java:Calendar类的add和set方法

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A:成员方法
    * public void add(int field,int amount)
    * public final void set(int year,int month,int date)

import java.util.Calendar;
//* A:成员方法
//* public void add(int field,int amount)
//* public final void set(int year,int month,int date)
public class Demo9_Calendar {
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Calendar c = Calendar.getInstance();//父类引用指向子类对象
		System.out.println(c.get(Calendar.YEAR)+"年"+getNum((c.get(Calendar.MONTH)+1))+"月"+getNum(c.get(Calendar.DAY_OF_MONTH))+"日"
				+getWeenk(c.get(Calendar.DAY_OF_WEEK)));//未调用add和set方法前
		c.add(Calendar.YEAR, 1);//对指定的字段向前减或者向后加
		c.set(2088,11,12);//修改指定字段
		System.out.println(c.get(Calendar.YEAR)+"年"+getNum((c.get(Calendar.MONTH)+1))+"月"+getNum(c.get(Calendar.DAY_OF_MONTH))+"日"
				+getWeenk(c.get(Calendar.DAY_OF_WEEK)));//添加后
	}

	
	public static String getWeenk(int week){       
		String [] arr = {"","星期日","星期一","星期二","星期三","星期四","星期五","星期六",};//定义一个数组        
		return arr[week];//返回值    
		}
	
	/*如果是个数前面补0，
	 * */
	public static String getNum(int num) {

		return num>9?""+num:"0"+num;
	}
	
}