常用API-4

Calendar 日历类

import java.util.Calendar;

public class Calendar_ {
    public static void main(String[] args) {
        //获取Calendar对象, getInstance方法以多态的形式,返回子类的对象
        Calendar instance = Calendar.getInstance();
//        System.out.println(instance);
        //public int get(int field) 根据你给的日历.属性返回int值
        int year = instance.get(Calendar.YEAR);//属性是静态的,用(类名.属性)获得
        int month = instance.get(Calendar.MONTH)+1;//月份以"0"开始,所以要加1
        int date = instance.get(Calendar.DATE);
        System.out.println(year+"年"+month+"月"+date+"日");
    }
}