calender类java

下面是一个简单的Java Calendar类例子，它可以打印出指定年份的每个月份的日历：

import java.util.*;

public class CalendarExample {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入年份：");
        int year = scanner.nextInt();
        
        for (int month = 0; month < 12; month++) {
            Calendar calendar = Calendar.getInstance();
            calendar.set(year, month, 1);
            int daysInMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
            int startDay = calendar.get(Calendar.DAY_OF_WEEK);
            
            System.out.println(month + 1 + "月 " + year);
            System.out.println("日 一 二 三 四 五 六");
            
            for (int i = 1; i < startDay; i++) {
                System.out.print("   ");
            }
            
            for (int day = 1; day <= daysInMonth; day++) {
                System.out.printf("%2d ", day);
                
                if ((day + startDay - 1) % 7 == 0) {
                    System.out.println();
                }
            }
            
            System.out.println("\n");
        }
    }
}

运行该例子，输入年份后，将会打印出该年份的每个月份的日历。