1. import java.util.Calendar;  
2. import java.util.Date;  
3. import java.util.GregorianCalendar;  
4. publicclass TestOutDate   
5. {  
6.     publicstaticvoid main(String[] args)  
7.     {  
8.         //method 1
9.         Calendar nowtime = new GregorianCalendar();  
10.         String strDateTime="["+String.format("%04d", nowtime.get(Calendar.YEAR))+
    "/"+  
11.                 String.format("%02d", nowtime.get(Calendar.MONTH))+"/" +  
12.                 String.format("%02d", nowtime.get(Calendar.DATE))+" " +  
13.                 String.format("%02d", nowtime.get(Calendar.HOUR))+":" +  
14.                 String.format("%02d", nowtime.get(Calendar.MINUTE))+":" +  
15.                 String.format("%02d"
    , nowtime.get(Calendar.SECOND))+"." +  
16.                 String.format("%03d", nowtime.get(Calendar.MILLISECOND))+"]";  
17.         System.out.println(strDateTime);  
18.         //method 2
19.         String msg="";  
20.         Date date = new Date();  
21.         SimpleDateFormat sdf = new SimpleDateFormat("YYYY/MM/dd HH:mm:ss.SSS"
    );  
22.         msg+="["+sdf.format(date)+"]";  
23.         System.out.println(msg);  
24.     }  
25. }  

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("%04d", nowtime.get(Calendar.YEAR))+"/"+
				String.format("%02d", nowtime.get(Calendar.MONTH))+"/" +
				String.format("%02d", nowtime.get(Calendar.DATE))+" " +
				String.format("%02d", nowtime.get(Calendar.HOUR))+":" +
				String.format("%02d", nowtime.get(Calendar.MINUTE))+":" +
				String.format("%02d", nowtime.get(Calendar.SECOND))+"." +
				String.format("%03d", 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);
	}
}

執行結果：
[2013/08/09 05:54:32.578]
[2013/09/09 17:54:32.625]