Api09 - Calendar4

package day11;

import java.util.Calendar;

public class Api09 {
	public static String toString(Calendar date) {
		return date.get(Calendar.YEAR) + "년 " + (date.get(Calendar.MONTH)+1) + "월 " 
				+ date.get(Calendar.DATE) + "일 ";
	}
	public static void main(String[] args) {

		Calendar date = Calendar.getInstance(); 
		
		date.set(2022, 1, 28);
		System.out.println(toString(date));
		System.out.println("== 1일 후 ==");
		date.add(Calendar.DATE, 1);
		System.out.println(toString(date));
		
		System.out.println("== 6달 전 ==");
		date.add(Calendar.MONTH, -6);
		System.out.println(toString(date));
		
		System.out.println("== 31일 후 roll ==");
		date.roll(Calendar.DATE, 31);
		System.out.println(toString(date));
		

		
	}
}