Java得到当前系统时间，精确到毫秒的几种方法

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Calendar;
 
 
public class MainProcess {
    public static void main(String[] args)
    {
        //func1
        Calendar Cld = Calendar.getInstance();
        int YY = Cld.get(Calendar.YEAR) ;
        int MM = Cld.get(Calendar.MONTH)+1;
        int DD = Cld.get(Calendar.DATE);
        int HH = Cld.get(Calendar.HOUR_OF_DAY);
        int mm = Cld.get(Calendar.MINUTE);
        int SS = Cld.get(Calendar.SECOND);
        int MI = Cld.get(Calendar.MILLISECOND);   
        //由整型而来,因此格式不加0,如  2016/5/5-1:1:32:694
        System.out.println(YY + "/" + MM + "/" + DD + "-" + HH + ":" + mm + ":" + SS + ":" + MI);
 
        //func2
        Calendar cal = Calendar.getInstance();
        Date date = cal.getTime();
        //  2016/05/05-01:01:34:364
        System.out.println(new SimpleDateFormat("yyyy/MM/dd-HH:mm:ss:SSS").format(date));
 
        //func3  2016/05/05-01:01:34:364
        System.out.println(new SimpleDateFormat("yyyy/MM/dd-HH:mm:ss:SSS").format(new Date()));
    }
}