Date d=new Date();  //使用當(dāng)前日期和時(shí)間來處理
 Date d=new Date(long date);  //以基準(zhǔn)時(shí)間1970年1月1日經(jīng)過參數(shù)date指定的毫秒數(shù)

import java.util.Date;

public class dome2{
 	public static void main(String[] args) {
 	  Date d=new Date(1000000000);
 	  Date d1=new Date();
 	 //d1在d之后
 	  System.out.println(d1.after(d));
 	  //d在d1之前
 	  System.out.println(d.before(d1));
 	  //判斷d在d1的什么位置
 	  System.out.println(d.compareTo(d1));
 	  //判斷兩個(gè)對(duì)象相等
 	  System.out.println(d.equals(d1));
 	   //獲取當(dāng)前時(shí)間的毫秒數(shù)
 	 System.out.println(d1.getTime());
	}
}

public class dome2{
 	public static void main(String[] args) {
 	  int date=266600000;
 	  date/=1000;   //毫秒數(shù)轉(zhuǎn)化成秒
 	  int  day=date/86400;   //一天有86400秒，計(jì)算有多少天
 	  int  hour=date%86400/3600;   //一小時(shí)有3600秒，計(jì)算有多少個(gè)小時(shí)
 	  int  minute=date%86400%3600/60;  //一分鐘60秒，計(jì)算有多少分鐘
 	  int  second=date%86400%3600%60;  //計(jì)算最后的秒數(shù)
 	  System.out.println(day+"天 "+hour+"時(shí) "+minute+"分 "+second+"秒");
 	  
	}
}

Calendar c=Calendar.getInstance(); //獲得對(duì)象

import java.util.Calendar;

public class dome2{
 	public static void main(String[] args) {
        Calendar c=Calendar.getInstance();
        System.out.println("返回當(dāng)前時(shí)間:"+c.getTime());
        System.out.println("返回當(dāng)前年份:"+c.get(Calendar.YEAR));
        System.out.println("返回當(dāng)前月份:"+(c.get(Calendar.MONTH)+1));
        System.out.println("返回當(dāng)前的日"+c.get(Calendar.DATE));
        System.out.println("返回當(dāng)前星期幾:"+(c.get(Calendar.DAY_OF_WEEK)-1));
        System.out.println("返回當(dāng)前是一年中的第幾天:"+c.get(Calendar.DAY_OF_YEAR));
        System.out.println("返回當(dāng)前是一年中的第幾個(gè)星期:"+c.get(Calendar.WEEK_OF_YEAR));
        System.out.println("返回當(dāng)前是一個(gè)月中的第幾個(gè)星期:"+c.get(Calendar.WEEK_OF_MONTH));
        System.out.println("返回當(dāng)前的小時(shí)(十二小時(shí)制):"+c.get(Calendar.HOUR));
        System.out.println("返回當(dāng)前的小時(shí)(二十四小時(shí)制):"+c.get(Calendar.HOUR_OF_DAY));
        System.out.println("返回當(dāng)前是時(shí)間是多少分:"+c.get(Calendar.MINUTE));
        System.out.println("返回當(dāng)前時(shí)間的秒:"+c.get(Calendar.SECOND));
	}
}

public class dome2{
 	public static void main(String[] args) {
         Calendar c=Calendar.getInstance();
         c.set(2020,3,1,15,5,23);
         Date date=c.getTime();
         System.out.println(date);
         StringBuffer str=new StringBuffer();
         str.append(c.get(Calendar.YEAR)+"年");
         str.append(c.get(Calendar.MONTH)+"月");   //設(shè)定的月份不用加1
         str.append(c.get(Calendar.DATE)+"日");
         str.append(c.get(Calendar.HOUR)+"時(shí)");
         str.append(c.get(Calendar.MINUTE)+"分");
         str.append(c.get(Calendar.SECOND)+"秒");
         System.out.println(str.toString());
	}
}

DateFormat d=DateFormat.getInstance();  //創(chuàng)建對(duì)象

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;

public class dome2{
 	public static void main(String[] args) {
         DateFormat d=DateFormat.getInstance();
         //創(chuàng)建指定日期格式和中國語言環(huán)境的日期格式
         DateFormat d1=d.getDateInstance(DateFormat.FULL,Locale.CHINA);
         DateFormat d2=d.getDateInstance(DateFormat.LONG,Locale.CHINA);
         DateFormat d3=d.getDateInstance(DateFormat.SHORT,Locale.CHINA);
         DateFormat d4=d.getDateInstance(DateFormat.MEDIUM,Locale.CHINA);
         //創(chuàng)建指定時(shí)間格式和中國語言環(huán)境的時(shí)間格式
         DateFormat d5=d.getTimeInstance(DateFormat.FULL,Locale.CHINA);
         DateFormat d6=d.getTimeInstance(DateFormat.LONG,Locale.CHINA);
         DateFormat d7=d.getTimeInstance(DateFormat.SHORT,Locale.CHINA);
         DateFormat d8=d.getTimeInstance(DateFormat.MEDIUM,Locale.CHINA);
         //返回指定風(fēng)格和語言環(huán)境的日期
         String s1=d1.format(new Date());
         String s2=d2.format(new Date());
         String s3=d3.format(new Date());
         String s4=d4.format(new Date());
         //返回指定風(fēng)格和中國語言環(huán)境的時(shí)間
         String s5=d5.format(new Date());
         String s6=d6.format(new Date());
         String s7=d7.format(new Date());
         String s8=d8.format(new Date());
         System.out.println("FULL的是:"+s1+"\t"+s5);
         System.out.println("LONG的是:"+s2+"\t"+s6);
         System.out.println("SHORT的是:"+s3+"\t"+s7);
         System.out.println("MEDIUM的是:"+s4+"\t"+s8);
 	}
}

DateFormat d=new SimpleDateFormat();

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class dome2{
 	public static void main(String[] args) {
 		DateFormat d=new SimpleDateFormat("yyyy年MM月dd日HH時(shí)mm分ss秒SSS毫秒");
 		System.out.println(d.format(new Date()));
 	}
}