【JAVA 课程设计 之 万年历】「建议收藏」

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万年历：输入要查看的年份，输出该年份的日历

实现代码：

package CJF;

import java.util.*;

public class ks {

	public static void main(String[] args) {
          int x = 3,n,m,y,r,k;
          System.out.println("******您好，2016年华人款万年历，枫枫为您服务******");
          System.out.println("**********************请输入查找年份********");
          System.out.println();
          Scanner input = new Scanner(System.in);
          n = input.nextInt(); 
          int cut = 365 * 3 + 366;
          if(n >= 1997){
        	  m = n - 1997;
        	  int a = m / 4;
        	  int b = m % 4;
        	  x = (x + cut * a + b * 365) % 7;
          }
          else{
        	  m = 1996 - n;
        	  x =(366 - x + 2) % 7; // 先转换为1996年为基准年份
        	  int a = m / 4;
        	  int b = m % 4;
        	  cut = (cut * a + b * 365) % 7;
        	  x = (x - cut + 7) % 7; 

          }
          if(x == 0) x = 7;
          for(y = 1 ; y <= 12 ; y++){
            	  if(y == 1 || y == 3 || y == 5 || y == 7 || y == 8 || y == 10 || y == 12)
            		  k = 31;
            	  else if(y == 2){
            		  if(n % 400 == 0 || (n % 4 == 0 && n % 100 != 0))
            			  k = 29;
            		  else 
            			  k = 28;
            	  }
            	  else
            		  k = 30;
            	  System.out.println();
            	  System.out.println("********** " + n + " 年  " + y + " 月  " + "**********");
            	  System.out.println("Mon  Tue  Wen  Thu  Fri  Sat  Sun");
            	  for(int i = 1 ; i < x ; i++)
            		  System.out.print("     ");
            	  for(r = 1; r <= k; r++,x++){
            		  if(r <= 9)
            		      System.out.print(r + "    ");
            		  else
            			  System.out.print(r + "   ");
            		  if(x % 7 == 0){
            			  System.out.println();
            		      x = 0;
            		  }
            	  }
            	  System.out.println();
              }
          System.out.println("******本次服务到处结束，枫枫期待与您的下次会面******");
          }
	}

对JAVA来讲_{一个main方法写下了总感觉不太合适，把代码格式稍微改下}层次和结构更清晰了点~

实现代码：

package CJF;

import java.util.*;

public class ks {

    public static void main(String[] args) {
          System.out.println("******您好，2016年华人款万年历，枫枫为您服务******");
          System.out.println("**********************请输入查找年份********");
          System.out.println();
          Scanner input = new Scanner(System.in);
          int n = input.nextInt(); 
          int x = Nf(n); // 确认该年第一天是星期几
          if(x == 0) x = 7;
          for(int y = 1 ; y <= 12 ; y++){
              int k = Yf(n,y); // 判断该年该月有多少天
                  System.out.println();
                  System.out.println("********** " + n + " 年  " + y + " 月  " + "**********");
                  System.out.println("Mon  Tue  Wen  Thu  Fri  Sat  Sun");
                  x = R(x,k); // 调整日的输出格式
              }
          System.out.println("******本次服务到处结束，枫枫期待与您的下次会面******");
    }
    public static int Nf(int n){ // 确认该年第一天是星期几
        int m,x = 3;
        int cut = 365 * 3 + 366;
        if(n >= 1997){
            m = n - 1997;
            int a = m / 4;
            int b = m % 4;
            x = (x + cut * a + b * 365) % 7;
        }
        else{
            m = 1996 - n;
            x =(366 - x + 2) % 7; // 先转换为1996年为基准年份
            int a = m / 4;
            int b = m % 4;
            cut = (cut * a + b * 365) % 7;
            x = (x - cut + 7) % 7; 
        }
        return x;
    }
    public static int Yf(int n,int y){ // 判断该年该月有多少天
        int k = 0;
            if(y == 1 || y == 3 || y == 5 || y == 7 || y == 8 || y == 10 || y == 12)
                k = 31;
            else if(y == 2){
                if(n % 400 == 0 || (n % 4 == 0 && n % 100 != 0))
                    k = 29;
                else 
                    k = 28;
            }
            else
                k = 30;
        return k;
    }
    public static int R(int x,int k){ // 调整日的输出格式
        for(int i = 1 ; i < x ; i++)
            System.out.print("     ");
        for(int r = 1; r <= k; r++,x++){
            if(r <= 9)
                System.out.print(r + "    ");
            else
                System.out.print(r + "   ");
            if(x % 7 == 0){
                System.out.println();
                x = 0;
            }
        }
        System.out.println();
        if(x == 0) x = 7;
        return x;
    }
}