Calendar类的用法

package it_03;

import java.util.Calendar;

public class Demo1 {
    public static void main(String[] args) {
        Calendar rightNow = Calendar.getInstance();
//        System.out.println(rightNow);
        int year = rightNow.get(Calendar.YEAR);
        int month = rightNow.get(Calendar.MONTH)+1;
        int date = rightNow.get(Calendar.DATE);
        System.out.println(year+"年"+month+"月"+date+"日");
    }
}

package it_03;

import java.util.Calendar;
import java.util.Scanner;

public class Demo2 {
    public static void main(String[] args) {
        Scanner sc= new Scanner(System.in);
        System.out.println("put year");
        int year = sc.nextInt();
        Calendar c =Calendar.getInstance();
        c.set(year,2,1);
        c.add(Calendar.DATE,-1);
        int date = c.get(Calendar.DATE);
        System.out.println(date);


    }
}