请高手回答：怎么样取得当前时间+2小时！

Question

import java.util.*;
public class Test { public static void main(String[] args){
Calendar rightNow = Calendar.getInstance();

int hour  = rightNow.get(Calendar.HOUR_OF_DAY);
System.out.println(hour);
hour += 2;

rightNow.set(Calendar.HOUR_OF_DAY,hour);
Date date = rightNow.getTime();
System.out.println(date);
 
}}

Answer 1

Calendar a=new GregorianCalendar();
           System.out.println(a.getTime());
           a.add(Calendar.HOUR,2);
           System.out.println(a.getTime());

Answer 2

Calendar   a=new GregorianCalendar();
             System.out.println(a.getTime());
             a.add(Calendar.HOUR,2);
             System.out.println(a.getTime());

Answer 3

new Date(System.currentTimeMillis()+ 2 * 3600 * 1000)

Answer 4

sql server 2000
select dateadd(day,2, getdate())