package com.util;  import java.text.DateFormat; import java.util.Calendar; import java.util.Date;   public class Test {  public void getTimeByDate(){   Date date = new Date();   DateFormat df1 = DateFormat.getDateInstance();//日期格式，精確到日   System.out.println(df1.format(date));   DateFormat df2 = DateFormat.getDateTimeInstance();//可以精確到時(shí)分秒   System.out.println(df2.format(date));   DateFormat df3 = DateFormat.getTimeInstance();//只顯示出時(shí)分秒   System.out.println(df3.format(date));   DateFormat df4 = DateFormat.getDateTimeInstance(DateFormat.FULL,DateFormat.FULL); //顯示日期，周，上下午，時(shí)間（精確到秒）   System.out.println(df4.format(date));   DateFormat df5 = DateFormat.getDateTimeInstance(DateFormat.LONG,DateFormat.LONG); //顯示日期,上下午，時(shí)間（精確到秒）   System.out.println(df5.format(date));   DateFormat df6 = DateFormat.getDateTimeInstance(DateFormat.SHORT,DateFormat.SHORT); //顯示日期，上下午,時(shí)間（精確到分）   System.out.println(df6.format(date));   DateFormat df7 = DateFormat.getDateTimeInstance(DateFormat.MEDIUM,DateFormat.MEDIUM); //顯示日期，時(shí)間（精確到分）   System.out.println(df7.format(date));  }  public void getTimeByCalendar(){   Calendar cal = Calendar.getInstance();   int year = cal.get(Calendar.YEAR);//獲取年份   int month=cal.get(Calendar.MONTH);//獲取月份   int day=cal.get(Calendar.DATE);//獲取日   int hour=cal.get(Calendar.HOUR);//小時(shí)   int minute=cal.get(Calendar.MINUTE);//分      int second=cal.get(Calendar.SECOND);//秒   int WeekOfYear = cal.get(Calendar.DAY_OF_WEEK);//一周的第幾天   System.out.println("現(xiàn)在的時(shí)間是：公元"+year+"年"+month+"月"+day+"日  "+hour+"時(shí)"+minute+"分"+second+"秒  星期"+WeekOfYear);  }  public static void main(String[] args) {   Test t=new Test();   t.getTimeByDate();   System.out.println("****************************");   t.getTimeByCalendar();  } }

public static void main(String[] as) throws Exception {  int j;  Calendar cc = Calendar.getInstance();  int myYear = cc.get(Calendar.YEAR);  int myMonth = cc.get(Calendar.MONTH);  j=cc.get(Calendar.DATE)>16?3:2;  cc.set(Calendar.MONTH, myMonth+j);  System.out.println(myYear+"-"+cc.get(cc.MONTH));  for(int i=0;i<7;i++){   cc.add(cc.MONTH, 1);   int mm = cc.get(cc.MONTH);   int mmm=mm==0?12:mm;   System.out.println(myYear+"-"+mmm);  } }