如何打印出当前的时间?

Question

import java.util.*;public class hhh{
  public static void main(String[] args) {  Calendar rightNow = Calendar.getInstance();
  Date time = rightNow.getTime();
  System.out.println(time.toString());
  }
}至于输出的格式你可以根据需要自己去format

Answer 1

具体可以查以下JAVA API里的DATE类，里面有好多方法！

Answer 2

protected String getSystemTime() {
Calendar calendar = new GregorianCalendar();
String year = calendar.get(Calendar.YEAR) + "";
String month =
(calendar.get(Calendar.MONTH) + 1) > 10
? (calendar.get(Calendar.MONTH) + 1) + ""
: "0" + (calendar.get(Calendar.MONTH) + 1);
String day =
calendar.get(Calendar.DAY_OF_MONTH) > 10
? "" + calendar.get(Calendar.DAY_OF_MONTH)
: "0" + calendar.get(Calendar.DAY_OF_MONTH);
String hour =
calendar.get(Calendar.HOUR_OF_DAY) > 10
? "" + calendar.get(Calendar.HOUR_OF_DAY)
: "0" + calendar.get(Calendar.HOUR_OF_DAY);
String minute =
calendar.get(Calendar.MINUTE) > 10
? "" + calendar.get(Calendar.MINUTE)
: "0" + calendar.get(Calendar.MINUTE);
String second =
calendar.get(Calendar.SECOND) > 10
? "" + calendar.get(Calendar.SECOND)
: "0" + calendar.get(Calendar.SECOND); return (
year
+ "-"
+ month
+ "-"
+ day
+ " "
+ hour
+ ":"
+ minute
+ ":"
+ second);
}

Answer 3

import java.util.*;
class DateTime
{  public static void main(String args[]) 
   {  Calendar calendar=Calendar.getInstance();
      calendar.setTime(new Date());             
      String year=String.valueOf(calendar.get(Calendar.YEAR)),
             month=String.valueOf(calendar.get(Calendar.MONTH)+1),
             day=String.valueOf(calendar.get(Calendar.DAY_OF_MONTH)),
             week=String.valueOf(calendar.get(Calendar.DAY_OF_WEEK)-1);
      int hour=calendar.get(Calendar.HOUR_OF_DAY),
          minute=calendar.get(Calendar.MINUTE),
          second=calendar.get(Calendar.SECOND);
      System.out.println("现在的时间是：");
      System.out.println(""+year+"年"+month+"月"+day+"日 "+ "星期"+week);
      System.out.println(""+hour+"时"+minute+"分"+second+"秒");
   }  
}

Answer 4

import java.util.*;
class DateTime
{  public static void main(String args[]) 
   {  Calendar calendar=Calendar.getInstance();
      calendar.setTime(new Date());             
      String year=String.valueOf(calendar.get(Calendar.YEAR)),
             month=String.valueOf(calendar.get(Calendar.MONTH)+1),
             day=String.valueOf(calendar.get(Calendar.DAY_OF_MONTH)),
             week=String.valueOf(calendar.get(Calendar.DAY_OF_WEEK)-1);
      int hour=calendar.get(Calendar.HOUR_OF_DAY),
          minute=calendar.get(Calendar.MINUTE),
          second=calendar.get(Calendar.SECOND);
      System.out.println("现在的时间是：");
      System.out.println(""+year+"年"+month+"月"+day+"日 "+ "星期"+week);
      System.out.println(""+hour+"时"+minute+"分"+second+"秒");
   }  
}