javaCalendar类

• 日历类：Calendar
  * 抽象类:Calendar 类是一个抽象类，它为特定瞬间与一组诸如 YEAR、MONTH、DAY_OF_MONTH、HOUR 等 日历字段之间的转换提供了一些方法，
  * 父类:
  * 父接口:Serializable, Cloneable, Comparable
  * 子类:GregorianCalendar
  *

import java.util.Calendar;
import java.util.GregorianCalendar;

public class Demo {
	
	public static void main(String[] args) {
		//1：创建日历对象  封装的是子类对象  GregorianCalendar
		Calendar cd = Calendar.getInstance();
		//2:如何获取日历的各个信息
		//System.out.println(Calendar.YEAR);
		System.out.println(cd.get(Calendar.YEAR));
		System.out.println(cd.get(Calendar.MONTH)+1);
		System.out.println(cd.get(Calendar.DATE));
		
		System.out.println(cd.get(Calendar.HOUR_OF_DAY));
		System.out.println(cd.get(Calendar.MINUTE));
		System.out.println(cd.get(Calendar.SECOND));
		System.out.println(cd.get(Calendar.MILLISECOND));
		System.out.println(cd.get(Calendar.DAY_OF_YEAR));
		//System.out.println(cd);
		
		
		
	}

}