar c2=Calendar.getInstance();

                         c2.set(1988,3,23);   //实际时间：1988年04月23日

 

                         long n=c1.getTimeInMillis()-c2.getTimeInMillis();

                         System.out.println("从我出生到现在走过的时间为："+n+"毫秒");

                  }

            }

运行以后的结果为

2010年2月6日

从我出生到现在走过的时间为687661200000毫秒