显示每月第一天是星期几

输入年份

import java.util.*;
import javax.swing.*;  
  class Main {
    public static void main (String[] args){
      Scanner input = new Scanner(System.in);
      
      System.out.print("Enter year: (e.g., 2008): ");
      int yearNotChange = input.nextInt();
      
      String yearString = yearNotChange + "";
      int month = 0;
      int oneDayOfMonth = 1;
      
      for(int i = 1; i <= 12; i++){
        int year = yearNotChange;
        month = i;
        if(month == 1 || month == 2){
          month += 12;
          year -= 1;
        }
        
        int dayOfWeek = (oneDayOfMonth + (int)((26 * (month + 1)) / 10) 
                       + (year % 100) + (int)((year % 100) / 4) 
                       + (int)((int)(year / 100) / 4) 
                       + 5 * (int)(year / 100)) % 7;

        String dayOfWeekString = "";
        switch(dayOfWeek){
          case 0:
            dayOfWeekString = "Saturday";
            break;
          case 1:
            dayOfWeekString = "Sunday";
            break;
          case 2:
            dayOfWeekString = "Monday";
            break;
          case 3:
            dayOfWeekString = "Tuesday";
            break;        
          case 4:
            dayOfWeekString = "Wednesday";
            break;
          case 5:
            dayOfWeekString = "Thursday";
            break;
          case 6:
            dayOfWeekString = "Friday";
            break; 
        }
        
        String monthString = "";
        switch(i){
          case 1:
            monthString = "January";
            break;
          case 2:
            monthString = "February";
            break;
          case 3:
            monthString = "March";
            break;        
          case 4:
            monthString = "April";
            break;
          case 5:
            monthString = "May";
            break;
          case 6:
            monthString = "June";
            break; 
          case 7:
            monthString = "July";
            break;
          case 8:
            monthString = "Augest";
            break;
          case 9:
            monthString = "September";
            break;
          case 10:
            monthString = "October";
            break; 
          case 11:
            monthString = "November";
            break;
          case 12:
            monthString = "December";
            break;
        }
        System.out.println(monthString + " 1, " + yearString +" is " + dayOfWeekString);     
      } 
    }
  }

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标签：显示,String,第一天,int,日历,System,yearNotChange,import,input
来源： https://www.cnblogs.com/doudou-20123/p/16313223.html