下面的示例演示java.util.Calendar.Add()方法的用法。

package com.yiibai;
import java.util.Calendar;

public class CalendarDemo {

   public static void main(String[] args) {
   
      // create a calendar
      Calendar cal = Calendar.getInstance()
	  
      // print current date
      System.out.println("The current date is : " + cal.getTime());

      // add 20 days to the calendar
      cal.add(Calendar.DATE, 20);
      System.out.println("20 days later: " + cal.getTime());

      // subtract 2 months from the calendar
      cal.add(Calendar.MONTH, -2);
      System.out.println("2 months ago: " + cal.getTime());

      // subtract 5 year from the calendar
      cal.add(Calendar.YEAR, -5);
      System.out.println("5 years ago: " + cal.getTime());
   }
}

让我们来编译和运行上面的程序，这将产生以下结果：

The current date is : Thu Apr 26 02:13:28 EEST 2012
20 days later: Wed May 16 02:13:28 EEST 2012
2 months ago: Fri Mar 16 02:13:28 EET 2012
5 years ago: Fri Mar 16 02:13:28 EET 2007