import java.util.Calendar; /** * 功能概述：计算指定年月的天数和周数<br> * 创建时间：2010-5-17 下午05:25:58<br> * */ public class Test{ public static void main(String[] args) { Calendar c = Calendar.getInstance(); c.set(Calendar.YEAR, 2010); // 2010年 c.set(Calendar.MONTH, 5); // 6 月 System.out.println("------------" + c.get(Calendar.YEAR) + "年" + (c.get(Calendar.MONTH) + 1) + "月的天数和周数-------------"); System.out.println("天数：" + c.getActualMaximum(Calendar.DAY_OF_MONTH)); System.out.println("周数：" + c.getActualMaximum(Calendar.WEEK_OF_MONTH)); } }