Java输出系统当前的日期(年月日时分秒毫秒)

package test.remote.tools.combine; 

import java.text.SimpleDateFormat; 
import java.util.Calendar; 
import java.util.Date; 
import java.util.GregorianCalendar; 

public class TestOutDate 
{ 
public static void main(String[] args) 
{ 
//method 1 
Calendar nowtime = new GregorianCalendar(); 
String strDateTime="[" String.format("d", nowtime.get(Calendar.YEAR)) "/"  
String.format("d", nowtime.get(Calendar.MONTH)) "/"   
String.format("d", nowtime.get(Calendar.DATE)) " "   
String.format("d", nowtime.get(Calendar.HOUR)) ":"   
String.format("d", nowtime.get(Calendar.MINUTE)) ":"   
String.format("d", nowtime.get(Calendar.SECOND)) "."   
String.format("d", nowtime.get(Calendar.MILLISECOND)) "]"; 
System.out.println(strDateTime); 

//method 2 
String msg=""; 
Date date = new Date(); 
SimpleDateFormat sdf = new SimpleDateFormat("YYYY/MM/dd HH:mm:ss.SSS"); 
msg ="[" sdf.format(date) "]"; 

System.out.println(msg); 
} 
}

运行结果：
[2013/08/09 05:54:32.578]
[2013/09/09 17:54:32.625]