题解 | #输出某一年的各个月份的天数# Calendar

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

public class Main {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);
        int year = console.nextInt();
        
        //write your code here......
        Calendar cal = Calendar.getInstance();
        for(int i = 1; i <=12; i++)
        {
            cal.set(year,i,0);
            System.out.println(year + "年"+i+"月:"+cal.getActualMaximum(Calendar.DAY_OF_MONTH)+"天");
        }
        

    }
}

Calendar类